Heavy Rainfall in Southern Vietnam and Western Myanmar

Over the next three days, the Indochina Peninsula will experience frequent showers. Moderate to heavy rain, along with rainstorms in isolated areas, is expected across central and southern Myanmar, most of Thailand, northern and southern Laos, Cambodia, and southern Vietnam. These regions will also be accompanied by severe convective weather, such as short-term intense rainfall and thunderstorm gales. In particular, under the continued influence of the peripheral circulation of a monsoon depression (Figure 1), accumulated rainfall in localized areas of western Myanmar and southern Vietnam will exceed 200 mm (Figure 2). Precautions should be taken against potential secondary disasters triggered by heavy precipitation, such as flash floods and mudslides, as well as the adverse impacts of localized severe convective weather on transportation and outdoor operations.

Figure 1: Forecast of 500 hPa Geopotential Height (contours, units: dagpm) and 850 hPa Wind Field (barbs, units: m/s) at 20:00 BJT on May 29, 2026

Figure 2: Forecast of accumulated precipitation from 20:00 on May 29 to 20:00 on June 1, 2026 (Beijing Time) (shaded, unit: mm)

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Author: Lian Zhihua                                 Reviewer: Zhou Ningfang 

English reviewer:Wang Yi                                                                       Issue approver:Dai Kan