Jul 1, 2016
A cold front passed through the area on July 1st. A southerly flow ahead of the boundary caused warm and humid air in place, which led to an unstable atmosphere. The instability combined with lift from the cold front caused thunderstorms to develop. Some thunderstorms were severe due to stronger sheer profiles from an upper-level trough overhead along with the unstable atmosphere. Thunderstorms produced heavy rainfall.
Source: NOAA National Weather Service Storm Events Database (event 650228). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Calvert County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.