Where can I see the improved forecast?

It is in the Weathernews app's My Weather content, where weather icons and precipitation forecasts up to three hours ahead are described as more accurate.

How much better is the new model?

For strong rain of 10mm/h or more, Weathernews says the capture rate rose by 8 points one hour ahead and by 10.1 points at both two and three hours ahead. Its overall score, which also counts missed forecasts, improved about 1.3 times at one hour and about 1.6 times at both two and three hours.

What data did AI-Nowcast learn from?

Weathernews says it used six years of its own analysis values built from radar observations, point observations and weather reports.

AI Business & IndustryAI Watch (Impress)18m agoOct 16, 2026, 16:00 JST

Weathernews puts AI-Nowcast into its weather app

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3 Key Points

What happened
Weathernews said on October 15 it implemented its own AI weather-forecasting model, AI-Nowcast, in its Weathernews weather app, expecting better 1- to 3-hour precipitation accuracy than its current forecast model.
Why it matters
In its My Weather content, the app may now pinpoint when, where and how much rain will fall, which the company expects will help users avoid linear precipitation bands and guerrilla thunderstorms and prepare for daily disasters.

WHO IT HITSPeople who plan outdoor work or travel around short-term rain, such as event organizers and delivery drivers, may get sharper 1- to 3-hour rain warnings from the app.

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FAQ

Where can I see the improved forecast?: It is in the Weathernews app's My Weather content, where weather icons and precipitation forecasts up to three hours ahead are described as more accurate.
How much better is the new model?: For strong rain of 10mm/h or more, Weathernews says the capture rate rose by 8 points one hour ahead and by 10.1 points at both two and three hours ahead. Its overall score, which also counts missed forecasts, improved about 1.3 times at one hour and about 1.6 times at both two and three hours.
What data did AI-Nowcast learn from?: Weathernews says it used six years of its own analysis values built from radar observations, point observations and weather reports.

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