Arizona Severe Flash Flood Warning | Effective 09/13/2026 16:43

Headline: 
Flash Flood Warning issued September 13 at 4:43PM MST until September 13 at 11:00PM MST by NWS Flagstaff AZ
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
September 13, 2026 - 4:43pm
Expires: 
September 13, 2026 - 11:00pm
Description: 
FFWFGZ The National Weather Service in Flagstaff has extended the * Flash Flood Warning for... The Havasu Creek basin in... Coconino County in north central Arizona...This includes the Colorado River between river miles 156 and 158 * Until 1100 PM MST Sunday. * At 443 PM MST, Doppler radar indicated thunderstorms producing heavy rain over portions of the Havasu Creek basin. Between 0.5 and 1.5 inches of rain have fallen. Additional rainfall amounts of 0.25 to 0.75 inches are possible in the warned area. Runoff from these storms will eventually flow into Havasu Creek and may cause flash flooding through the evening hours. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding in and around the Havasu Creek basin. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of areas in and around the Havasu Creek basin. * Some locations that will experience flash flooding include... Little Navajo Falls, Mooney Falls, Beaver Falls, Hualapai Hilltop, Havasupai Reservation and Supai. This includes the Colorado River between river miles 156 and 158. This includes the following swimming holes... All swimming holes on Havasu Creek near Supai. This includes the following creeks, washes and rivers... Little Coyote Canyon, Sinyella Canyon, Heather Wash, Pasture Wash, Colorado River, Black Tank Wash and Havasu Creek.
Instruction: 
Campers and hikers should hustle to higher ground immediately! Stay away from creeks and washes! Foot bridges will be washed out in Supai Campground. Some campsites will be flooded. Campers may be stranded in portions of the campground.
Area Description: 
Coconino, AZ
Forcast Office: 
NWS Flagstaff AZ
Sender: 
w-nws.webmaster@noaa.gov