May 20, 2021
A deep longwave trough remained anchored over the Central and Southern Rockies on May 20th, with a deep southerly fetch of low level moisture continuing to maintain an ample moisture-rich environment over the Four State Region. Diurnal heating contributed to air mass destabilization during the afternoon, with disturbances aloft contributing to scattered shower and isolated thunderstorm development across the area. Given the very moist air mass already in place, in addition to nearly saturated gr
Source: NOAA National Weather Service Storm Events Database (event 952543). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Sabine County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.