Due to the effects of moist air and cold air in the sky, the atmosphere continues to be unstable over a wide area from northern Japan to western Japan, rain clouds have developed in the Tokai and Kanto regions, and heavy rain is falling in Saitama Prefecture.
Western Japan needs to be vigilant late tonight, and eastern Japan and Tohoku until the morning of the 13th, to be wary of sediment-related disasters and inundation of low land.
According to the Meteorological Agency, the atmospheric instability continues from northern Japan to western Japan due to the warm and moist air flowing toward the low pressure system in the Sea of Japan and the cold air in the sky. Rain clouds are developing in Japan.
In the hour until 5:40 pm, it rained 82 mm in Hatoyama Town, Saitama Prefecture.
During the hour until 5 pm, the Ministry of Land, Infrastructure, Transport and Tourism observed extremely heavy rain of 73 mm in the rain gauge installed in Katashina Village, Gunma Prefecture, and 52 mm in Obu City, Aichi Prefecture.
Due to the rain that has fallen so far, there are areas in Gunma Prefecture where sediment-related disaster warning information has been announced.
Heavy rains with lightning may occur in western Japan late at night on the 12th and in eastern Japan and northeast on the morning of the 13th, with a very heavy rainfall of 50 mm per hour locally.
The amount of rain in the 24 hours until the evening of the 13th is expected to be 100 mm in Tokai and Kanto Koshin, and 80 mm in Niigata and Tohoku.
The Japan Meteorological Agency is wary of sediment-related disasters, inundation of low land, and sudden flooding of rivers, and is calling for attention to lightning strikes, gusts, and hail.