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Home > Weather and Earthquakes > Early Warning Information on Extreme Weather

Early Warning Information on Extreme Weather

  • temperature
  • snowfall
This chart shows areas of Early Warning Information on Extreme Weather for Temperature or Snowfall. The period of the prediction is given below the name of the area.

See also the information on the daily Two-week Temperature Forecast providing the latest temperature outlooks.
https://www.data.jma.go.jp/gmd/cpd/twoweek/en/

Early Warning Information on Extreme Weather is issued at 14:30 JST every Monday and Thursday when very high or very low five-day average temperatures, or very heavy five-day snowfall amounts, are expected in the next 6 to 14 days with a probability of 30% or more.
The terms “very high” and “very low” refer to high or low temperatures with climatology appearance ratios of 10%.
The term “very heavy” refers to total snowfall with a climatology appearance ratio of 10%.