DeepMind open-sources WeatherNext cyclone models as Nature paper lands

On 6 August 2026 Google DeepMind published cyclone results in Nature and open-sourced code and weights for WeatherNext Cyclones and WeatherNext 2 on GitHub. The DeepMind blog is the matching product post.

From the 6 August 2026 @GoogleDeepMind post: "Predicting cyclones accurately can help save lives - and every hour of lead time counts. Published in @Nature, our AI model WeatherNext achieves state-of-the-art accuracy in forecasting a storm's track and intensity, giving us a critical extra 24 hours to prepare on average."

Key facts

• Paper: Operational Tropical Cyclone Forecasting with AI in Nature (6 August 2026).
• Open artifacts: WeatherNext Cyclones (paper / 2025-season path, including the live-season checkpoint), WeatherNext 2 (later operational update; same cyclone algorithm, different weights), plus a 1 degree Mini path for free Colab. Full models are ~0.25 degree. Weights sit on a Google Cloud bucket.
• DeepMind-reported skill (blog/X): on average, three-day forecasts match prior models' two-day skill for track, intensity, and wind structure (about a day of extra lead time). The blog also frames that jump as roughly a decade of meteorological progress; treat that as lab rhetoric, not an independent multi-agency finding.
• Technical line: Functional Generative Networks for ensembles, 15-day rollouts, operational support scaled to 1,000 members, co-trained on global atmosphere data and historical IBTrACS storms.
• Ops context: blog cites partnership with the U.S. National Hurricane Center, CIRA, and the UK Met Office, plus 2025 Hurricane Melissa support and live Weather Lab forecasts. Repo and blog both say official warnings still come from national weather services.

How to read it

DeepMind-reported numbers sit against their named baselines. The durable public artifacts today are the paper date plus GitHub code and weights. Frontier Flux is not affiliated with Google, DeepMind, NHC, or Nature. Social is the alert; blog, paper, and repo are the primaries.