NWS Flagstaff AZFF.W 0158September 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 5:15 p.m. local time on September 13. It was the 158th 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
- 2:14 p.m. PDT, September 13, 2026
- Expires
- 5:15 p.m. PDT, September 13, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KFGZ FF.W 0158
- 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... Coconino County in north central Arizona...This includes the Colorado River between river miles 113 and 154. * Until 515 PM MST. * At 214 PM MST, Doppler radar indicated thunderstorms producing heavy rain across a large area of northwest Coconino County, including several drainages in the Grand Canyon that flow into the Colorado River. Between 0.75 and 1.5 inches of rain have fallen. Additional rainfall amounts of 0.25 to 0.75 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, and normally dry washes. * Some locations that will experience flash flooding include... Locust Point, Grand Canyon National Park, Alarcon Terrace, Tobar Terrace, Blacktail Canyon, Garnet Canyon, Muav Canyon, Timp Point, North Timp Point, Stina Point and Havasupai Reservation. This includes the Colorado River between river miles 113 and 154. This includes the following recreation areas and campgrounds... Above Buckhorn Canyon Camp Site, 119.8 Mile Right Camp Site, 119.8 Mile Left Camp Site, Patch Camp Site, Upset Hotel Camp Site and Sinyala Camp Site. This includes the following creeks, washes and rivers... Hundred and Twentyseven Mile Creek, Hakatai Canyon, 119- Mile Creek, 122- Mile Creek, Hundred and Twentyeight Mile Creek, 133- Mile Creek, Galloway Canyon, Royal Arch Creek, Havasu Creek, Deer Creek, Fossil Canyon, 128- Mile Creek, Fishtail Canyon, Blacktail Canyon, Shinumo Creek, 140- Mile Canyon, Olo Canyon, Specter Chasm, Stone Creek, Forster Canyon, Sinyella Canyon, Hundred and Twenty Mile Creek, 150- Mile Canyon, Colorado River, "130- Mile Creek", Matkatamiba Canyon, Tapeats Creek, Bonita Creek, 127-Mile Creek, Garnet Canyon, "127.6- Mile Canyon", Waltenberg Canyon and Bedrock Canyon.
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.