Heavy Rainfall Expected in the Korean Peninsula and Other Regions

Over the next 3 days (August 12-14), under the combined influence of a low trough and the warm, moist air currents on the periphery of the subtropical high (Figure 1), heavy to torrential rain is expected in parts of central and southern North Korea, central and northern South Korea, central Japan, and southern Russian Far East. Locally downpours may occur in southern North Korea and northern South Korea, accompanied by severe convective weather including short-duration intense rainfall and thunderstorms with strong winds. The accumulated precipitation in these areas is expected to range from 30 to 70 mm, with localized areas in southern North Korea and northern South Korea reaching 100 to 180 mm (Figure 2).

Additionally, moderate to heavy rain with localized torrential rainfall is anticipated in northern North Korea and surrounding areas from August 15 to 16.

Attention should be given to the potential secondary disasters triggered by the heavy rainfall in the aforementioned areas, including flooding, landslides, mudslides, and urban waterlogging.

Figure 1 500 hPa Geopotential Height (Contours) and 850 hPa Wind Field (Wind Barbs) at 12:00 UTC, August 13, 2025

Figure 2 Forecasted Accumulated Precipitation from August 12 to 14, 2025 (Unit: mm)

Author: Li Ming                                 Reviewer: Niu Ruoyun 

English reviewer:Wang Yi                                                                       Issue approver:Dai Kan