Severe · Flash Flood WarningThis alert has expired. It is kept for reference.
Flash Flood Warning issued September 20 at 7:35PM CDT until September 20
Affecting Grayson, TX
In effect until: Sep 21, 2026, 2:30 AM
Grayson, TX
Likely impact in Grayson, TX; effects through 2:30 AM.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.
Read the original bulletin (official text)
FFWFWD The National Weather Service in Fort Worth has extended the * Flash Flood Warning for... Central Grayson County in north central Texas... * Until 930 PM CDT. * At 735 PM CDT, emergency management reported multiple flooded roads in and around the Denison area. Flash flooding is already occurring in this area. Additional instances of flash flooding is imminent or occurring in the Sherman to Southmayd areas as well. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Emergency management reported. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Sherman, Denison, Pottsboro, Knollwood, Randell Lake, Eisenhower State Park, Southmayd, Boddie and Carpenters Bluff.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™