{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-09-03-weathernext-3/","md":"https://postcutoff.com/e/2026-09-03-weathernext-3/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-09-03-weathernext-3","date":"2026-09-03","date_precision":"day","short_title":"Google DeepMind's WeatherNext 3 learns from live satellite data","deck":"Hourly 5 km global forecasts and up to 60% better precipitation skill","takeaway":"On Sept 3, 2026 Google DeepMind and Google Research released WeatherNext 3.","category":"science","category_label":"Science & math","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Result confirmed"]},"sources":[{"n":1,"title":"Google: Introducing WeatherNext 3","url":"https://blog.google/innovation-and-ai/models-and-research/google-deepmind/introducing-weathernext-3/","type":"official","group":"primary","domain":"blog.google"},{"n":2,"title":"arXiv 2609.03582: WeatherNext 3","url":"https://arxiv.org/abs/2609.03582","type":"paper","group":"primary","domain":"arxiv.org"},{"n":3,"title":"Brightband Operational WeatherBench live leaderboard","url":"https://owb.brightband.com/","type":"docs","group":"primary","domain":"owb.brightband.com"},{"n":4,"title":"Google DeepMind: Introducing WeatherNext 3","url":"https://deepmind.google/blog/introducing-weathernext-3-our-most-advanced-and-accurate-global-weather-ai-model/","type":"official","group":"primary","domain":"deepmind.google"},{"n":5,"title":"TechCrunch: Google's latest AI weather model","url":"https://techcrunch.com/2026/09/03/googles-latest-ai-weather-model-gives-you-no-excuse-to-forget-your-umbrella/","type":"press","group":"press","domain":"techcrunch.com"}],"official":4,"filed":"2026-09-29","updated":"2026-10-07","orgs":["Google DeepMind","Google Research"],"title":"Google DeepMind's WeatherNext 3 learns from live satellite data: hourly 5 km global forecasts and up to 60% better precipitation skill","summary":"On Sept 3, 2026 Google DeepMind and Google Research released WeatherNext 3. It ingests live geostationary satellite mosaics and trains directly on station observations, producing a new global forecast every hour at up to 5 km resolution (about 5x sharper than WeatherNext 2). Precipitation CRPS improves by up to 60% against IMERG. Google calls it the most accurate global weather model on Brightband's independent live leaderboard, and it powers Search, Gemini, Maps and Earth Engine.","key_facts":["Announced Sept 3, 2026; paper arXiv 2609.03582","Inputs: live 1-hour geostationary satellite mosaics plus historical analysis, into a single Functional Generative Network (FGN) mesh transformer","Hourly forecasts; 5 km for key surface variables, 10 km for other surface variables, 25 km for atmospheric variables (WeatherNext 2: 25 km, 6-hourly)","Precipitation CRPS improvement up to 60% vs IMERG, 30% vs MRMS, 10% vs rain gauges at early lead times; up to 50% more accurate precipitation forecasts a day or more ahead for users","New clean-energy variables: 100 m wind speed, cloud cover, surface solar radiation","Ranked top on Brightband's live Operational WeatherBench, per Google; deployed in Search, Gemini, Maps, Maps Platform Weather API, Earth Engine, BigQuery"],"key_numbers":[],"tags":["weather","forecasting","earth-science","satellite","deepmind"],"science":{"field":"climate-weather","subfield":"numerical weather prediction","problem":"Global high-resolution, rapidly updated weather forecasting from real observations","result":"Hourly global forecasts at up to 5 km trained on live satellite and station data, with large precipitation-skill gains","open_since":"","ai_system":["WeatherNext 3"],"human_role":"Human-led research; AI model","verification":{"key":"expert","label":"Expert-checked","text":"Independent live leaderboard (Brightband) + preprint"},"status":"confirmed","shock":"","kind":"other"},"body_md":"## What happened\n\nDeepMind's weather model stopped depending only on physics-model reanalysis and learns directly from real-time observations, which removes the six-hour data lag of numerical weather prediction.\n\n## Why it matters\n\nIt is a step from AI emulating weather simulators to AI forecasting from raw observations, with global 5 km detail that regions without supercomputing budgets have lacked.","disputed":[],"related":[{"id":"2026-08-06-weathernext-open-source","url":"https://postcutoff.com/e/2026-08-06-weathernext-open-source/","date":"2026-08-06","date_precision":"day","short_title":"DeepMind open-sources WeatherNext 2 and WeatherNext Cyclones with a Nature paper showing ~1 extra day of hurricane warning","deck":null,"takeaway":null,"category":"science","category_label":"Science & math","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Result confirmed"]},"sources":11,"official":4,"filed":"2026-09-29","updated":"2026-10-26","orgs":["Google DeepMind","Google Research"]}],"people":[],"posts":[],"videos":[{"id":"deepmind-weathernext-3","title":"WeatherNext 3: More accurate, timely, and local weather forecasts","url":"https://postcutoff.com/v/deepmind-weathernext-3/"}],"models":[],"changes":[{"date":"2026-10-07","type":"edit","text":"Science block: kind: other (not a long-open problem; listed with other AI science results, not in the open-problems count)"},{"date":"2026-09-30","type":"edit","text":"Added DeepMind blog link"},{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-10-07","human_review":null,"version":{"date":"2026-10-07"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":126,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":65,"in_training_data":false},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":156,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":95,"in_training_data":false}],"short_url":"https://postcutoff.com/s/google-deepmind-weathernext-3"}