Heavy Rainfall Persists in Bangladesh and Myanmar

Over the past three days, parts of northern Pakistan, India, Nepal, Bangladesh, northern and southern Myanmar, southern Thailand, northern Laos, northern Vietnam, Malaysia, and Indonesia have experienced heavy rain or torrential rain, with localized areas witnessing downpours. Accumulated precipitation reached 30 to 70 mm, with some localized areas reaching 100 to 250 mm (Figure 1).

Over the next week, influenced by the combined effects of the southwest monsoon and a low vortex (Figure 2), heavy to torrential rain is expected in northern India along with Karnataka and western Andhra Pradesh, Nepal, Bhutan, Bangladesh, Myanmar, northern Thailand, northern Laos, northern Vietnam, and other regions. Isolated areas may experience downpours, accompanied by severe convective weather, including short-duration intense rainfall and thunderstorms with strong winds. The accumulated precipitation in most of these areas is expected to range from 60 to 120 mm, with some areas receiving 150 to 220 mm, and locally exceeding 250 mm (Figure 3).

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

Figure 1 Accumulated Precipitation from August 1-3, 2025 (Unit: mm)

Figure 2 500 hPa Geopotential Height (Contour Lines) and 850 hPa Wind Field (Wind Barbs) at 12:00 UTC, August 6, 2025

Figure 3 Forecasted Accumulated Precipitation from August 5 to 11, 2025 (Unit: mm)

Author: Li Ming                                                              Reviewer: Niu Ruoyun 

English reviewer:Wang Yi                                                                       Issue approver:Dai Kan