Key Facts
• September 13: High-pressure system remains stationary near the Ogasawara Islands.
• Low-pressure system forms along a front stretching from the Korean Peninsula to Tohoku.
• Warm, moist air flows into Japan, causing highly unstable atmospheric conditions.
• Rain expected in parts of western to northern Japan, with potential for severe thunderstorms.
• Eastern Japan faces risks of landslides, flooding, and river overflows.
• Western to northern Japan warned of lightning, tornadoes, and hail.
• Southwestern islands may experience scattered showers and thunderstorms due to moist air.
• Weather map forecast for 9:00 AM on September 13 highlights these conditions.
Summary
Japan is set to experience highly unstable atmospheric conditions on September 13 due to a stationary high-pressure system near the Ogasawara Islands and a low-pressure system forming along a front from the Korean Peninsula to Tohoku. Warm, moist air flowing into the region will lead to rain and severe thunderstorms in parts of western to northern Japan. Eastern Japan is at risk of landslides, flooding, and river overflows, while western to northern areas should prepare for lightning, tornadoes, and hail. The southwestern islands may see scattered showers and thunderstorms. Residents are advised to stay alert to weather updates and take precautions against potential hazards.
