| ID |
noaa-rrfs-forecast-18-hour-virtual
|
| Spatial domain | Continental United States |
| Spatial resolution | 3 km |
| Time domain | Forecasts initialized 2026-08-14 00:00:00 UTC to Present |
| Time resolution | Forecasts initialized every 3 hours |
| Forecast domain | Forecast lead time 0-18 hours ahead |
| Forecast resolution | Hourly |
STAC (browse) · validation report
The Rapid Refresh Forecast System (RRFS) is a National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Prediction (NCEP) convection-allowing weather forecast model with a 3 km grid, built on the Unified Forecast System. The RRFS ensemble (RRFS ENS) adds five perturbed members to this deterministic forecast, and REFS combines both with HRRR into ensemble products.
NOAA RRFS 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 RRFS forecasts, 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 hourly along the lead_time dimension out to 18 hours.
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.
Variables on pressure levels, fixed heights above mean sea level and soil depths live in the pressure_level, height_above_mean_sea_level and depth_below_ground groups.
Note: dynamical-catalog>=1.0.1 and gribberish>=1.8.4 (or zarr>=3.2 icechunk>=2.0 gribberish>=1.8.4) are required.
| 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-rrfs-forecast-18-hour-virtual", chunks=None)
ds["temperature_2m"].sel(init_time="2026-09-16T12", lead_time="12h")
# Variables with a vertical dimension live in the pressure_level,
# height_above_mean_sea_level and depth_below_ground groups
ds_pressure = dynamical_catalog.open("noaa-rrfs-forecast-18-hour-virtual", group="pressure_level", chunks=None)
ds_pressure["temperature"].sel(init_time="2026-09-16T12", lead_time="12h", pressure_level=500)
import dynamical_catalog # dynamical-catalog>=1.0.1
ds = dynamical_catalog.open("noaa-rrfs-forecast-18-hour-virtual", chunks=None)
ds["temperature_2m"].sel(init_time="2026-09-16T12", lead_time="12h")
# Variables with a vertical dimension live in the pressure_level,
# height_above_mean_sea_level and depth_below_ground groups
ds_pressure = dynamical_catalog.open("noaa-rrfs-forecast-18-hour-virtual", group="pressure_level", chunks=None)
ds_pressure["temperature"].sel(init_time="2026-09-16T12", lead_time="12h", pressure_level=500)
import icechunk
import pystac
import xarray as xr
catalog = pystac.Catalog.from_file("https://stac.dynamical.org/catalog.json")
collection = catalog.get_child("noaa-rrfs-forecast-18-hour-virtual")
asset = collection.assets["icechunk-https"]
authorize = icechunk.containers_credentials({"s3://noaa-rrfs-ops-pds/": icechunk.s3_anonymous_credentials()})
repo = icechunk.Repository.open(
icechunk.http_storage(asset.href),
authorize_virtual_chunk_access=authorize,
)
session = repo.readonly_session("main")
ds = xr.open_zarr(session.store, chunks=None)
ds["temperature_2m"].sel(init_time="2026-09-16T12", lead_time="12h")
# Variables with a vertical dimension live in the pressure_level,
# height_above_mean_sea_level and depth_below_ground groups
ds_pressure = xr.open_zarr(session.store, group="pressure_level", chunks=None)
ds_pressure["temperature"].sel(init_time="2026-09-16T12", lead_time="12h", pressure_level=500)
import icechunk
import pystac
import xarray as xr
catalog = pystac.Catalog.from_file("https://stac.dynamical.org/catalog.json")
collection = catalog.get_child("noaa-rrfs-forecast-18-hour-virtual")
asset = collection.assets["icechunk-https"]
authorize = icechunk.containers_credentials({"s3://noaa-rrfs-ops-pds/": icechunk.s3_anonymous_credentials()})
repo = icechunk.Repository.open(
icechunk.http_storage(asset.href),
authorize_virtual_chunk_access=authorize,
)
session = repo.readonly_session("main")
ds = xr.open_zarr(session.store, chunks=None)
ds["temperature_2m"].sel(init_time="2026-09-16T12", lead_time="12h")
# Variables with a vertical dimension live in the pressure_level,
# height_above_mean_sea_level and depth_below_ground groups
ds_pressure = xr.open_zarr(session.store, group="pressure_level", chunks=None)
ds_pressure["temperature"].sel(init_time="2026-09-16T12", lead_time="12h", pressure_level=500)
| min | max | units | |
|---|---|---|---|
| init_time | 2026-08-14T00:00:00Z | Present | seconds since 1970-01-01 |
| lead_time | 0 | 64800 | seconds |
| x | -2697520.143 | 2696479.857 | m |
| y | -1587306.153 | 1586693.847 | m |
| depth_below_ground | 0 | 3 | m |
| height_above_mean_sea_level | 305 | 4572 | m |
| pressure_level | 2 | 1000 | hPa |
Access a variable by its name (the bold identifier, e.g. ds["aerosol_emission_flux_atmosphere_dust_dry_below_10um"]).
Dimensions: init_time × lead_time × y × x
| variable | units |
|---|---|
aerosol_emission_flux_atmosphere_dust_dry_below_10um
Aerosol emission flux (aemflx)Dry dust aerosol with particle diameter below 10 micrometres.
|
kg m-2 s-1 |
aerosol_emission_flux_atmosphere_particulate_organic_matter_dry_below_2p5um
Aerosol emission flux (aemflx)Dry particulate organic matter aerosol with particle diameter below 2.5 micrometres.
|
kg m-2 s-1 |
aerosol_optical_thickness_atmosphere
Aerosol optical thickness (aotk)
|
1 |
albedo_surface
Forecast albedo (fal)NaN over water.
|
percent |
average_mass_density_8m_total_aerosol_below_10um
Mass density (mdens)Total aerosol with particle diameter below 10 micrometres. Averaged over the preceding hour.
|
kg m-3 |
average_mass_density_8m_total_aerosol_below_2p5um
Mass density (mdens)Total aerosol with particle diameter below 2.5 micrometres. Averaged over the preceding hour.
|
kg m-3 |
best_4_layer_lifted_index_180_0mb
Best (4-layer) lifted index (4lftx)The 180-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
K |
brightness_temperature_goes_16_band_10
Simulated brightness temperature for ABI GOES-16, band 10 (sbta1610)
|
K |
brightness_temperature_goes_16_band_11
Simulated brightness temperature for ABI GOES-16, band 11 (sbta1611)
|
K |
brightness_temperature_goes_16_band_12
Simulated brightness temperature for ABI GOES-16, band 12 (sbta1612)
|
K |
brightness_temperature_goes_16_band_13
Simulated brightness temperature for ABI GOES-16, band 13 (sbta1613)
|
K |
brightness_temperature_goes_16_band_14
Simulated brightness temperature for ABI GOES-16, band 14 (sbta1614)
|
K |
brightness_temperature_goes_16_band_15
Simulated brightness temperature for ABI GOES-16, band 15 (sbta1615)
|
K |
brightness_temperature_goes_16_band_16
Simulated brightness temperature for ABI GOES-16, band 16 (sbta1616)
|
K |
brightness_temperature_goes_16_band_7
Simulated brightness temperature for ABI GOES-16, band 7 (sbta167)
|
K |
brightness_temperature_goes_16_band_8
Simulated brightness temperature for ABI GOES-16, band 8 (sbta168)
|
K |
brightness_temperature_goes_16_band_9
Simulated brightness temperature for ABI GOES-16, band 9 (sbta169)
|
K |
brightness_temperature_goes_18_band_10
Simulated brightness temperature for ABI GOES-18, band 10 (sbta1810)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_11
Simulated brightness temperature for ABI GOES-18, band 11 (sbta1811)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_12
Simulated brightness temperature for ABI GOES-18, band 12 (sbta1812)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_13
Simulated brightness temperature for ABI GOES-18, band 13 (sbta1813)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_14
Simulated brightness temperature for ABI GOES-18, band 14 (sbta1814)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_15
Simulated brightness temperature for ABI GOES-18, band 15 (sbta1815)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_16
Simulated brightness temperature for ABI GOES-18, band 16 (sbta1816)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_8
Simulated brightness temperature for ABI GOES-18, band 8 (sbta188)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_goes_18_band_9
Simulated brightness temperature for ABI GOES-18, band 9 (sbta189)NaN outside GOES-West's coverage.
|
K |
brightness_temperature_top_of_atmosphere
Brightness temperature (btmp)
|
K |
categorical_freezing_rain_surface
Categorical freezing rain (cfrzr)0=no; 1=yes
|
1 |
categorical_ice_pellets_surface
Categorical ice pellets (cicep)0=no; 1=yes
|
1 |
categorical_precipitation_exceeding_100_year_average_recurrence_interval_run_total_surface
Precipitation exceeding 100-year average recurrence interval (qpfari)Binary exceedance of the forecast initialization to the selected lead precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance. Computed only at forecast leads 1, 3, 6, 12 and 24 hours.
|
1 |
categorical_precipitation_exceeding_100_year_average_recurrence_interval_surface
Precipitation exceeding 100-year average recurrence interval (qpfari)Binary exceedance of the preceding hour precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance.
|
1 |
categorical_precipitation_exceeding_10_year_average_recurrence_interval_run_total_surface
Precipitation exceeding 10-year average recurrence interval (qpfari)Binary exceedance of the forecast initialization to the selected lead precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance. Computed only at forecast leads 1, 3, 6, 12 and 24 hours.
|
1 |
categorical_precipitation_exceeding_10_year_average_recurrence_interval_surface
Precipitation exceeding 10-year average recurrence interval (qpfari)Binary exceedance of the preceding hour precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance.
|
1 |
categorical_precipitation_exceeding_2_year_average_recurrence_interval_run_total_surface
Precipitation exceeding 2-year average recurrence interval (qpfari)Binary exceedance of the forecast initialization to the selected lead precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance. Computed only at forecast leads 1, 3, 6, 12 and 24 hours.
|
1 |
categorical_precipitation_exceeding_2_year_average_recurrence_interval_surface
Precipitation exceeding 2-year average recurrence interval (qpfari)Binary exceedance of the preceding hour precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance.
|
1 |
categorical_precipitation_exceeding_5_year_average_recurrence_interval_run_total_surface
Precipitation exceeding 5-year average recurrence interval (qpfari)Binary exceedance of the forecast initialization to the selected lead precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance. Computed only at forecast leads 1, 3, 6, 12 and 24 hours.
|
1 |
categorical_precipitation_exceeding_5_year_average_recurrence_interval_surface
Precipitation exceeding 5-year average recurrence interval (qpfari)Binary exceedance of the preceding hour precipitation against the corresponding grid-cell threshold. Zero also means guidance is unavailable; it cannot be distinguished from no exceedance.
|
1 |
categorical_rain_surface
Categorical rain (crain)0=no; 1=yes
|
1 |
categorical_snow_surface
Categorical snow (csnow)0=no; 1=yes
|
1 |
clear_sky_downward_solar_flux_surface
Clear Sky Downward Solar Flux (csdsf)
|
W m-2 |
cloud_ceiling_height
Ceiling (ceil)Height above mean sea level, not above ground. NaN where no cloud ceiling was detected.
|
m |
column_integrated_mass_density_atmosphere_dust_dry_below_10um
Column-integrated mass density (colmd)Dry dust aerosol with particle diameter below 10 micrometres.
|
kg m-2 |
column_integrated_mass_density_atmosphere_dust_dry_below_2p5um
Column-integrated mass density (colmd)Dry dust aerosol with particle diameter below 2.5 micrometres.
|
kg m-2 |
column_integrated_mass_density_atmosphere_dust_dry_from_2p5_to_10um
Column-integrated mass density (colmd)Dry dust aerosol with particle diameter at least 2.5 micrometres and below 10 micrometres.
|
kg m-2 |
column_integrated_mass_density_atmosphere_particulate_organic_matter_dry_below_2p5um
Column-integrated mass density (colmd)Dry particulate organic matter aerosol with particle diameter below 2.5 micrometres.
|
kg m-2 |
column_integrated_soil_moisture_0m_underground
Column-integrated soil water (cisoilw)NaN over water.
|
kg m-2 |
composite_reflectivity
Maximum/Composite radar reflectivity (refc)No echo is stored as -20 dBZ.
|
dBZ |
convective_available_potential_energy_0_3000m
Convective available potential energy (cape)
|
J kg-1 |
convective_available_potential_energy_180_0mb
Convective available potential energy (cape)The 180-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
J kg-1 |
convective_available_potential_energy_255_0mb
Convective available potential energy (cape)Most unstable parcel searched in the lowest 300 hPa. The 255-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
J kg-1 |
convective_available_potential_energy_90_0mb
Convective available potential energy (cape)The 90-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
J kg-1 |
convective_available_potential_energy_surface
Convective available potential energy (cape)
|
J kg-1 |
convective_inhibition_180_0mb
Convective inhibition (cin)The 180-0 mb in the name are pressure differences from the surface, not isobaric levels. Negative where there is inhibition and at or near zero where there is none.
|
J kg-1 |
convective_inhibition_255_0mb
Convective inhibition (cin)Most unstable parcel searched in the lowest 300 hPa. The 255-0 mb in the name are pressure differences from the surface, not isobaric levels. Negative where there is inhibition and at or near zero where there is none.
|
J kg-1 |
convective_inhibition_90_0mb
Convective inhibition (cin)The 90-0 mb in the name are pressure differences from the surface, not isobaric levels. Negative where there is inhibition and at or near zero where there is none.
|
J kg-1 |
convective_inhibition_surface
Convective inhibition (cin)Negative where there is inhibition and at or near zero where there is none.
|
J kg-1 |
critical_angle_0_500m
Critical angle (cangle)
|
degree |
derived_radar_reflectivity_1000m
Derived radar reflectivity (refd)-20 dBZ is the source's no-echo floor: those cells mean no echo was detected, not a measured value.
|
dBZ |
derived_radar_reflectivity_263k
Derived radar reflectivity (refd)-20 dBZ is the source's no-echo floor: those cells mean no echo was detected, not a measured value.
|
dBZ |
derived_radar_reflectivity_4000m
Derived radar reflectivity (refd)-20 dBZ is the source's no-echo floor: those cells mean no echo was detected, not a measured value.
|
dBZ |
dew_point_depression_2m
Dew point depression (or deficit) (depr)
|
K |
dew_point_temperature_2m
2 metre dewpoint temperature (2d)
|
degree_Celsius |
dew_point_temperature_30_0mb
Dew point temperature (dpt)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
degree_Celsius |
direct_evaporation_cease_soil_moisture_surface
Direct evaporation cease (soil moisture) (smdry)NaN over water.
|
1 |
downdraft_convective_available_potential_energy_400_0mb
Downdraft convective available potential energy (dcape)The 400-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
J kg-1 |
downward_long_wave_radiation_flux_surface
Surface downward long-wave radiation flux (sdlwrf)Averaged over the preceding hour.
|
W m-2 |
downward_short_wave_radiation_flux_surface
Surface downward short-wave radiation flux (sdswrf)Averaged over the preceding hour.
|
W m-2 |
drag_coefficient_surface
Drag coefficient (cd)Zero where the 10 m wind speed used to compute it is 1 m s-1 or less; zero does not imply zero surface friction.
|
1 |
echo_top
Echo top (retop)NaN where no radar echo was detected.
|
m |
effective_layer_helicity_surface
Effective layer helicity (efhl)
|
m2 s-2 |
effective_layer_shear_u_level_of_free_convection
Effective layer U shear (uesh)Shear along the model grid's x dimension, not eastward shear. Zero may mean no effective inflow layer or valid zero shear.
|
m s-1 |
effective_layer_shear_v_level_of_free_convection
Effective layer V shear (vesh)Shear along the model grid's y dimension, not northward shear. Zero may mean no effective inflow layer or valid zero shear.
|
m s-1 |
effective_layer_storm_motion_u_level_of_free_convection
Effective layer U storm motion (ueid)The Bunkers right-moving supercell motion for the effective inflow layer. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
effective_layer_storm_motion_v_level_of_free_convection
Effective layer V storm motion (veid)The Bunkers right-moving supercell motion for the effective inflow layer. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
equilibrium_level_temperature_equilibrium_level
Equilibrium level temperature (elmelt)Where no equilibrium level exists the source reports near-surface temperature rather than a missing value. Mask where convective_available_potential_energy_255_0mb is 0.
|
degree_Celsius |
exchange_coefficient_surface
Exchange coefficient (sfexc)NaN over water.
|
kg m-2 s-1 |
fire_radiative_power_surface
Wildfire radiative power (frpfire)
|
W |
freezing_rain_run_total_surface
Freezing Rain (frzr)Accumulated from the forecast initialization time to this step.
|
kg m-2 |
freezing_rain_surface
Freezing Rain (frzr)Accumulated over the preceding hour.
|
kg m-2 |
friction_velocity_surface
Friction velocity (zust)
|
m s-1 |
frozen_precipitation_run_total_surface
Graupel (snow pellets) precipitation (tgrp)Accumulated from the forecast initialization time to this step.
|
kg m-2 |
frozen_precipitation_surface
Graupel (snow pellets) precipitation (tgrp)Accumulated over the preceding hour.
|
kg m-2 |
geopotential_height_0c_isotherm
Geopotential height (gh)Where the freezing level is below ground, values are below the surface height rather than NaN.
|
m |
geopotential_height_253k
Geopotential height (gh)
|
m |
geopotential_height_cloud_base
Geopotential height (gh)NaN where no cloud was detected.
|
m |
geopotential_height_cloud_ceiling
Geopotential height (gh)NaN where no cloud ceiling was detected.
|
m |
geopotential_height_cloud_top
Geopotential height (gh)NaN where no cloud top was detected.
|
m |
geopotential_height_equilibrium_level
Geopotential height (gh)Where no equilibrium level exists the source reports terrain height plus about 20 m rather than a missing value. Mask by convective available potential energy, which is 0 at those points.
|
m |
geopotential_height_highest_tropospheric_freezing_level
Geopotential height (gh)Where the freezing level is below ground, values are below the surface height rather than NaN.
|
m |
geopotential_height_max_wind
Geopotential height (gh)The source searches only 500 to 100 hPa for this level, so stronger wind can lie outside that layer.
|
m |
geopotential_height_supercooled_liquid_water_base
Geopotential height (gh)NaN where no supercooled liquid water layer was detected.
|
m |
geopotential_height_supercooled_liquid_water_top
Geopotential height (gh)NaN where no supercooled liquid water layer was detected.
|
m |
geopotential_height_surface
Geopotential height (gh)
|
m |
geopotential_height_tropopause
Geopotential height (gh)
|
m |
geopotential_height_wet_bulb_zero
Geopotential height (gh)
|
m |
ground_heat_flux_surface
Ground heat flux (gflux)NaN over open water. Averaged over the preceding hour.
|
W m-2 |
height_above_ground_adiabatic_condensation_level
Geometric height of adiabatic condensation level above ground (hacg)
|
m |
high_cloud_cover
High cloud cover (hcc)
|
percent |
horizontal_moisture_convergence_30_0mb
Horizontal moisture convergence (mconv)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
s-1 |
horizontal_moisture_convergence_850mb
Horizontal moisture convergence (mconv)
|
s-1 |
horizontal_moisture_convergence_950mb
Horizontal moisture convergence (mconv)
|
s-1 |
horizontal_moisture_convergence_atmosphere
Horizontal moisture convergence (mconv)Column-integrated horizontal moisture convergence.
|
kg m-2 s-1 |
hourly_maximum_radar_reflectivity_1000m
Hourly maximum of simulated reflectivity (maxref)-35 dBZ where the hourly maximum did not exceed about -20 dBZ. Maximum value over the preceding hour.
|
dBZ |
ice_cover_surface
Ice concentration (icec)
|
1 |
ice_growth_rate_10m_amsl
Ice growth rate (iceg)Rate of marine icing accretion on a vessel superstructure.
|
m s-1 |
instantaneous_downward_long_wave_radiation_flux_surface
Surface downward long-wave radiation flux (sdlwrf)
|
W m-2 |
instantaneous_downward_short_wave_radiation_flux_surface
Surface downward short-wave radiation flux (sdswrf)
|
W m-2 |
instantaneous_ground_heat_flux_surface
Ground heat flux (gflux)NaN over water.
|
W m-2 |
instantaneous_latent_heat_flux_surface
Latent heat flux (lhf)
|
W m-2 |
instantaneous_sensible_heat_flux_surface
Sensible heat flux (shf)
|
W m-2 |
instantaneous_total_cloud_cover_atmosphere
Total cloud cover (tcc)
|
percent |
instantaneous_upward_long_wave_radiation_flux_surface
Surface upward long-wave radiation flux (sulwrf)
|
W m-2 |
instantaneous_upward_short_wave_radiation_flux_surface
Surface upward short-wave radiation flux (suswrf)
|
W m-2 |
land_sea_mask_surface
Land-sea mask (lsm)
|
1 |
latent_heat_flux_surface
Latent heat flux (lhf)Averaged over the preceding hour.
|
W m-2 |
layer_thickness_261k_256k
Layer Thickness (layth)Depth between the model levels where the temperature first reaches -12 °C and -17 °C, so values step by model layer depth. Zero where either level is not found.
|
m |
leaf_area_index_surface
Leaf Area Index (lai)
|
1 |
low_cloud_cover
Low cloud cover (lcc)
|
percent |
mass_density_8m_dust_dry_below_2p5um
Mass density (mdens)Dry dust aerosol with particle diameter below 2.5 micrometres.
|
kg m-3 |
mass_density_8m_dust_dry_from_2p5_to_10um
Mass density (mdens)Dry dust aerosol with particle diameter at least 2.5 micrometres and below 10 micrometres.
|
kg m-3 |
mass_density_8m_particulate_organic_matter_dry_below_2p5um
Mass density (mdens)Dry particulate organic matter aerosol with particle diameter below 2.5 micrometres.
|
kg m-3 |
mass_density_height_atmosphere
Height of aerosol mass density (hgtmd)NaN where no aerosol layer was diagnosed.
|
m |
mass_density_height_base
Height of aerosol mass density (hgtmd)Lowest level at which aerosol mass density exceeds 1e-9 kg m-3. NaN where no level exceeds that threshold.
|
m |
mass_density_height_top
Height of aerosol mass density (hgtmd)Highest level at which aerosol mass density exceeds 1e-9 kg m-3. NaN where no level exceeds that threshold.
|
m |
mass_grid_levels_surface
Number of mass grid levels (lmh)
|
1 |
maximum_derived_radar_reflectivity_263k
Derived radar reflectivity (refd)-35 dBZ where the hourly maximum did not exceed about -20 dBZ, including where the column had no 263 K level throughout the hour. Maximum value over the preceding hour.
|
dBZ |
maximum_downward_vertical_velocity_100_1000mb
Maximum downward vertical velocity (maxdvv)In the 100-1000 hPa isobaric layer. Maximum value over the preceding hour.
|
m s-1 |
maximum_hail_diameter_surface
Hail (hail)Maximum value over the preceding hour.
|
m |
maximum_lightning_atmosphere
Lightning (ltng)Maximum value over the preceding hour.
|
1 |
maximum_lightning_threat_1m
Maximum lightning threat 1 (graupel flux) (ltngsd)GSD maximum lightning threat 1 derived from upward graupel flux, in flashes km-2 (5 min)-1. Encoded in GRIB as LTNGSD (lightning strike density) at the pseudo-level 1 m above ground. Maximum value over the preceding hour.
|
1 |
maximum_lightning_threat_2m
Maximum lightning threat 2 (vertically integrated ice) (ltngsd)GSD maximum lightning threat 2 derived from vertically integrated ice, in flashes km-2 (5 min)-1. Encoded in GRIB as LTNGSD (lightning strike density) at the pseudo-level 2 m above ground. Maximum value over the preceding hour.
|
1 |
maximum_precipitation_rate_surface
Precipitation rate (prate)Maximum value over the preceding hour.
|
kg m-2 s-1 |
maximum_relative_humidity_2m
Time-maximum 2 metre relative humidity (max_2r)Maximum value over the preceding hour.
|
percent |
maximum_relative_vorticity_1000_0m
Vorticity (relative) (vo)Maximum value over the preceding hour.
|
s-1 |
maximum_relative_vorticity_1_hybrid_level
Vorticity (relative) (vo)Maximum value over the preceding hour.
|
s-1 |
maximum_relative_vorticity_2000_0m
Vorticity (relative) (vo)Maximum value over the preceding hour.
|
s-1 |
maximum_snow_albedo_surface
Maximum snow albedo (mxsalb)NaN over water.
|
percent |
maximum_temperature_2m
Maximum temperature (tmax)Maximum value over the preceding hour.
|
degree_Celsius |
maximum_updraft_helicity_3000_0m
Updraft Helicity (uphl)Maximum value over the preceding hour.
|
m2 s-2 |
maximum_updraft_helicity_5000_2000m
Updraft Helicity (uphl)Maximum value over the preceding hour.
|
m2 s-2 |
maximum_upward_vertical_velocity_100_1000mb
Maximum upward vertical velocity (maxuvv)In the 100-1000 hPa isobaric layer. Maximum value over the preceding hour.
|
m s-1 |
maximum_wind_speed_10m
Time-maximum 10 metre wind speed (max_10si)Maximum value over the preceding hour.
|
m s-1 |
maximum_wind_u_component_10m
Maximum 10 metre wind speed u component (maxuw)Velocity along the model grid's x dimension, not eastward velocity. Maximum value over the preceding hour.
|
m s-1 |
maximum_wind_v_component_10m
Maximum 10 metre wind speed v component (maxvw)Velocity along the model grid's y dimension, not northward velocity. Maximum value over the preceding hour.
|
m s-1 |
medium_cloud_cover
Medium cloud cover (mcc)
|
percent |
minimal_stomatal_resistance_surface
Minimal stomatal resistance (rsmin)NaN over water, including inland water bodies.
|
s m-1 |
minimum_relative_humidity_2m
Time-minimum 2 metre relative humidity (min_2r)Minimum value over the preceding hour.
|
percent |
minimum_temperature_2m
Minimum temperature (tmin)Minimum value over the preceding hour.
|
degree_Celsius |
minimum_updraft_helicity_3000_0m
Minimum updraft helicity (mnuphl)Minimum value over the preceding hour.
|
m2 s-2 |
minimum_updraft_helicity_5000_2000m
Minimum updraft helicity (mnuphl)Minimum value over the preceding hour.
|
m2 s-2 |
moisture_availability_0m_underground
Moisture availability (mstav)
|
percent |
new_snow_density_surface
Snow density (rsn)Diagnosed density of newly falling snow from a snow-to-liquid ratio, independent of snow on the ground. NaN where the air 300 m above ground is 5 °C or warmer.
|
kg m-3 |
number_of_soil_layers_in_root_zone_surface
Number of soil layers in root zone (rlyrs)Zero over water, including inland water bodies, where this count does not apply. Zero may also be a valid layer count and is not masked.
|
1 |
parcel_lifted_index_30_0mb
Parcel lifted index (to 500 hPa) (pli)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
K |
percent_frozen_precipitation_surface
Percent frozen precipitation (cpofp)NaN where precipitation is absent or too light to diagnose a frozen fraction.
|
percent |
planetary_boundary_layer_height_surface
Boundary layer height (blh)
|
m |
plant_canopy_surface_water_surface
Plant canopy surface water (cnwat)NaN over water.
|
kg m-2 |
potential_temperature_30_0mb
Potential temperature (pt)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
K |
potential_temperature_surface
Potential temperature (pt)
|
K |
potential_temperature_tropopause
Potential temperature (pt)
|
K |
precipitable_water_30_0mb
Precipitable water (pwat)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
kg m-2 |
precipitable_water_atmosphere
Precipitable water (pwat)
|
kg m-2 |
precipitation_rate_surface
Precipitation rate (prate)
|
kg m-2 s-1 |
pressure_0c_isotherm
Pressure (pres)Where the freezing level is below ground, values can exceed surface pressure.
|
Pa |
pressure_120_90mb
Pressure (pres)The 120-90 mb in the name are pressure differences from the surface, not isobaric levels.
|
Pa |
pressure_150_120mb
Pressure (pres)The 150-120 mb in the name are pressure differences from the surface, not isobaric levels.
|
Pa |
pressure_180_150mb
Pressure (pres)The 180-150 mb in the name are pressure differences from the surface, not isobaric levels.
|
Pa |
pressure_30_0mb
Pressure (pres)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
Pa |
pressure_60_30mb
Pressure (pres)The 60-30 mb in the name are pressure differences from the surface, not isobaric levels.
|
Pa |
pressure_80m
80 metre pressure (80sp)
|
Pa |
pressure_90_60mb
Pressure (pres)The 90-60 mb in the name are pressure differences from the surface, not isobaric levels.
|
Pa |
pressure_adiabatic_condensation_level
Pressure (pres)
|
Pa |
pressure_cloud_base
Pressure (pres)NaN where no cloud was detected.
|
Pa |
pressure_cloud_top
Pressure (pres)NaN where no cloud top was detected.
|
Pa |
pressure_grid_scale_cloud_bottom_level
Pressure (pres)NaN where no cloud bottom was detected.
|
Pa |
pressure_highest_tropospheric_freezing_level
Pressure (pres)Where the freezing level is below ground, values can exceed surface pressure.
|
Pa |
pressure_max_wind
Pressure (pres)The source searches only 500 to 100 hPa for this level, so stronger wind can lie outside that layer.
|
Pa |
pressure_of_lifted_parcel_level_255_0mb
Pressure of level from which parcel was lifted (plpl)Most unstable parcel searched in the lowest 300 hPa. The 255-0 mb in the name are pressure differences from the surface, not isobaric levels. Values are capped at 99999 Pa.
|
Pa |
pressure_reduced_to_mean_sea_level
Pressure reduced to MSL (prmsl)
|
Pa |
pressure_surface
Surface pressure (sp)
|
Pa |
pressure_top_of_atmosphere
Pressure (pres)
|
Pa |
pressure_tropopause
Pressure (pres)
|
Pa |
relative_humidity_0c_isotherm
Relative humidity (r)
|
percent |
relative_humidity_120_90mb
Relative humidity (r)The 120-90 mb in the name are pressure differences from the surface, not isobaric levels.
|
percent |
relative_humidity_150_120mb
Relative humidity (r)The 150-120 mb in the name are pressure differences from the surface, not isobaric levels.
|
percent |
relative_humidity_180_150mb
Relative humidity (r)The 180-150 mb in the name are pressure differences from the surface, not isobaric levels.
|
percent |
relative_humidity_2m
2 metre relative humidity (2r)
|
percent |
relative_humidity_30_0mb
Relative humidity (r)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
percent |
relative_humidity_60_30mb
Relative humidity (r)The 60-30 mb in the name are pressure differences from the surface, not isobaric levels.
|
percent |
relative_humidity_90_60mb
Relative humidity (r)The 90-60 mb in the name are pressure differences from the surface, not isobaric levels.
|
percent |
relative_humidity_highest_tropospheric_freezing_level
Relative humidity (r)
|
percent |
relative_humidity_with_respect_to_precipitable_water_atmosphere
Relative humidity with respect to precipitable water (rhpw)
|
percent |
sensible_heat_flux_surface
Sensible heat flux (shf)Averaged over the preceding hour.
|
W m-2 |
snow_area_fraction_surface
Snow cover (snowc)NaN over water.
|
1 |
snow_melt_surface
Snowmelt (snom)Accumulated over the preceding hour.
|
kg m-2 |
snow_phase_change_heat_flux_surface
Snow phase change heat flux (snohf)NaN over water. Averaged over the preceding hour.
|
W m-2 |
snow_thickness_surface
Snow depth (sde)NaN over water.
|
m |
snow_water_equivalent_surface
Snow depth water equivalent (sd)NaN over water.
|
m |
soil_porosity_surface
Soil porosity (poros)NaN over water.
|
1 |
soil_type_surface
Soil type (slt)STATSGO soil classes used by the RUC land surface model.
|
1 |
source_latitude_surface
Latitude (-90 to +90) (nlat)
|
degree_north |
source_longitude_surface
East Longitude (0 - 360) (elon)
|
degree_east |
specific_humidity_120_90mb
Specific humidity (q)The 120-90 mb in the name are pressure differences from the surface, not isobaric levels.
|
1 |
specific_humidity_150_120mb
Specific humidity (q)The 150-120 mb in the name are pressure differences from the surface, not isobaric levels.
|
1 |
specific_humidity_180_150mb
Specific humidity (q)The 180-150 mb in the name are pressure differences from the surface, not isobaric levels.
|
1 |
specific_humidity_2m
Specific humidity (q)
|
1 |
specific_humidity_305m_above_mean_sea_level
Specific humidity (q)NaN where this height is below the terrain.
|
1 |
specific_humidity_30_0mb
Specific humidity (q)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
1 |
specific_humidity_60_30mb
Specific humidity (q)The 60-30 mb in the name are pressure differences from the surface, not isobaric levels.
|
1 |
specific_humidity_80m
Specific humidity (q)
|
1 |
specific_humidity_90_60mb
Specific humidity (q)The 90-60 mb in the name are pressure differences from the surface, not isobaric levels.
|
1 |
storm_relative_helicity_1000_0m
Storm relative helicity (hlcy)
|
m2 s-2 |
storm_relative_helicity_3000_0m
Storm relative helicity (hlcy)
|
m2 s-2 |
storm_surface_runoff_surface
Storm surface runoff (ssrun)NaN over water. Accumulated over the preceding hour.
|
kg m-2 |
stream_function_250mb
Stream function (strf)
|
m2 s-1 |
stream_function_500mb
Stream function (strf)
|
m2 s-1 |
sublimation_evaporation_from_snow_surface
Sublimation (evaporation from snow) (sbsno)
|
W m-2 |
surface_roughness_surface
Forecast surface roughness (fsr)
|
m |
temperature_100m
Temperature (t)
|
degree_Celsius |
temperature_120_90mb
Temperature (t)The 120-90 mb in the name are pressure differences from the surface, not isobaric levels.
|
degree_Celsius |
temperature_150_120mb
Temperature (t)The 150-120 mb in the name are pressure differences from the surface, not isobaric levels.
|
degree_Celsius |
temperature_160m
Temperature (t)
|
degree_Celsius |
temperature_180_150mb
Temperature (t)The 180-150 mb in the name are pressure differences from the surface, not isobaric levels.
|
degree_Celsius |
temperature_2m
2 metre temperature (2t)
|
degree_Celsius |
temperature_30_0mb
Temperature (t)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels.
|
degree_Celsius |
temperature_30m
Temperature (t)
|
degree_Celsius |
temperature_320m
Temperature (t)
|
degree_Celsius |
temperature_50m
Temperature (t)
|
degree_Celsius |
temperature_60_30mb
Temperature (t)The 60-30 mb in the name are pressure differences from the surface, not isobaric levels.
|
degree_Celsius |
temperature_80m
80 metre temperature (80t)
|
degree_Celsius |
temperature_90_60mb
Temperature (t)The 90-60 mb in the name are pressure differences from the surface, not isobaric levels.
|
degree_Celsius |
temperature_cloud_top
Temperature (t)NaN where no cloud top was detected.
|
degree_Celsius |
temperature_surface
Skin temperature (skt)
|
degree_Celsius |
temperature_tropopause
Temperature (t)
|
degree_Celsius |
total_cloud_cover_atmosphere
Total cloud cover (tcc)Averaged over the preceding hour.
|
percent |
total_cloud_cover_boundary_layer
Boundary layer cloud cover (tcc)
|
percent |
total_precipitation_run_total_surface
Total precipitation (tp)Accumulated from the forecast initialization time to this step.
|
kg m-2 |
total_precipitation_surface
Total precipitation (tp)Accumulated over the preceding hour.
|
kg m-2 |
total_snow_precipitation_run_total_surface
Total snow precipitation (tsnowp)Accumulated from the forecast initialization time to this step.
|
kg m-2 |
total_snow_precipitation_surface
Total snow precipitation (tsnowp)Accumulated over the preceding hour.
|
kg m-2 |
total_snowfall_run_total_surface
Total snowfall (asnow)Accumulated from the forecast initialization time to this step.
|
m |
transpiration_stress_onset_soil_moisture_surface
Transpiration stress-onset (soil moisture) (smref)NaN over water, including inland water bodies.
|
1 |
u_component_storm_motion_6000_0m
U-component storm motion (ustm)The Bunkers right-moving supercell motion. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
updraft_helicity_5000_2000m
Updraft Helicity (uphl)
|
m2 s-2 |
upward_long_wave_radiation_flux_surface
Surface upward long-wave radiation flux (sulwrf)Averaged over the preceding hour.
|
W m-2 |
upward_long_wave_radiation_flux_top_of_atmosphere
Upward long-wave radiation flux (ulwrf)Averaged over the preceding hour.
|
W m-2 |
upward_short_wave_radiation_flux_surface
Surface upward short-wave radiation flux (suswrf)Averaged over the preceding hour.
|
W m-2 |
upward_short_wave_radiation_flux_top_of_atmosphere
Upward short-wave radiation flux (uswrf)Averaged over the preceding hour.
|
W m-2 |
v_component_storm_motion_6000_0m
V-component storm motion (vstm)The Bunkers right-moving supercell motion. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
vegetation_surface
Vegetation fraction (veg)NaN over water.
|
percent |
vegetation_type_surface
Vegetation Type (vgtyp)Modified IGBP vegetation classes used by the RUC land surface model.
|
1 |
velocity_grid_levels_surface
Number of velocity grid levels (lmv)
|
1 |
ventilation_rate_planetary_boundary_layer
Ventilation Rate (VRATE)
|
m2 s-1 |
vertical_speed_shear_tropopause
Vertical speed shear (vwsh)
|
s-1 |
vertical_u_component_shear_0_6000m
Vertical u-component shear (vucsh)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
vertical_v_component_shear_0_6000m
Vertical v-component shear (vvcsh)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
vertically_integrated_liquid_atmosphere
Vertically-integrated liquid (veril)
|
kg m-2 |
visibility_surface
Visibility (vis)
|
m |
visible_beam_downward_solar_flux_surface
Visible Beam Downward Solar Flux (vbdsf)Downward direct-beam solar flux in the ultraviolet and visible bands at the surface.
|
W m-2 |
visible_diffuse_downward_solar_flux_surface
Visible Diffuse Downward Solar Flux (vddsf)Downward diffuse solar flux in the ultraviolet and visible bands at the surface.
|
W m-2 |
water_temperature_surface
Water temperature (wtmp)NaN over land.
|
degree_Celsius |
wildfire_potential_surface
Wildfire potential (wfirepot)The forecast lead-zero value is an initial-time field with a zero-length averaging window. Averaged over the preceding hour.
|
1 |
wilting_point_surface
Wilting point (wilt)NaN over water, including inland water bodies.
|
1 |
wind_gust_surface
Wind speed (gust) (gust)
|
m s-1 |
wind_u_100m
100 metre U wind component (100u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_10m
10 metre U wind component (10u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_120_90mb
U component of wind (u)The 120-90 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_150_120mb
U component of wind (u)The 150-120 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_160m
U component of wind (u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_180_150mb
U component of wind (u)The 180-150 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_30_0mb
U component of wind (u)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_30m
U component of wind (u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_320m
U component of wind (u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_50m
U component of wind (u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_60_30mb
U component of wind (u)The 60-30 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_80m
80 metre U wind component (80u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_90_60mb
U component of wind (u)The 90-60 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_max_wind
U component of wind (u)The source searches only 500 to 100 hPa for this level, so stronger wind can lie outside that layer. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_planetary_boundary_layer
U component of wind (u)The mean wind through the depth of the planetary boundary layer, not the wind at its top. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_u_tropopause
U component of wind (u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_v_100m
100 metre V wind component (100v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_10m
10 metre V wind component (10v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_120_90mb
V component of wind (v)The 120-90 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_150_120mb
V component of wind (v)The 150-120 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_160m
V component of wind (v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_180_150mb
V component of wind (v)The 180-150 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_30_0mb
V component of wind (v)The 30-0 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_30m
V component of wind (v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_320m
V component of wind (v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_50m
V component of wind (v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_60_30mb
V component of wind (v)The 60-30 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_80m
80 metre V wind component (80v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_90_60mb
V component of wind (v)The 90-60 mb in the name are pressure differences from the surface, not isobaric levels. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_max_wind
V component of wind (v)The source searches only 500 to 100 hPa for this level, so stronger wind can lie outside that layer. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_planetary_boundary_layer
V component of wind (v)The mean wind through the depth of the planetary boundary layer, not the wind at its top. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
wind_v_tropopause
V component of wind (v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
These variables live in the depth_below_ground Zarr group (e.g. pass group="depth_below_ground" to dynamical_catalog.open() or xr.open_zarr()).
Dimensions: init_time × lead_time × y × x × depth_below_ground
| variable | units |
|---|---|
liquid_volumetric_soil_moisture
Liquid volumetric soil moisture (non-frozen) (soill)NaN over water.
|
1 |
soil_temperature
Soil temperature (sot)NaN over water.
|
degree_Celsius |
volumetric_soil_moisture
Volumetric soil moisture content (soilw)NaN over water.
|
1 |
These variables live in the height_above_mean_sea_level Zarr group (e.g. pass group="height_above_mean_sea_level" to dynamical_catalog.open() or xr.open_zarr()).
Dimensions: init_time × lead_time × y × x × height_above_mean_sea_level
| variable | units |
|---|---|
temperature
Temperature (t)NaN where this height is below the terrain.
|
degree_Celsius |
wind_u
U component of wind (u)NaN where this height is below the terrain. Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_v
V component of wind (v)NaN where this height is below the terrain. Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
These variables live in the pressure_level Zarr group (e.g. pass group="pressure_level" to dynamical_catalog.open() or xr.open_zarr()).
Dimensions: init_time × lead_time × y × x × pressure_level
| variable | units |
|---|---|
absolute_vorticity
Absolute vorticity (absv)
|
s-1 |
cloud_ice_mixing_ratio
Cloud ice mixing ratio (cdcimr)
|
kg kg-1 |
cloud_mixing_ratio
Cloud mixing ratio (clwmr)
|
kg kg-1 |
dew_point_temperature
Dew point temperature (dpt)
|
degree_Celsius |
geopotential_height
Geopotential height (gh)
|
m |
graupel
Graupel (snow pellets) (grle)
|
kg kg-1 |
rain_mixing_ratio
Rain mixing ratio (rwmr)
|
kg kg-1 |
relative_humidity
Relative humidity (r)
|
percent |
snow_mixing_ratio
Snow mixing ratio (snmr)
|
kg kg-1 |
specific_humidity
Specific humidity (q)
|
1 |
temperature
Temperature (t)
|
degree_Celsius |
vertical_velocity_geometric
Vertical velocity (geometric) (dzdt)
|
m s-1 |
wind_u
U component of wind (u)Velocity along the model grid's x dimension, not eastward velocity.
|
m s-1 |
wind_v
V component of wind (v)Velocity along the model grid's y dimension, not northward velocity.
|
m s-1 |
Dataset licensed under CC BY 4.0.
NOAA NWS NCEP RRFS data processed by dynamical.org from NOAA Open Data Dissemination archives.
Or NOAA RRFS from dynamical.org.
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 for this dataset is generously provided by AWS Open Data.
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 (3 hours) |
| lead_time | 1 (1 hour) |
| y | 1059 (3177 km) |
| x | 1799 (5397 km) |
| uncompressed | 14.5 MiB |
Review the validation report for variable availability, missing data, known quirks, fill values, value distributions, and sample plots.