May 17, 2018
A weak frontal boundary located near the I-64 corridor provided the focus for repeated thunderstorm activity through the evening across several counties. A broad area of low pressure over the southeastern U.S. pulled very high moisture into the region allowing the slow-moving storms to be efficient rainfall producers. Rainfall amount were generally 2 to 4 inches, with isolated higher totals indicated by radar in the heavier cores occurring over a several hour period.
Source: NOAA National Weather Service Storm Events Database (event 749130). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Roanoke County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.