Flood Watch issued August 30 at 4:23AM MST until September 1 at 12:00AM MST by NWS Flagstaff AZ

Kaibab Plateau; Marble and Glen Canyons; Grand Canyon Country; Coconino Plateau; Northeast Plateaus and Mesas Hwy 264 Northward; Chinle Valley; Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Coconino County; Little Colorado River Valley in Navajo County; Little Colorado River Valley in Apache County; Western Mogollon Rim; Eastern Mogollon Rim; White Mountains; Black Mesa Area; Northeast Plateaus and Mesas South of Hwy 264

Urgency: Future

Certainty: Possible

Onset: 8/30/2026, 9:00:00 PM

Expires: 8/31/2026, 12:00:00 AM

Details

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Apache, Coconino, and Navajo counties. * WHEN...From 2 PM MST /3 PM MDT/ this afternoon through Monday evening. * IMPACTS...Flash flooding will be possible in creeks, normally dry washes, swimming holes, and over recently burned areas. Raging killer currents will be possible in side canyons and narrow slot canyons. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Numerous to widespread showers and thunderstorms are expected across much of central and northern Arizona on Sunday and Monday, including the overnight hours Sunday night. These storms will have the potential to produce heavy rainfall, which could lead to flash flooding. - Additional information is available at weather.gov/flagstaff.

What To Do

Have a way to receive Flash Flood Warnings and be prepared to take action should warnings be issued. Consider changing your plans if you were going to hike, boat, or paddleboard to a slot canyon or normally dry wash. If you do still decide to recreate, check in at a nearby visitor center or ranger station.

Affected States

Colorado

Other Active Flood Watch Alerts

Flood Watch issued August 30 at 6:15AM MST until August 31 at 5:00AM MST by NWS Tucson AZ

Tohono O'odham Nation including Sells; Upper Santa Cruz River and Altar Valleys including Nogales; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle; Upper San Pedro River Valley including Sierra Vista/Benson; Dragoon/Mule/Huachuca and Santa Rita Mountains including Bisbee/Canelo Hills/Madera Canyon; Santa Catalina and Rincon Mountains including Mount Lemmon/Summerhaven; Baboquivari Mountains including Kitt Peak

Flood Watch issued August 30 at 4:23AM MST until September 1 at 12:00AM MST by NWS Flagstaff AZ

Yavapai County Mountains; Northern Gila County; Yavapai County Valleys and Basins; Oak Creek and Sycamore Canyons

Flood Watch issued August 30 at 4:18AM MDT until August 31 at 12:00AM MDT by NWS Grand Junction CO

Central Yampa River Basin; Roan and Tavaputs Plateaus; Grand Valley; Debeque to Silt Corridor; Central Colorado River Basin; Grand and Battlement Mesas; Gore and Elk Mountains/Central Mountain Valleys; Central Gunnison and Uncompahgre River Basin; West Elk and Sawatch Mountains; Flat Tops; Upper Gunnison River Valley; Uncompahgre Plateau/Dallas Divide; Northwestern San Juan Mountains; Southwest San Juan Mountains; Paradox Valley/Lower Dolores River; Four Corners/Upper Dolores River; Southeast Utah; Tavaputs Plateau; Arches/Grand Flat; La Sal and Abajo Mountains; Canyonlands/Natural Bridges

Flood Watch issued August 30 at 1:06AM MST until August 31 at 5:00AM MST by NWS Phoenix AZ

Aguila Valley; Northwest Valley; Tonopah Desert; Buckeye/Avondale; Cave Creek/New River; Deer Valley; Central Phoenix; North Phoenix/Glendale; New River Mesa; Scottsdale/Paradise Valley; Rio Verde/Salt River; East Valley; Fountain Hills/East Mesa; South Mountain/Ahwatukee; Southeast Valley/Queen Creek; Tonto Basin; Mazatzal Mountains

Flood Watch issued August 30 at 1:06AM MST until August 31 at 5:00AM MST by NWS Phoenix AZ

Superior; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Pinal/Superstition Mountains; Sonoran Desert Natl Monument; San Carlos; Dripping Springs; Globe/Miami; Southeast Gila County

Source: National Weather Service.