NWS Grand Junction COFF.W 0112September 15, 2026
Flash Flood Warning: San Juan, UT
The National Weather Service office in Grand Junction issued a flash flood warning for San Juan in Utah, which was in force until 12:45 p.m. local time on September 15. It was the 112th flash flood warning the NWS office in Grand Junction issued in 2026. Utah had 33 flash flood warnings in September 2026, against 10 in an average September of 2008-2025 (Utah's flash flood warnings by year).
ExpiredWarning
In force for 2.9 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
- San Juan
- State
- Utah
- Level
- Warning
- Issued
- 9:49 a.m. MDT, September 15, 2026
- Expires
- 12:45 p.m. MDT, September 15, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KGJT FF.W 0112
- 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... Central San Juan County in southeastern Utah... * Until 1245 PM MDT. * At 949 AM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Mainly rural areas of Central San Juan County.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become life threatening in heavy rains. Campers and hikers should avoid streams or creeks. 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. 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.