Weather Data Maps
This page provides weather-related data and maps around Fukushima Daiichi Nuclear Power Plant. In particular, we focus on the data of wind and rain, which influence the dispersion and deposition of radioacitive materials.
We used to have a "marker version" for the wind in addition to the "tiling version," but it is now integrated into a more advanced World-wide Real-time Wind Maps.
Detailed Information about Weather Data Maps
This visualization is based on numerical weather prediction model GPV (meso scale model, MSM) from Japan Meteorological Agency. Because this is the output of a weather simulation model, please be aware that wind direction and speed may be different from the observation. Observed wind direction and speed is available at real-time AMeDAS wind map.
- Data is updated every three hours, but with a little delay to display the latest information.
- Interval is one hour for the surface level, and three hours for other levels.
- Predictions are available for 15 hours at 3, 9, 15, 21 JST, and for 33 hours at 0, 6, 12, 18 JST. Predictions are overwritten when newer data is available.
- The latest data is shown at the beginning. To see predictions, move the slider to the right; to see past data, move the slider to the left. Clicking the time updates the latest information.
- The red marker shows the location of Fukushima Daiichi nuclear power plant. The circles shows distance from the plant, where the red circle represents 20km (evacuation zone), while the yellow circle represents 30km (indoor evacuation zone).
From March 11, 2011 to March 25, 2011
After March 26, 2011
The archives of past numerical weather prediction GPV data are available on the following site. It is, however, not designed for the nuclear accident at Fukushima Daiichi, so it is not suited for the monitoring. To see the current information, World-wide Real-time Wind Maps is recommended.