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NOAA REFS forecast, 3 hourly, virtual

map-optimized · low-latency
ID
noaa-refs-forecast-3-hourly-virtual
Spatial domain Continental United States
Spatial resolution 3 km
Time domain Forecasts initialized 2026-08-13 00:00:00 UTC to Present
Time resolution Forecasts initialized every 6 hours
Forecast domain Forecast lead time 3-60 hours ahead
Forecast resolution 3 hourly

STAC (browse) · validation report

The RRFS Ensemble Forecast System (REFS) is a National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Prediction (NCEP) ensemble product system. It produces ensemble products on a 3 km grid, including means, spreads and probabilities of exceeding thresholds, from the current and 6 hour old cycles of the deterministic Rapid Refresh Forecast System (RRFS) and its ensemble (RRFS ENS), plus two HRRR members over the continental United States.

NOAA REFS is pre-operational, so expect changes to the model data and to the structure of this dataset.

This dataset is an archive of past and present REFS ensemble products, optimized for spatial (map) access patterns. Forecasts are identified by an initialization time (init_time) denoting the start time of the model run, and step forward every 3 hours along the lead_time dimension from 3 hours out to 60 hours.

Ensemble means and standard deviations are stored along the statistic dimension. Other products, such as probabilities of exceeding a threshold, are separate variables.

This dataset uses the native RRFS Lambert Conformal Conic projection, with spatial indexing along the x and y dimensions. The example notebook shows how to use the embedded spatial reference to select geographic areas of interest.

Note: dynamical-catalog>=1.0.1 and gribberish>=1.8.4 (or zarr>=3.2 icechunk>=2.0 gribberish>=1.8.4) are required.

Related Datasets

Examples

RRFS and REFS forecasts, virtual (Github)
RRFS and REFS forecasts, virtual (Colab) 
import dynamical_catalog  # dynamical-catalog>=1.0.1

ds = dynamical_catalog.open("noaa-refs-forecast-3-hourly-virtual", chunks=None)
ds["total_precipitation_3_hour_surface"].sel(init_time="2026-09-16T12", lead_time="24h", statistic="mean")
NOAA REFS forecast, 3 hourly, virtual · Precipitation map

Dimensions

min max units
init_time 2026-08-13T00:00:00Z Present seconds since 1970-01-01
lead_time 10800 216000 seconds
statistic Present 1
x -2697520.143 2696479.857 m
y -1587306.153 1586693.847 m

Variables

Access a variable by its name (the bold identifier, e.g. ds["ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_127"]).

Dimensions: init_time × lead_time × y × x

variable units
ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_127 Ensemble agreement scale probability of 12 hour total precipitation (surface) above 127 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_127)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Ensemble agreement scale probability of 12 hour total precipitation (surface) above 127 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_12p7 Ensemble agreement scale probability of 12 hour total precipitation (surface) above 12.7 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_12p7)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Ensemble agreement scale probability of 12 hour total precipitation (surface) above 12.7 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_25p4 Ensemble agreement scale probability of 12 hour total precipitation (surface) above 25.4 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_25p4)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Ensemble agreement scale probability of 12 hour total precipitation (surface) above 25.4 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_2p54 Ensemble agreement scale probability of 12 hour total precipitation (surface) above 2.54 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_2p54)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Ensemble agreement scale probability of 12 hour total precipitation (surface) above 2.54 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_50p8 Ensemble agreement scale probability of 12 hour total precipitation (surface) above 50.8 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_50p8)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Ensemble agreement scale probability of 12 hour total precipitation (surface) above 50.8 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_6p35 Ensemble agreement scale probability of 12 hour total precipitation (surface) above 6.35 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_6p35)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Ensemble agreement scale probability of 12 hour total precipitation (surface) above 6.35 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_76p2 Ensemble agreement scale probability of 12 hour total precipitation (surface) above 76.2 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_12_hour_surface_above_76p2)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Ensemble agreement scale probability of 12 hour total precipitation (surface) above 76.2 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_127 Ensemble agreement scale probability of 24 hour total precipitation (surface) above 127 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_127)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Ensemble agreement scale probability of 24 hour total precipitation (surface) above 127 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_12p7 Ensemble agreement scale probability of 24 hour total precipitation (surface) above 12.7 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_12p7)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Ensemble agreement scale probability of 24 hour total precipitation (surface) above 12.7 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_25p4 Ensemble agreement scale probability of 24 hour total precipitation (surface) above 25.4 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_25p4)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Ensemble agreement scale probability of 24 hour total precipitation (surface) above 25.4 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_2p54 Ensemble agreement scale probability of 24 hour total precipitation (surface) above 2.54 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_2p54)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Ensemble agreement scale probability of 24 hour total precipitation (surface) above 2.54 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_50p8 Ensemble agreement scale probability of 24 hour total precipitation (surface) above 50.8 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_50p8)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Ensemble agreement scale probability of 24 hour total precipitation (surface) above 50.8 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_6p35 Ensemble agreement scale probability of 24 hour total precipitation (surface) above 6.35 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_6p35)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Ensemble agreement scale probability of 24 hour total precipitation (surface) above 6.35 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_76p2 Ensemble agreement scale probability of 24 hour total precipitation (surface) above 76.2 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_24_hour_surface_above_76p2)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Ensemble agreement scale probability of 24 hour total precipitation (surface) above 76.2 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_0p254 Ensemble agreement scale probability of 3 hour total precipitation (surface) above 0.254 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_0p254)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Ensemble agreement scale probability of 3 hour total precipitation (surface) above 0.254 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_12p7 Ensemble agreement scale probability of 3 hour total precipitation (surface) above 12.7 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_12p7)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Ensemble agreement scale probability of 3 hour total precipitation (surface) above 12.7 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_25p4 Ensemble agreement scale probability of 3 hour total precipitation (surface) above 25.4 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_25p4)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Ensemble agreement scale probability of 3 hour total precipitation (surface) above 25.4 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_50p8 Ensemble agreement scale probability of 3 hour total precipitation (surface) above 50.8 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_50p8)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Ensemble agreement scale probability of 3 hour total precipitation (surface) above 50.8 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_6p35 Ensemble agreement scale probability of 3 hour total precipitation (surface) above 6.35 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_3_hour_surface_above_6p35)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Ensemble agreement scale probability of 3 hour total precipitation (surface) above 6.35 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_0p254 Ensemble agreement scale probability of 6 hour total precipitation (surface) above 0.254 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_0p254)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total precipitation (surface) above 0.254 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_12p7 Ensemble agreement scale probability of 6 hour total precipitation (surface) above 12.7 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_12p7)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total precipitation (surface) above 12.7 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_25p4 Ensemble agreement scale probability of 6 hour total precipitation (surface) above 25.4 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_25p4)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total precipitation (surface) above 25.4 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_50p8 Ensemble agreement scale probability of 6 hour total precipitation (surface) above 50.8 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_50p8)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total precipitation (surface) above 50.8 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_6p35 Ensemble agreement scale probability of 6 hour total precipitation (surface) above 6.35 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_6p35)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total precipitation (surface) above 6.35 kg m-2. percent
ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_76p2 Ensemble agreement scale probability of 6 hour total precipitation (surface) above 76.2 kg m-2 (ensemble_agreement_scale_probability_of_total_precipitation_6_hour_surface_above_76p2)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total precipitation (surface) above 76.2 kg m-2. percent
ensemble_agreement_scale_probability_of_total_snowfall_3_hour_surface_above_0p025 Ensemble agreement scale probability of 3 hour total snowfall (surface) above 0.025 m (ensemble_agreement_scale_probability_of_total_snowfall_3_hour_surface_above_0p025)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Ensemble agreement scale probability of 3 hour total snowfall (surface) above 0.025 m. percent
ensemble_agreement_scale_probability_of_total_snowfall_3_hour_surface_above_0p076 Ensemble agreement scale probability of 3 hour total snowfall (surface) above 0.076 m (ensemble_agreement_scale_probability_of_total_snowfall_3_hour_surface_above_0p076)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Ensemble agreement scale probability of 3 hour total snowfall (surface) above 0.076 m. percent
ensemble_agreement_scale_probability_of_total_snowfall_6_hour_surface_above_0p025 Ensemble agreement scale probability of 6 hour total snowfall (surface) above 0.025 m (ensemble_agreement_scale_probability_of_total_snowfall_6_hour_surface_above_0p025)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total snowfall (surface) above 0.025 m. percent
ensemble_agreement_scale_probability_of_total_snowfall_6_hour_surface_above_0p076 Ensemble agreement scale probability of 6 hour total snowfall (surface) above 0.076 m (ensemble_agreement_scale_probability_of_total_snowfall_6_hour_surface_above_0p076)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total snowfall (surface) above 0.076 m. percent
ensemble_agreement_scale_probability_of_total_snowfall_6_hour_surface_above_0p152 Ensemble agreement scale probability of 6 hour total snowfall (surface) above 0.152 m (ensemble_agreement_scale_probability_of_total_snowfall_6_hour_surface_above_0p152)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Ensemble agreement scale probability of 6 hour total snowfall (surface) above 0.152 m. percent
localized_probability_matched_mean_total_precipitation_3_hour_surface Localized probability-matched mean of total precipitation (localized_probability_matched_mean_total_precipitation_3_hour_surface)Accumulated over the preceding 3 hours. Published every 3 forecast hours from lead 3 hours. kg m-2
localized_probability_matched_mean_total_precipitation_6_hour_surface Localized probability-matched mean of total precipitation (localized_probability_matched_mean_total_precipitation_6_hour_surface)Accumulated over the preceding 6 hours. Published every 3 forecast hours from lead 6 hours. kg m-2
mean_probability_matched_mean_average_total_precipitation_3_hour_surface Average of the ensemble mean and probability-matched mean of total precipitation (mean_probability_matched_mean_average_total_precipitation_3_hour_surface)Accumulated over the preceding 3 hours. Published every 3 forecast hours from lead 3 hours. kg m-2
neighborhood_probability_of_freezing_rain_12_hour_surface_above_0p254 Neighborhood probability of 12 hour freezing rain (surface) above 0.254 kg m-2 (neighborhood_probability_of_freezing_rain_12_hour_surface_above_0p254)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour freezing rain (surface) above 0.254 kg m-2. percent
neighborhood_probability_of_freezing_rain_12_hour_surface_above_12p7 Neighborhood probability of 12 hour freezing rain (surface) above 12.7 kg m-2 (neighborhood_probability_of_freezing_rain_12_hour_surface_above_12p7)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour freezing rain (surface) above 12.7 kg m-2. percent
neighborhood_probability_of_freezing_rain_12_hour_surface_above_2p54 Neighborhood probability of 12 hour freezing rain (surface) above 2.54 kg m-2 (neighborhood_probability_of_freezing_rain_12_hour_surface_above_2p54)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour freezing rain (surface) above 2.54 kg m-2. percent
neighborhood_probability_of_freezing_rain_12_hour_surface_above_6p35 Neighborhood probability of 12 hour freezing rain (surface) above 6.35 kg m-2 (neighborhood_probability_of_freezing_rain_12_hour_surface_above_6p35)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour freezing rain (surface) above 6.35 kg m-2. percent
neighborhood_probability_of_freezing_rain_24_hour_surface_above_0p254 Neighborhood probability of 24 hour freezing rain (surface) above 0.254 kg m-2 (neighborhood_probability_of_freezing_rain_24_hour_surface_above_0p254)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour freezing rain (surface) above 0.254 kg m-2. percent
neighborhood_probability_of_freezing_rain_24_hour_surface_above_12p7 Neighborhood probability of 24 hour freezing rain (surface) above 12.7 kg m-2 (neighborhood_probability_of_freezing_rain_24_hour_surface_above_12p7)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour freezing rain (surface) above 12.7 kg m-2. percent
neighborhood_probability_of_freezing_rain_24_hour_surface_above_25p4 Neighborhood probability of 24 hour freezing rain (surface) above 25.4 kg m-2 (neighborhood_probability_of_freezing_rain_24_hour_surface_above_25p4)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour freezing rain (surface) above 25.4 kg m-2. percent
neighborhood_probability_of_freezing_rain_24_hour_surface_above_2p54 Neighborhood probability of 24 hour freezing rain (surface) above 2.54 kg m-2 (neighborhood_probability_of_freezing_rain_24_hour_surface_above_2p54)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour freezing rain (surface) above 2.54 kg m-2. percent
neighborhood_probability_of_freezing_rain_24_hour_surface_above_6p35 Neighborhood probability of 24 hour freezing rain (surface) above 6.35 kg m-2 (neighborhood_probability_of_freezing_rain_24_hour_surface_above_6p35)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour freezing rain (surface) above 6.35 kg m-2. percent
neighborhood_probability_of_freezing_rain_3_hour_surface_above_0p254 Neighborhood probability of 3 hour freezing rain (surface) above 0.254 kg m-2 (neighborhood_probability_of_freezing_rain_3_hour_surface_above_0p254)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour freezing rain (surface) above 0.254 kg m-2. percent
neighborhood_probability_of_freezing_rain_3_hour_surface_above_2p54 Neighborhood probability of 3 hour freezing rain (surface) above 2.54 kg m-2 (neighborhood_probability_of_freezing_rain_3_hour_surface_above_2p54)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour freezing rain (surface) above 2.54 kg m-2. percent
neighborhood_probability_of_freezing_rain_3_hour_surface_above_6p35 Neighborhood probability of 3 hour freezing rain (surface) above 6.35 kg m-2 (neighborhood_probability_of_freezing_rain_3_hour_surface_above_6p35)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour freezing rain (surface) above 6.35 kg m-2. percent
neighborhood_probability_of_freezing_rain_6_hour_surface_above_0p254 Neighborhood probability of 6 hour freezing rain (surface) above 0.254 kg m-2 (neighborhood_probability_of_freezing_rain_6_hour_surface_above_0p254)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour freezing rain (surface) above 0.254 kg m-2. percent
neighborhood_probability_of_freezing_rain_6_hour_surface_above_12p7 Neighborhood probability of 6 hour freezing rain (surface) above 12.7 kg m-2 (neighborhood_probability_of_freezing_rain_6_hour_surface_above_12p7)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour freezing rain (surface) above 12.7 kg m-2. percent
neighborhood_probability_of_freezing_rain_6_hour_surface_above_2p54 Neighborhood probability of 6 hour freezing rain (surface) above 2.54 kg m-2 (neighborhood_probability_of_freezing_rain_6_hour_surface_above_2p54)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour freezing rain (surface) above 2.54 kg m-2. percent
neighborhood_probability_of_freezing_rain_6_hour_surface_above_6p35 Neighborhood probability of 6 hour freezing rain (surface) above 6.35 kg m-2 (neighborhood_probability_of_freezing_rain_6_hour_surface_above_6p35)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour freezing rain (surface) above 6.35 kg m-2. percent
neighborhood_probability_of_precipitation_exceeding_100_year_average_recurrence_interval_24_hour_surface Neighborhood probability of 24 hour precipitation above the 100 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_100_year_average_recurrence_interval_24_hour_surface)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour precipitation above the 100 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_100_year_average_recurrence_interval_6_hour_surface Neighborhood probability of 6 hour precipitation above the 100 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_100_year_average_recurrence_interval_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 100 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_10_year_average_recurrence_interval_24_hour_surface Neighborhood probability of 24 hour precipitation above the 10 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_10_year_average_recurrence_interval_24_hour_surface)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour precipitation above the 10 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_10_year_average_recurrence_interval_6_hour_surface Neighborhood probability of 6 hour precipitation above the 10 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_10_year_average_recurrence_interval_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 10 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_1_year_average_recurrence_interval_24_hour_surface Neighborhood probability of 24 hour precipitation above the 1 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_1_year_average_recurrence_interval_24_hour_surface)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour precipitation above the 1 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_1_year_average_recurrence_interval_6_hour_surface Neighborhood probability of 6 hour precipitation above the 1 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_1_year_average_recurrence_interval_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 1 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_25_year_average_recurrence_interval_24_hour_surface Neighborhood probability of 24 hour precipitation above the 25 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_25_year_average_recurrence_interval_24_hour_surface)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour precipitation above the 25 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_25_year_average_recurrence_interval_6_hour_surface Neighborhood probability of 6 hour precipitation above the 25 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_25_year_average_recurrence_interval_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 25 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_2_year_average_recurrence_interval_24_hour_surface Neighborhood probability of 24 hour precipitation above the 2 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_2_year_average_recurrence_interval_24_hour_surface)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour precipitation above the 2 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_2_year_average_recurrence_interval_6_hour_surface Neighborhood probability of 6 hour precipitation above the 2 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_2_year_average_recurrence_interval_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 2 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_3_hour_flash_flood_guidance_3_hour_surface Neighborhood probability of 3 hour precipitation above the 3 hour flash flood guidance depth (neighborhood_probability_of_precipitation_exceeding_3_hour_flash_flood_guidance_3_hour_surface)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour precipitation above the 3 hour flash flood guidance depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_50_year_average_recurrence_interval_24_hour_surface Neighborhood probability of 24 hour precipitation above the 50 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_50_year_average_recurrence_interval_24_hour_surface)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour precipitation above the 50 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_50_year_average_recurrence_interval_6_hour_surface Neighborhood probability of 6 hour precipitation above the 50 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_50_year_average_recurrence_interval_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 50 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_5_year_average_recurrence_interval_24_hour_surface Neighborhood probability of 24 hour precipitation above the 5 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_5_year_average_recurrence_interval_24_hour_surface)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour precipitation above the 5 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_5_year_average_recurrence_interval_6_hour_surface Neighborhood probability of 6 hour precipitation above the 5 year average recurrence interval depth (neighborhood_probability_of_precipitation_exceeding_5_year_average_recurrence_interval_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 5 year average recurrence interval depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_precipitation_exceeding_6_hour_flash_flood_guidance_6_hour_surface Neighborhood probability of 6 hour precipitation above the 6 hour flash flood guidance depth (neighborhood_probability_of_precipitation_exceeding_6_hour_flash_flood_guidance_6_hour_surface)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour precipitation above the 6 hour flash flood guidance depth. Probabilities compare precipitation with a spatially varying guidance or recurrence-interval depth. Negative values are unavailable thresholds blended into neighboring cells by smoothing; positive values near coverage boundaries can also be biased low. Mask values < -0.1. percent
neighborhood_probability_of_total_precipitation_12_hour_surface_above_127 Neighborhood probability of 12 hour total precipitation (surface) above 127 kg m-2 (neighborhood_probability_of_total_precipitation_12_hour_surface_above_127)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total precipitation (surface) above 127 kg m-2. percent
neighborhood_probability_of_total_precipitation_12_hour_surface_above_12p7 Neighborhood probability of 12 hour total precipitation (surface) above 12.7 kg m-2 (neighborhood_probability_of_total_precipitation_12_hour_surface_above_12p7)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total precipitation (surface) above 12.7 kg m-2. percent
neighborhood_probability_of_total_precipitation_12_hour_surface_above_203p2 Neighborhood probability of 12 hour total precipitation (surface) above 203.2 kg m-2 (neighborhood_probability_of_total_precipitation_12_hour_surface_above_203p2)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total precipitation (surface) above 203.2 kg m-2. percent
neighborhood_probability_of_total_precipitation_12_hour_surface_above_25p4 Neighborhood probability of 12 hour total precipitation (surface) above 25.4 kg m-2 (neighborhood_probability_of_total_precipitation_12_hour_surface_above_25p4)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total precipitation (surface) above 25.4 kg m-2. percent
neighborhood_probability_of_total_precipitation_12_hour_surface_above_50p8 Neighborhood probability of 12 hour total precipitation (surface) above 50.8 kg m-2 (neighborhood_probability_of_total_precipitation_12_hour_surface_above_50p8)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total precipitation (surface) above 50.8 kg m-2. percent
neighborhood_probability_of_total_precipitation_12_hour_surface_above_76p2 Neighborhood probability of 12 hour total precipitation (surface) above 76.2 kg m-2 (neighborhood_probability_of_total_precipitation_12_hour_surface_above_76p2)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total precipitation (surface) above 76.2 kg m-2. percent
neighborhood_probability_of_total_precipitation_24_hour_surface_above_127 Neighborhood probability of 24 hour total precipitation (surface) above 127 kg m-2 (neighborhood_probability_of_total_precipitation_24_hour_surface_above_127)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total precipitation (surface) above 127 kg m-2. percent
neighborhood_probability_of_total_precipitation_24_hour_surface_above_12p7 Neighborhood probability of 24 hour total precipitation (surface) above 12.7 kg m-2 (neighborhood_probability_of_total_precipitation_24_hour_surface_above_12p7)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total precipitation (surface) above 12.7 kg m-2. percent
neighborhood_probability_of_total_precipitation_24_hour_surface_above_203p2 Neighborhood probability of 24 hour total precipitation (surface) above 203.2 kg m-2 (neighborhood_probability_of_total_precipitation_24_hour_surface_above_203p2)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total precipitation (surface) above 203.2 kg m-2. percent
neighborhood_probability_of_total_precipitation_24_hour_surface_above_25p4 Neighborhood probability of 24 hour total precipitation (surface) above 25.4 kg m-2 (neighborhood_probability_of_total_precipitation_24_hour_surface_above_25p4)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total precipitation (surface) above 25.4 kg m-2. percent
neighborhood_probability_of_total_precipitation_24_hour_surface_above_50p8 Neighborhood probability of 24 hour total precipitation (surface) above 50.8 kg m-2 (neighborhood_probability_of_total_precipitation_24_hour_surface_above_50p8)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total precipitation (surface) above 50.8 kg m-2. percent
neighborhood_probability_of_total_precipitation_24_hour_surface_above_76p2 Neighborhood probability of 24 hour total precipitation (surface) above 76.2 kg m-2 (neighborhood_probability_of_total_precipitation_24_hour_surface_above_76p2)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total precipitation (surface) above 76.2 kg m-2. percent
neighborhood_probability_of_total_precipitation_3_hour_surface_above_127 Neighborhood probability of 3 hour total precipitation (surface) above 127 kg m-2 (neighborhood_probability_of_total_precipitation_3_hour_surface_above_127)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total precipitation (surface) above 127 kg m-2. percent
neighborhood_probability_of_total_precipitation_3_hour_surface_above_12p7 Neighborhood probability of 3 hour total precipitation (surface) above 12.7 kg m-2 (neighborhood_probability_of_total_precipitation_3_hour_surface_above_12p7)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total precipitation (surface) above 12.7 kg m-2. percent
neighborhood_probability_of_total_precipitation_3_hour_surface_above_25p4 Neighborhood probability of 3 hour total precipitation (surface) above 25.4 kg m-2 (neighborhood_probability_of_total_precipitation_3_hour_surface_above_25p4)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total precipitation (surface) above 25.4 kg m-2. percent
neighborhood_probability_of_total_precipitation_3_hour_surface_above_50p8 Neighborhood probability of 3 hour total precipitation (surface) above 50.8 kg m-2 (neighborhood_probability_of_total_precipitation_3_hour_surface_above_50p8)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total precipitation (surface) above 50.8 kg m-2. percent
neighborhood_probability_of_total_precipitation_3_hour_surface_above_76p2 Neighborhood probability of 3 hour total precipitation (surface) above 76.2 kg m-2 (neighborhood_probability_of_total_precipitation_3_hour_surface_above_76p2)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total precipitation (surface) above 76.2 kg m-2. percent
neighborhood_probability_of_total_precipitation_6_hour_surface_above_127 Neighborhood probability of 6 hour total precipitation (surface) above 127 kg m-2 (neighborhood_probability_of_total_precipitation_6_hour_surface_above_127)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total precipitation (surface) above 127 kg m-2. percent
neighborhood_probability_of_total_precipitation_6_hour_surface_above_12p7 Neighborhood probability of 6 hour total precipitation (surface) above 12.7 kg m-2 (neighborhood_probability_of_total_precipitation_6_hour_surface_above_12p7)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total precipitation (surface) above 12.7 kg m-2. percent
neighborhood_probability_of_total_precipitation_6_hour_surface_above_25p4 Neighborhood probability of 6 hour total precipitation (surface) above 25.4 kg m-2 (neighborhood_probability_of_total_precipitation_6_hour_surface_above_25p4)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total precipitation (surface) above 25.4 kg m-2. percent
neighborhood_probability_of_total_precipitation_6_hour_surface_above_50p8 Neighborhood probability of 6 hour total precipitation (surface) above 50.8 kg m-2 (neighborhood_probability_of_total_precipitation_6_hour_surface_above_50p8)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total precipitation (surface) above 50.8 kg m-2. percent
neighborhood_probability_of_total_precipitation_6_hour_surface_above_76p2 Neighborhood probability of 6 hour total precipitation (surface) above 76.2 kg m-2 (neighborhood_probability_of_total_precipitation_6_hour_surface_above_76p2)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total precipitation (surface) above 76.2 kg m-2. percent
neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p025 Neighborhood probability of 12 hour total snowfall (surface) above 0.025 m (neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p025)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total snowfall (surface) above 0.025 m. percent
neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p076 Neighborhood probability of 12 hour total snowfall (surface) above 0.076 m (neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p076)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total snowfall (surface) above 0.076 m. percent
neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p152 Neighborhood probability of 12 hour total snowfall (surface) above 0.152 m (neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p152)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total snowfall (surface) above 0.152 m. percent
neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p304 Neighborhood probability of 12 hour total snowfall (surface) above 0.304 m (neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p304)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total snowfall (surface) above 0.304 m. percent
neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p457 Neighborhood probability of 12 hour total snowfall (surface) above 0.457 m (neighborhood_probability_of_total_snowfall_12_hour_surface_above_0p457)Threshold applies to the preceding 12 hours of accumulation. Published every 3 forecast hours from lead 12 hours. Neighborhood probability of 12 hour total snowfall (surface) above 0.457 m. percent
neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p025 Neighborhood probability of 24 hour total snowfall (surface) above 0.025 m (neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p025)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total snowfall (surface) above 0.025 m. percent
neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p076 Neighborhood probability of 24 hour total snowfall (surface) above 0.076 m (neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p076)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total snowfall (surface) above 0.076 m. percent
neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p152 Neighborhood probability of 24 hour total snowfall (surface) above 0.152 m (neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p152)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total snowfall (surface) above 0.152 m. percent
neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p304 Neighborhood probability of 24 hour total snowfall (surface) above 0.304 m (neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p304)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total snowfall (surface) above 0.304 m. percent
neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p457 Neighborhood probability of 24 hour total snowfall (surface) above 0.457 m (neighborhood_probability_of_total_snowfall_24_hour_surface_above_0p457)Threshold applies to the preceding 24 hours of accumulation. Published every 3 forecast hours from lead 24 hours. Neighborhood probability of 24 hour total snowfall (surface) above 0.457 m. percent
neighborhood_probability_of_total_snowfall_3_hour_surface_above_0p025 Neighborhood probability of 3 hour total snowfall (surface) above 0.025 m (neighborhood_probability_of_total_snowfall_3_hour_surface_above_0p025)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total snowfall (surface) above 0.025 m. percent
neighborhood_probability_of_total_snowfall_3_hour_surface_above_0p076 Neighborhood probability of 3 hour total snowfall (surface) above 0.076 m (neighborhood_probability_of_total_snowfall_3_hour_surface_above_0p076)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total snowfall (surface) above 0.076 m. percent
neighborhood_probability_of_total_snowfall_3_hour_surface_above_0p152 Neighborhood probability of 3 hour total snowfall (surface) above 0.152 m (neighborhood_probability_of_total_snowfall_3_hour_surface_above_0p152)Threshold applies to the preceding 3 hours of accumulation. Published every 3 forecast hours from lead 3 hours. Neighborhood probability of 3 hour total snowfall (surface) above 0.152 m. percent
neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p025 Neighborhood probability of 6 hour total snowfall (surface) above 0.025 m (neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p025)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total snowfall (surface) above 0.025 m. percent
neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p076 Neighborhood probability of 6 hour total snowfall (surface) above 0.076 m (neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p076)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total snowfall (surface) above 0.076 m. percent
neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p152 Neighborhood probability of 6 hour total snowfall (surface) above 0.152 m (neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p152)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total snowfall (surface) above 0.152 m. percent
neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p304 Neighborhood probability of 6 hour total snowfall (surface) above 0.304 m (neighborhood_probability_of_total_snowfall_6_hour_surface_above_0p304)Threshold applies to the preceding 6 hours of accumulation. Published every 3 forecast hours from lead 6 hours. Neighborhood probability of 6 hour total snowfall (surface) above 0.304 m. percent
probability_matched_mean_total_precipitation_3_hour_surface Probability-matched mean of total precipitation (probability_matched_mean_total_precipitation_3_hour_surface)Accumulated over the preceding 3 hours. Published every 3 forecast hours from lead 3 hours. kg m-2
snowfall_water_equivalent_3_hour_surface Snowfall water equivalent (sf)Accumulated over the preceding 3 hours. Published every 3 forecast hours from lead 3 hours. · dimensions: init_time × statistic × lead_time × y × x kg m-2
total_precipitation_3_hour_surface Total precipitation (tp)Accumulated over the preceding 3 hours. Published every 3 forecast hours from lead 3 hours. · dimensions: init_time × statistic × lead_time × y × x kg m-2
total_precipitation_6_hour_surface Total precipitation (tp)Accumulated over the preceding 6 hours. Published every 3 forecast hours from lead 6 hours. · dimensions: init_time × statistic × lead_time × y × x kg m-2
total_snowfall_12_hour_surface Total snowfall (asnow)Accumulated over the preceding 12 hours. Published every 3 forecast hours from lead 12 hours. · dimensions: init_time × statistic × lead_time × y × x m
total_snowfall_24_hour_surface Total snowfall (asnow)Accumulated over the preceding 24 hours. Published every 3 forecast hours from lead 24 hours. · dimensions: init_time × statistic × lead_time × y × x m
total_snowfall_3_hour_surface Total snowfall (asnow)Accumulated over the preceding 3 hours. Published every 3 forecast hours from lead 3 hours. · dimensions: init_time × statistic × lead_time × y × x m
total_snowfall_6_hour_surface Total snowfall (asnow)Accumulated over the preceding 6 hours. Published every 3 forecast hours from lead 6 hours. · dimensions: init_time × statistic × lead_time × y × x m

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Details

License

Dataset licensed under CC BY 4.0.

Attribution and citation

NOAA NWS NCEP REFS data processed by dynamical.org from NOAA Open Data Dissemination archives.

Or NOAA REFS from dynamical.org.

DOI

Source

The source grib files this archive is constructed from are provided by NOAA Open Data Dissemination (NODD) and accessed from the AWS Open Data Registry.

Storage

Storage for this dataset is generously provided by AWS Open Data.

Chunks

This dataset is stored in Zarr format, which splits each variable into a grid of chunks — the smallest unit read from storage. When possible, aligning your reads with this dataset's chunk grid can significantly improve data access speed.

The element count and coordinate span of this dataset:

dimension chunk
init_time 1 (6 hours)
statistic 1
lead_time 1 (3 hours)
y 1059 (3177 km)
x 1799 (5397 km)
uncompressed 14.5 MiB

Validation report

Review the validation report for variable availability, missing data, known quirks, fill values, value distributions, and sample plots.

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2026-10-08