NWS Fort Worth TXFF.W 0085September 20, 2026
Flash Flood Warning: Grayson, TX
The National Weather Service office in Fort Worth issued a flash flood warning for Grayson in Texas, which was in force until 8:45 p.m. local time on September 20. It was the 85th flash flood warning the NWS office in Fort Worth issued in 2026. Texas had 125 flash flood warnings in September 2026, against 55 in an average September of 2008-2025 (Texas's flash flood warnings by year).
ExpiredWarning
In force for 2.5 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Fort Worth TX
- Area
- Grayson
- State
- Texas
- Level
- Warning
- Issued
- 6:18 p.m. CDT, September 20, 2026
- Expires
- 8:45 p.m. CDT, September 20, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KFWD FF.W 0085
- Official source
- National Weather Service: the notice at its source
Flash Flood Warnings in Texas since 2008Every warning type in Texas
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
FFWFWD The National Weather Service in Fort Worth has issued a * Flash Flood Warning for... Central Grayson County in north central Texas... * Until 845 PM CDT. * At 618 PM CDT, emergency management reported multiple flooded roads and vehicles stuck in flood water 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.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.