Key Facts
• A low-pressure system in the Sea of Okhotsk is causing unstable weather.
• Warm, moist air is flowing into the Tohoku region, intensifying rainfall.
• Heavy rain with thunderstorms is forecast through August 21.
• Predicted 24-hour rainfall (Aug 20, 6 AM – Aug 21, 6 AM):
– Hokkaido: Up to 100 mm
– Tohoku: Up to 150 mm
• High risk of landslides, flooding, and river overflows in Tohoku.
• Residents are advised to stay indoors during thunderstorms and monitor weather updates.
• Hailstorms may occur, potentially affecting crops and agricultural facilities.
Summary
Northern Japan, particularly the Tohoku region, is bracing for heavy rain and thunderstorms through August 21 due to a low-pressure system in the Sea of Okhotsk. The Japan Meteorological Agency warns of up to 150 mm of rainfall in Tohoku and 100 mm in Hokkaido within 24 hours. The unstable atmospheric conditions increase the risk of landslides, flooding, and river overflows. Residents are urged to take precautions, including moving indoors during thunderstorms and securing agricultural facilities against potential hailstorms. Stay updated on weather alerts to ensure safety.
