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HRRR fam complete, the validation reports you crave
The complete HRRR family is now in the catalog, every dataset has a detailed validation report, and data.dynamical.org access now ends September 30, 2026.
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OMGIMERG, Zarr-Python 3.3.0, analyzing forecast rollouts cont., NVIDIA Earth-2
NASA IMERG Early and Late precipitation analyses join the catalog, Zarr-Python 3.3.0 speeds up sharded reads, we expand our research on forecast dissemination timing, and NVIDIA Earth2Studio adds dynamical.org data sources.
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Low-latency HRRR, with all variables and levels, now in the catalog
A new HRRR lands in the catalog as our first virtual dataset — low-latency and spatial-access optimized — alongside the launch of status.dynamical.org, richer per-dataset validation reports, and a cleaner catalog and site.
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AIFS ENS and validation reports
ECMWF AIFS ENS joins the catalog, we're adding in-depth validation reports to every dataset, and there's a dynamical.org post on the AWS Public Sector Blog.
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Time 2 Chunk (2.0), DWD ICON-EU, status for weather
Zarr v3 is deprecated — migrate to Icechunk by July 23. Meet the new access patterns via dynamical-catalog and STAC, plus the freshly live DWD ICON-EU forecast.
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dynamical.org - icechunk 2.0 upgrade cometh
A quick housekeeping note: Icechunk 2 is out. Update your Python library before April 24 — and note it now requires Python 3.12 or higher.
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Rain, radar, and reckless optimism.
ECMWF's AIFS Single AI forecast and NOAA's MRMS radar join the catalog, we cross 200M monthly requests, and we're testing a dynamical-catalog Python library.
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Warmer temps, datasets heating up.
A heap of updates: a live 21-variable GFS analysis, HRRR analysis extended back to 2014, more variables everywhere, experimental ASOS obs, and a DWD ICON-EU grib archive.
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January cornucopia: AMS | HRRR analysis | more
Find Alden at AMS, dig into the new HRRR analysis, and celebrate full Icechunk catalog parity — now listed on the AWS Registry and Earthmover's Marketplace.
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Preview of dynamical.org Icechunk Zarrs are now listed on the Registry of Open Data on AWS!
Our Icechunk Zarrs are now on the AWS Registry of Open Data — here's why Icechunk, and the two small breaking changes coming with Icechunk 2.0.
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🟢 ECMWF IFS ENS live and updating
The European Centre's IFS ENS forecast is now live and updating in the catalog — because ensembles are so hot right now. Icechunk versions available for testing.
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Wake up, babe. A new zarr just dropped.
HRRR forecasts are live and updating, Icechunk versions are in testing, and we hacked together a simple scorecard for 2m temp and precip.
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🟢 GFS is live
GFS forecasts are live — four years of 16-day hourly forecasts, four times a day. Plus steering committee notes and podcast episode two on Aardvark Weather.
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introducing a new pod; GFS forecasts incoming
We started a podcast. It's called Weathering, and episode one dives into the limits of atmospheric predictability. Also: GFS forecasts are landing imminently.
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GEFS analysis is live!
GEFS analysis is live: 25+ years, live-updating, and designed to pair with the forecast dataset — as satisfying as peeling a citrus in one piece.
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1 Million Requests!
A million requests from 51 countries in GEFS's first week. Here's our Phase 1 dataset slate — and three ways you can help make it happen.
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About GEFS-fing Time & Introducing Our Steering Committee
Our first non-demo release lands: NOAA's GEFS 35-day forecasts, 115TB of live-updating Zarr v3 — and we introduce the steering committee guiding it all.
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Alden @ AMS; GEFS zarrs?!
Catch Alden presenting at AMS with our first fiscal sponsor, Hydro-Québec — and GEFS is almost here, with operational updates going live this week.
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September update
GEFS forecasts are on deck, survey feedback is shaping the roadmap, and we're assembling a steering committee — plus meteorological prose from Huckleberry Finn.
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Let there be zarr: GFS hourly analysis is live
Our very first catalog entry is live: an hourly GFS analysis from 2015 to present, with docs and an example notebook. Testers, fire up your rigs.
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Introducing dynamical.org
Introducing dynamical.org — and over a hundred of you have already signed up to test our first release: a GFS analysis with a long historical record.