Strong Winds and Heavy Rain Impact Southeastern United States

Eastern Canada is experiencing severe snowstorm conditions

Affected by a low-pressure trough and cold vortex, heavy to very heavy rain is expected in the southeastern United States and northeastern Mexico over the next three days. Some areas will experience torrential rain, with localized extreme downpours. These conditions will be accompanied by severe convective weather, including short-duration intense rainfall and thunderstorms with strong winds. The cumulative precipitation in these regions is forecasted to be 30-60 mm, with some areas receiving 80-100 mm and locally exceeding 120 mm (Figures 1-2). Additionally, moderate to heavy snow or sleet is anticipated in parts of eastern and northwestern Canada, the Labrador Peninsula, central and northern United States, and Alaska, with localized blizzard or severe blizzard conditions. Most of these regions will experience a temperature drop of 4-8°C, with some local areas seeing a drop of over 10°C. Winds of 4-6 on the Beaufort scale are expected, with gusts reaching 7-9, and gusts exceeding 10 in the coastal areas of the southeastern United States and eastern Canada (Figures 3-4). Attention should be given to the potential secondary disasters caused by heavy rainfall, such as flash floods and urban flooding, as well as the adverse impacts of localized severe convective weather on transportation, outdoor activities, and agricultural production.

Figure 1: Forecast of 500 hPa Geopotential Height (contours, units: dagpm) and 850 hPa Wind Field (wind barbs, units: m/s) at 20:00 BST on May 6, 2026

Figure 2: Forecasted Accumulated Precipitation from 20:00 on May 6 to 20:00 on May 9, 2026 (Beijing Time) (Shaded, Unit: mm)

Figure 3: 24-hour Temperature Change Forecast at 2 meters (Shaded, Unit: °C) from 20:00 on May 6, 2026, to 20:00 on May 7, 2026 (Beijing Time)

Figure 4: Forecast of Maximum Gusts for 24 Hours from 20:00 on May 6, 2026, to 20:00 on May 7, 2026 (Beijing Time) (Unit: m/s)

https://www.wmc-bj.net

Author: Zhu Qingliang                                 Reviewer: Liu Xiaobo 

English reviewer:Wang Yi                                                                       Issue approver:Dai Kan