NOAA makes the AI GFS family operational (AIGFS, AIGEFS, HGEFS)
NCEP announced operational rollout of AIGFS, AIGEFS, and HGEFS effective Dec 17, 2025 (12Z), delivering GraphCast-based deterministic and ensemble forecasts on NOMADS.
GribStream Blog
Updates on data feeds, model launches, and product releases.
ECMWF IFS Cycle 50r1 upgrade targets early 2026 operations
ECMWF Newsletter 185 details IFS Cycle 50r1, a coupled ocean and sea-ice upgrade with NEMO4-SI3, assimilation changes, and major compute savings, planned for early 2026 operations.
ECMWF opens the full Real-time Catalogue to all users
ECMWF made its entire Real-time Catalogue openly available under CC BY 4.0 starting Oct 1, 2025, expanding access beyond the previous free subset.
URMA and RTMA now available: hourly actuals alongside forecasts
GribStream now serves URMA and RTMA so you can use near-real-time and verified hourly analyses next to your forecasts.
NBM fix restores tropical 10 m wind grids when NHC data are missing
NWS updated NBM tropical wind processing so missing NHC 10 m wind grids are replaced with deterministic 10 m wind fields, starting Sept 2, 2025 at 13Z.
RTMA v2.10.10 minor upgrade adds FAA station KJKA
NWS updated RTMA to v2.10.10 on Aug 26, 2025 (18Z) to add FAA station KJKA to the station list.
LAMP/GLMP v2.7 upgrade adds new flight-category guidance and visibility updates
NWS announced LAMP/GLMP v2.7 effective Sep 16, 2025, adding new flight-category bulletins, updated visibility thresholds, new station guidance, and an Alaska ceiling fix, with an Oct 9 update.
ECMWF AIFS operational and ensemble now on GribStream
AIFS operational and ensemble datasets are live, providing AI-based global forecasts with both deterministic and probabilistic outputs.
NBM percentile thinning proposed for Spring 2026
NWS proposes reducing NBM percentile output to 5th-95th (step of 5) plus min/max, to manage data volume as the blend adds new probabilistic fields.
SREF termination proposal: NOAA suggests GEFS as the replacement
NWS seeks comments on retiring the Short Range Ensemble Forecast System (SREF) and recommends GEFS as the replacement as it transitions to UFS-supported cores.
GEFS aerosol 06/18Z cycle discontinuation proposed for 2026
NWS proposes ending the 06Z/18Z GEFS aerosol component forecasts by April 1, 2026, while keeping the 00Z/12Z aerosol cycles and all non-aerosol GEFS members unchanged.
RRFS and RRFS Ensemble now supported
GribStream now serves NOAA's RRFS deterministic and 5-member ensemble datasets at convection-allowing resolution.
NBM v5.0 proposed for April 2026: major QPF, snow, and AI-input changes
NWS is soliciting comments on a proposed NBM v5.0 upgrade with new QM QPF/PoP, expanded snow products, higher-resolution inputs, and ECMWF AI/IFS input.
ECMWF takes AIFS-ENS operational (ensemble AI forecasts)
ECMWF moved AIFS-ENS into operations on July 1, 2025, running a 51-member AI ensemble alongside the physics-based IFS ensemble.
RRFS proposed to replace NAM, HiresW, HREF, and NARRE in early 2026
NWS proposes retiring several legacy regional models in favor of the Rapid Refresh Forecast System (RRFS) and REFS, with a comment period through July 26, 2025.
Full GEFS ensemble members now available
GribStream now serves all GEFS ensemble members, not just the mean, enabling true probabilistic workflows.
ECMWF IFS ensemble and wave ensemble now available
IFS Enfo and IFS Waef are now on GribStream, providing 51-member ensembles for atmosphere and wave guidance.
ECMWF IFS deterministic wave model now available
GribStream now serves ECMWF IFS Wave deterministic forecasts for global ocean wave conditions.
ECMWF IFS operational now available
GribStream now serves ECMWF IFS Operational (HRES) with 0.25 deg global output and 15-day horizons.
Query forecasts like a database
GribStream expanded into a searchable weather archive with expressions, time-travel queries, and richer demos.
Quickstart guide: expressions, filters, and time-travel queries
A practical quickstart guide now covers tokens, response formats, named locations, time-travel, and expressions.
How to access the GribStream API
A quick FAQ on where to access the API, create a token, and start making requests.
HRRR corn growth simulation demo (PTU + stress modeling)
A new HRRR-driven demo simulates corn growth using PTU, ET0, and stress factors, powered by expression-based queries.
NBM v4.3 upgrade goes live May 20, 2025
NWS announced NBM v4.3 with improved tropical cyclone wind feature-matching and updated SPC probabilistic severe products, effective May 20, 2025 at 12Z.
NBM snow accumulation demo for ski resorts
An NBM-based demo tracks snow and precipitation at ski resorts across North America.
Browse and compare NOAA model data with the demo dashboard
A new embedded dashboard lets you query the API directly, compare models, and explore parameters interactively.
NOAA CFS models now available on GribStream
GribStream now supports the Climate Forecast System (CFS) with PGBF, FLXF, OCNF, and IPVF products back to 2018.
GEFS Chem, Wave Prob, and Atmos Mean now available
GribStream added GEFS Chem, GEFS Wave Prob, and GEFS Atmos Mean datasets for air quality, wave risk, and mean guidance.
Pricing update: Pro plans now include double the quota
GribStream doubled Pro plan quota while keeping prices steady and reduced coordinate bundle sizes for smaller requests.
Query sparse times with timesList
The API now supports timesList so you can request specific timestamps without pulling entire hourly ranges.
HRRR model now available
GribStream added NOAA's HRRR with 3 km resolution, hourly updates, and history back to 2014.
OpenAPI spec and Swagger UI now available
GribStream now provides an OpenAPI spec and Swagger UI so you can generate clients and explore endpoints quickly.
RAP model support and Skew-T examples
GribStream added NOAA RAP support and published a Python Skew-T log-P example.
GribStream: historical weather forecast API
A short overview of GribStream as a SaaS API for historical weather forecasts.
Product ideas and feedback thread
An open thread inviting ideas and feedback on future GribStream features.
Launching on Product Hunt
GribStream launched on Product Hunt and shared the announcement with the community.
API documentation published
GribStream documentation is now live for getting started and exploring endpoints.
GFS model now available
GribStream added the Global Forecast System (GFS) with historical forecasts and a demo viewer.
Introducing GribStream
Introducing GribStream: a fast API for historical weather forecasts with time-travel support and bulk extraction.