The National Weather Service has issued a flash flood watch ahead of the Arctic cold front responsible for the turbulent weather. An unseasonably mild and humid surge of air will get drawn over the D.C. region out ahead of these features. The repeated movement of showers across the same areas has triggered a concern for flooding — hence the flash flood watch posted by the Weather Service. Forecast models predict the following rainfall amounts for the District: NAM: 0.8 inches; high-resolution NAM: 0.7 inches; American (GFS): 1.6 inches; European: 2.9 inches; Canadian: 1.4 inches; high-resolution Canadian: 1.4 inches. The Weather Service Storm Prediction Center, at this time, foresees that the D.C. region has a marginal risk of any severe storms (Level 1 out of 5 on the threat scale).

Source: Washington Post December 23, 2020 19:56 UTC