Multi Weather -Compare Models

Multi Weather lines up several forecasts side by side so you can spot the disagreement at a glance. Instead of trusting one forecast, compare the official JMA forecast and multiple numerical models to make on-site Go/No-Go calls fast.

■ Compare multiple models at once
See JMA (official), GFS (NOAA), MET Norway and Apple — whichever are available for your location — in one timeline. Weather icons, precipitation (amount/probability), wind, temperature and humidity, side by side.

■ Spot risk from model disagreement
Hours where the models disagree (high uncertainty) are highlighted. The way professionals reason from model spread — in seconds, for anyone.

■ Evidence export (CSV)
Export the comparison as CSV to share. Hand a clear basis for a stop/postpone decision to clients or contractors.

■ Jump to other services
Open JMA, tenki.jp, Yahoo Weather or Windy for the exact spot you're viewing, in an in-app window.

■ Built for the field
For construction, civil works, ports, surveying, drones, film shoots, fishing and hiking — anything weather-dependent.

Note: This app does not produce its own forecast. It is a comparison tool for confirmed open data and official agency forecasts (e.g. JMA). Final decisions are your responsibility.

The first 30 days are completely free. To keep using all features afterward, an auto-renewing subscription (monthly or yearly) is required — cancel anytime.

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