May 20, 2017
Thunderstorms were scattered across the mountains of southwest Virginia from mid-afternoon into the evening. With a very moist air mass in place some of the storms produced pockets of heavy rainfall and some flash flooding. A slow-moving cell just south of Grayson Highlands State Park produced rainfall of 3 to 4 inches in about two-hours or close to the 100-year annual recurrence interval (0.01 annual exceedance probability). Rainfall was more in the 2 to 3 inch range in several hours over weste
Source: NOAA National Weather Service Storm Events Database (event 700954). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Grayson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.