AI weather forecasting goes operational
ECMWF’s AIFS (Feb 2025), then NOAA’s AI models (Dec 2025)
Result confirmed
Importance: major (4 of 5)The takeaway
On 25 Feb 2025 the European Centre for Medium-Range Weather Forecasts made its machine-learned AIFS Single model operational alongside its physics model.
Status
- Claim
Result confirmed
- Our reporting
- High confidence
- Verification
- Unverified claim
- Importance
- Major (4 of 5)
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 AstraIn its training data
- Claude Opus 5.5In its training data
- Gemini 4 HydrogenIn its training data
- Grok 4.7In its training data
It happened before the cutoffs of all four assistants, so it can be in their training data.
Key facts
- AIFS Single: operational 25 Feb 2025, ~28 km grid, ~1,000× less energy, up to 20% better cyclone tracks
- AIFS ENS operational 1 Jul 2025; both upgraded to v2 on 12 May 2026
- NOAA (17 Dec 2025): AIGFS uses 99.7% less compute; AIGEFS uses 9% of the physics ensemble’s compute and gains 18–24 h of skill; HGEFS is billed as the first operational hybrid AI/physics ensemble
- ECMWF Director-General Florence Rabier: ‘This milestone will transform weather science and predictions.’
What happened
Within about 15 months of GraphCast’s publication, the world’s leading forecast centres began issuing official forecasts from machine-learned models.
Why it matters
It is one of the fastest transitions of AI research into critical public infrastructure.
Sources
3 sources from 3 sites. Numbers match the chips in the text.
3 sources: 2 primary, 1 press
Primary
- ECMWF: AI forecasts become operationalecmwf.int, official
- NOAA deploys new generation of AI-driven global weather modelsnoaa.gov, official
Press
- CACM: AI weather forecasting goes operationalcacm.acm.org, press
Changes
- Filed