Debris Flow in Arizona
Every debris flow event the National Weather Service has filed in Arizona, year by year, with the most significant episodes. A fast-moving slurry of mud, rock and debris, usually on a slope soaked by heavy rain or stripped by a fire.
The most significant on the map
The most significant debris flow episodes in Arizona.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 32
- Deaths
- 0
- Injuries
- 0
- Damage
- $175,000
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Flash Flooding and Debris Flow in Arizona, July 4, 2021On the 4th, deep moisture was in place with near record level PWAT values of 1.8-2.0 inches observed by regional soundings. Instability was marginal with MLCAPE around 1000 J/kg, but it was sufficient for thunderstorms to develop across Gila county in the afternoon.
- Flash Flooding and Debris Flow in Arizona, July 17 to 21, 2021A big push of monsoon moisture led to ten days of scattered thunderstorms over the Mojave Desert. Many storms produced flash flooding and/or high winds. Events in this episode are continued in the July 22-26 Thunderstorms episode.
- Flash Flooding and Debris Flow in Arizona, September 10 to 13, 2022The remnant circulation of former Pacific Hurricane Kay brought thunderstorms and flash flooding to the Mojave Desert.
- Debris Flow and Damaging Wind in Arizona, July 13, 2022Scattered thunderstorms moved west across southeast Arizona during the afternoon and evening. One storm produced a lightning strike that caused a house fire in Sahuarita.
- Flash Flooding and Debris Flow in Arizona, August 17, 2012Around 2 inches of precipitable water was acted upon by a mid level trough to produce thunderstorms which dropped extremely heavy rain in southeast Arizona. Flash flooding was the result.
- Debris Flows in Arizona, July 27, 2020An axis of deep moisture over eastern Arizona and hot afternoon temperatures led to the development of strong thunderstorms in southern Gila county. Weak environmental winds resulted in slow storm motions and some back building of storms.
- Flash Flooding and Debris Flows in Arizona, July 28, 2022Scattered slow moving thunderstorms developed over southeast Arizona during the morning and afternoon. Heavy rain resulted in flash flooding in Pinal County, the Tucson Metro area and over the Contreras Fire burn scar.
- Flash Flood and Debris Flow in Arizona, August 29, 2013A prominent ridge was in place over the center United States, with very moist air in place over southern Arizona. Precipitable water values were near 2 inches. Weak upper level flow caused storms to move slowly.
- Flash Flood and Debris Flow in Arizona, July 11, 2011Monsoon moisture caused scattered thunderstorms across northern Arizona caused heavy rain, flash flooding, a rock slide, and a funnel cloud.
- Flash Flood and Debris Flow in Arizona, August 24 to 26, 2022Monsoon moisture fueled scattered thunderstorms over northwest Arizona. A few storms produced flash flooding and severe weather.
- Debris Flow and Dust Storm in Arizona, June 29, 2022Thunderstorms moved northwest across southeast Arizona. Thunderstorm winds produced a wall of dust and downed power lines northwest of Tucson while heavy rain caused flash flooding in the Baboquivari Mountains.
- Flash Flood and Debris Flow in Arizona, June 30, 2022Thunderstorms moved west across southeast Arizona. Thunderstorm winds downed power lines in Patagonia while heavy rain caused flash flooding in the Baboquivari Mountains.
- Debris Flows and Damaging Wind in Arizona, July 15, 2020Isolated slow and erratic moving thunderstorms occurred across parts of southeast Arizona from Tucson and Nogales eastward. One storm produced severe wind gusts southeast of Tucson and another storm produced heavy rain that led to debris flows on the Bighorn Fire burn scar area.
- Flash Flood and Debris Flow in Arizona, June 23, 2022Thunderstorms moved north across southeast Arizona. Thunderstorm winds produced a wall of dust along I-10 in Pinal County. Other storms produced heavy rain and flash flooding in the Baboquivari Mountains.
- Debris Flow and Hail in Arizona, September 9, 2011A thunderstorm produced one inch hail in Munds Park and a mud slide in Oak Creek Canyon.
- Debris Flows in Arizona, July 22, 2020Isolated slow and erratic moving thunderstorms occurred across parts of southeast Arizona from Tucson and Nogales eastward. One storm produced heavy rain that led to debris flows on the Bighorn Fire burn scar area.
- Debris Flow and Dust Storm in Arizona, June 26, 2022Thunderstorms moved southwest across southeast Arizona. Thunderstorm winds produced a wall of dust along I-10 in Pinal County. Other storms produced heavy rain and flash flooding in the Baboquivari Mountains.
- Debris Flow in Arizona, November 8, 2004Department of Public Saftey reported a rock slide on I-17 near Bumble Bee (Mile post 225). Heavy rain was observed in the area.
- Debris Flow in Arizona, August 24, 2006Heavy rain caused at least three rock slides on Highway 89A through Oak Creek Canyon below the Brins Fire (June 2006) area. The Highway was closed until the slides could be cleared.
- Debris Flow in Arizona, July 30, 2006Heavy rain caused at three debris slides over Highway 89A in Oak Creek Canyon near Sedona. One slide was 100 feet wide and covered the road 4 feet deep. This area was below the Brins Fire scar area.
- Debris Flow in Arizona, October 9, 2006Heavy rain from a thunderstorm caused a rock slide in the Brins fire area.
- Debris Flow in Arizona, August 1, 2007Heavy rain caused a rock slide southeast of Bagdad.
- Debris Flow in Arizona, August 13, 2007Heavy rain caused a rock slide on Highway 89 south of Prescott.
- Debris Flow in Arizona, August 8, 2008A thunderstorm produced very heavy rain that cause a rock slide in Oak Creek Canyon.
- Debris Flow in Arizona, August 17, 2008A thunderstorm produced heavy rain that caused a mudslide that closed Highway 89A in Oak Creek Canyon.
More
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.