UPDATE — Wednesday, October 21, 11:49 PM CT: The National Weather Service in Flagstaff has adjusted the Flash Flood Warning for the Moenkopi Wash in Coconino County — it now runs until 2:00 AM MST. The Moenkopi Wash near Tuba City remains above major flood stage, with flash flooding already occurring. Stay away or be swept away — never cross flooded roads.

UPDATE — Wednesday, October 21, 10:27 PM CT: The National Weather Service in Flagstaff has extended this Flash Flood Warning for Coconino County to 2:30 AM MST. A river gauge on the Little Colorado River near the Colorado River reported a rapid 5-foot rise from today's storms, and another half inch to an inch of rain is possible. Flash flooding is ongoing or expected shortly around Little Colorado River Navajo Tribal Park and Salt Trail Canyon — State Route 64 near mile markers 282, 285, and 286 is in the affected zone. If you see water rising around you, get to higher ground immediately.

UPDATE — Wednesday, October 21, 6:35 PM CT: the National Weather Service in Flagstaff has extended this Flash Flood Warning for Coconino County to 8:30 PM Mountain time. Between a half inch and an inch of rain has fallen, with up to another inch possible. Flash flooding of washes and creeks is ongoing — some dirt roads are muddy and impassable, and paved roads and underpasses could flood.

Flagstaff, AZ — The National Weather Service in Flagstaff has issued a Flash Flood Warning for Coconino County in north central Arizona, running through 5:30 PM MST (7:30 PM CDT) Wednesday.

What is happening: Thunderstorms are dropping heavy rain across the warned area. Doppler radar indicated between half an inch and an inch of rain had already fallen by early afternoon, with another half inch to an inch and a half possible. Flash flooding is ongoing or expected to begin shortly.

Local impacts: Washes and creeks will flood. Dirt roads will turn muddy and impassable, and paved roads and underpasses could go under water as well.

What to do: Never drive through flooded roads — turn around, don't drown. If you see water rising around you, get to higher ground immediately. Stay away from normally dry washes, creeks, and underpasses — they can fill with little warning. Keep an eye on the sky and move to higher ground before water arrives.

Source: National Weather Service in Flagstaff, October 21, 2026.