Widespread severe thunderstorms are not likely, but we wouldn’t be surprised to see warnings issued for a few locally severe storms. The instability could also release gradually on Sunday, not in the more explosive late afternoon manner crucial for severe thunderstorms. CAPE values in the 2,000-2,500 J/kg range are definitely sufficient for severe thunderstorms. Severe thunderstorms could develop in the D.C. region each of the next three afternoons and evenings. Unfortunately, whether days such as Sunday end up being big severe weather events, or big “busts,” often boils down to nowcasting the day-of.

Source: Washington Post June 03, 2016 17:52 UTC