NWS Grand Junction COFF.W 0100August 30, 2026
Flash Flood Warning: Grand, UT
The National Weather Service office in Grand Junction issued a flash flood warning for Grand in Utah, which was in force until 6:45 p.m. local time on August 30. It was the 100th flash flood warning the NWS office in Grand Junction issued in 2026. Utah had 54 flash flood warnings in August 2026, against 29 in an average August of 2008-2025 (Utah's flash flood warnings by year).
ExpiredWarning
In force for 1.4 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Grand Junction CO
- Area
- Grand
- State
- Utah
- Level
- Warning
- Issued
- 5:19 p.m. MDT, August 30, 2026
- Expires
- 6:45 p.m. MDT, August 30, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KGJT FF.W 0100
- Official source
- National Weather Service: the notice at its source
Flash Flood Warnings in Utah since 2008Every warning type in Utah
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
FFWGJT The National Weather Service in Grand Junction has issued a * Flash Flood Warning for... Southeastern Grand County in east central Utah... * Until 645 PM MDT. * At 519 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1 inch of rain has fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. 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... Moab and Castle Valley.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Remain alert for flooding even in locations not receiving rain. Arroyos, streams, and rivers can become raging currents in a matter of minutes, even from distant rainfall. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely. UT-128 may be prone to rockslides and mudslides in heavy rain. Stay alert for rocks and debris on roads, and avoid driving on flooded roads. Find an alternate route. Immediately climb to higher ground. Runoff concentrated through narrow canyon walls can quickly become dangerous, life threatening conditions.
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.