The Japan Meteorological Agency has urged caution in the Kanto region, including Tokyo, from Monday evening, February 2, through early Tuesday morning, February 3, 2026, for possible lightning strikes, tornadoes, heavy rain, and hail. Cold air below minus 33°C is expected to flow into the Kanto-Koshin region at 5,500 meters altitude, making atmospheric conditions highly unstable. Residents are advised to seek indoor shelter if signs of developing cumulonimbus clouds appear.
On February 2, 2026, the Japan Meteorological Agency issued a warning for severe weather risks in the Kanto region and surrounding areas. The advisory covers the evening of Monday, February 2, through the early morning of Tuesday, February 3, highlighting dangers including lightning strikes, potential tornadoes, heavy rain, and hail.
The instability stems from cold air below -33°C entering the Kanto-Koshin region at an altitude of 5,500 meters, which is expected to create highly unstable atmospheric conditions. This could lead to the rapid formation of cumulonimbus clouds and intense weather events.
Officials advise people to watch for approaching thunderclouds and immediately seek shelter indoors to protect their safety. Such alerts aim to encourage proactive measures among residents to prevent harm from sudden meteorological shifts.
