May 19, 2021
A closed upper low pressure system continued to spin across New Mexico during the afternoon and evening of May 18th, ejecting a shortwave trough northeast across Northeast Texas into Southeast Oklahoma. A very moist and unstable air mass had developed during the afternoon over these areas, with the trough enhancing large scale forcing for a complex of showers and thunderstorms which shifted northeast across Northeast Texas, Southeast Oklahoma, and Southwest Arkansas. Given the extent of instabil
Source: NOAA National Weather Service Storm Events Database (event 949419). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Smith County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.