Early Warning Information on Extreme Weather
15 April 2019: The Early Warning Information on Extreme Weather web resource has moved to https://www.data.jma.go.jp/gmd/cpd/souten/en/. Please be sure to update any bookmarks.
Early Warning Information on Extreme Weather is issued at 14:30 JST every Monday and Thursday when a high probability (30% or more) of a very high or very low seven-day average temperature is predicted in the week starting from five to eight days ahead of the date of announcement. If information was issued on the preceding announcement date, follow-up information is issued on the next announcement date. The terms very high and very low refer to high or low seven-day average temperatures in the top 10% of all samples.