Key Facts
• Aug 26-27: Heavy rain in northern Japan; landslides and river flooding warnings.
• Nationwide unstable atmosphere through Aug 27; risk of lightning, tornadoes, and strong winds.
• Heatwaves in western to northeastern Japan; heatstroke precautions advised.
• Aug 26: High pressure over Japan shifts eastward; ground-level high pressure moves west.
• Aug 27: Cold air at -12°C passes over Hokkaido, causing unstable weather.
• Rainfall forecast: 150 mm in Hokkaido, 100 mm in Tokai and northern Kyushu (Aug 25-26).
• Aug 27: Cold front moves south from northern to western Japan, increasing storm risks.
• Aug 26-27: Northern Japan faces strong winds, high waves, and potential landslides.
• Aug 27: Unstable weather in southwestern islands due to cold air and moist air.
• Aug 25-29: Simulations predict rain and wind patterns across Japan.
Summary
Japan faces unstable atmospheric conditions from Aug 26-27 due to high pressure and cold air. Northern Japan is at risk of heavy rain, landslides, and river flooding, while western to northeastern regions experience heatwaves. Lightning, tornadoes, and strong winds are possible nationwide. Rainfall is forecasted at 150 mm in Hokkaido and 100 mm in Tokai and northern Kyushu. A cold front will move south on Aug 27, intensifying storms. Southwestern islands also face unstable weather due to cold air and moist conditions. Residents are advised to stay alert for extreme weather and take precautions against heatstroke and flooding.
