NWS Flagstaff AZFF.W 0154September 13, 2026
Flash Flood Warning: Coconino, AZ
The National Weather Service office in Flagstaff issued a flash flood warning for Coconino in Arizona, which was in force until 1:30 p.m. local time on September 13. It was the 154th flash flood warning the NWS office in Flagstaff issued in 2026. Arizona had 145 flash flood warnings in September 2026, against 41 in an average September of 2008-2025 (Arizona's flash flood warnings by year).
ExpiredWarning
In force for 3 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Flagstaff AZ
- Area
- Coconino
- State
- Arizona
- Level
- Warning
- Issued
- 10:29 a.m. PDT, September 13, 2026
- Expires
- 1:30 p.m. PDT, September 13, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KFGZ FF.W 0154
- Official source
- National Weather Service: the notice at its source
Flash Flood Warnings in Arizona since 2008Every warning type in Arizona
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
FFWFGZ The National Weather Service in Flagstaff has issued a * Flash Flood Warning for... Havasupai Creek This includes the Colorado River between river miles 156 and 158 Coconino County in north central Arizona... * Until 130 PM MST. * At 1029 AM MST, Doppler radar indicated thunderstorms producing heavy rain across the warned area, just north of Supai along Havasu Creek. Between 0.5 and 0.75 inches of rain have fallen. Additional rainfall amounts of 0.25 to 0.5 inches are possible in 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, normally dry washes, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Beaver Falls, Mooney Falls, Little Navajo Falls. This includes the Colorado River between river miles 156 and 158. This includes the following recreation areas and campgrounds... Second Chance Camp Site. This includes the following swimming holes... All swimming holes on Havasu Creek near Supai. This includes the following creeks, washes and rivers... Sinyella Canyon, Colorado River, Little Coyote Canyon and Havasu Creek.
What the agency told people to do
Flooding of washes and creeks will occur, some dirt roads will become muddy and impassable. Paved roads and underpasses could become flooded as well. Get out of washes and creeks if you are camping or hiking! Flooding is occurring or imminent and will inundate creeks and washes.
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.