Severe · Flood WarningThis alert has expired. It is kept for reference.
Flood Warning issued September 20 at 9:26PM CDT until September 21 at
Affecting Fannin, TX; Grayson, TX
In effect until: Sep 21, 2026, 5:00 AM
Fannin, TX; Grayson, TX
Likely impact across 2 counties in TX; effects through 5:00 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)
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Western Fannin County in north central Texas... Grayson County in north central Texas... * WHEN...Until midnight CDT tonight. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 923 PM CDT, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. Flooding is ongoing in the warned area. Between 2 and 5 inches of rain have fallen. - Additional rainfall amounts up to 1 inch are possible in the warned area. - Some locations that will experience flooding include... Sherman, Bonham, Denison, Van Alstyne, Howe, Pottsboro, Leonard, Whitewright, Bells, Tom Bean, Savoy, Ector, Trenton, Knollwood, Ravenna, Dorchester, Valley Lake, Randolph, Randell Lake and Eisenhower State Park.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™