A number of rounds of thunderstorms were triggered by a westward moving upper level weather system across southeast Arizona from the afternoon of July 22 into the early morning of July 23. Thunderstorms produced wind damage and flash flooding in Douglas, Green Valley and the Tucson Metro area. Flooding also occurred along the San Pedro River as well as the Pantano Wash and Rillito River, and eventually downstream along the Santa Cruz River. In Graham County, 1 fatality occurred in a flash flood of the Cottonwood Wash near Pima on July 22.

Thunderstorm Wind in PINAL, ARIZONA
From 22-JUL-21 17:30:00 to 22-JUL-21 17:30:00 (MST-7)
Location: CHUICAU
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds downed a power pole and caused minor damage to a house in Chuichu.

Thunderstorm Wind in PIMA, ARIZONA
From 22-JUL-21 21:55:00 to 22-JUL-21 22:00:00 (MST-7)
Location: GREEN VLY
Magnitude: 61.00 EG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds downed 60 power poles and numerous trees and in Green Valley and Sahuarita, mostly along La Canada Dr. from Duval Mine Rd to near Anamax Rd. and near the entrance to Quail Creek. A traffic signal was also damaged in Green Valley while the wall of a townhouse was blown over in Sahuarita.

Thunderstorm Wind in COCHISE, ARIZONA
From 22-JUL-21 20:22:00 to 22-JUL-21 20:25:00 (MST-7)
Location: DOUGLAS
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds downed several trees and blew a metal roof off a hardware store in Douglas.

Thunderstorm Wind in PIMA, ARIZONA
From 22-JUL-21 23:55:00 to 22-JUL-21 23:55:00 (MST-7)
Location: VAIL
Magnitude: 52.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds downed a tree near Interstate 10 and Houghton.

Flash Flood in GRAHAM, ARIZONA
From 22-JUL-21 21:20:00 to 22-JUL-21 23:55:00 (MST-7)
Location: PIMA
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Heavy rain of 2 to 2.5 fell in less than 2 hours between the Pinaleno Mountains and Highway 70 west of Safford. This caused flash flooding of roads in the Pima area and significant rises in Cottonwood Wash. A large SUV which was attempting to cross the wash and carrying two adults and four children was swept away in the floodwaters. A four-year old girl drown during the rescue attempt. Her body was found four days later downstream in the Gila River near Eden.

Flash Flood in COCHISE, ARIZONA
From 22-JUL-21 21:15:00 to 22-JUL-21 22:45:00 (MST-7)
Location: DOUGLAS ARPT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rain of 1.5 to 2.5 fell in less than 1 hour in the Douglas area causing flash flooding of streets and caused the closure of Washington Ave where several homes were flooded and a block wall was knocked down by flood waters. West of town, Kings Highway just north of State Route 80 was closed due to flooding.

Flood in PIMA, ARIZONA
From 23-JUL-21 03:15:00 to 23-JUL-21 11:00:00 (MST-7)
Location: VAIL
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: County Official

Widespread heavy rain across eastern Pima County resulted in widespread flooding of roadways and high flows along Pantano Wash and Rillito River. Significant damage to the Loop hiking and biking trail system occurred.

Thunderstorm Wind in PIMA, ARIZONA
From 22-JUL-21 16:20:00 to 22-JUL-21 16:20:00 (MST-7)
Location: TUCSON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds downed a tree near the intersection of Speedway and Craycroft, which led to a traffic accident.

Hail in PIMA, ARIZONA
From 22-JUL-21 16:40:00 to 22-JUL-21 16:40:00 (MST-7)
Location: SABINO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in PIMA, ARIZONA
From 22-JUL-21 23:30:00 to 23-JUL-21 02:00:00 (MST-7)
Location: SABINO
Flood cause: Heavy Rain
Property damage: 350.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large area of 1 to 2 of rain fell in less than 90 minutes in southeast Pima County and caused extensive flash flooding from southeast Tucson and Vail southwest to Sahuarita and Green Valley. In the Vail area, three to four feet of water washed out East Andrada Rd at the Santa Rita Wash and a car was swept downstream 300 yards, but the occupants escaped unharmed.  Many roads in Saguaro National Park East were also flooded or closed.  In southeast Tucson, a person was rescued from a sandbar in the Pantano Wash near Harrison Rd. and farther south, Sahuarita and Wilmot Rds. were closed. In Sahuarita a woman was rescued from her vehicle at Beta Street and the Interstate 19 Frontage Rd.  In Green Valley, several roads were closed and homes were flooded in the Casa de Abrego neighborhood east of I-19.

Flash Flood in PINAL, ARIZONA
From 22-JUL-21 23:15:00 to 23-JUL-21 02:15:00 (MST-7)
Location: SAN MANUEL
Flood cause: Heavy Rain
Property damage: 750.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain of 1 to 1.5 fell in less than 1 hour along the entire length of the San Pedro River from San Manuel to Dudleyville and 3 fell near Dudleyville caused the river to rise rapidly, with a greater than 7 foot rise measured in one hour near Mammoth. Extensive flash flooding and severe damage to nearby roadways occurred in the San Manuel, Mammoth and Dudleyville areas.

Flood in PINAL, ARIZONA
From 24-JUL-21 02:00:00 to 24-JUL-21 11:00:00 (MST-7)
Location: RED ROCK
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rains upstream in the basin late July 22 into July 23, raised water levels in the Santa Cruz River and Greene Wash in Pinal County. Several roads were washed out where the Santa Cruz becomes multi-channeled from west of Pinal Airpark to southwest of Picacho.

Flash Flood in PIMA, ARIZONA
From 22-JUL-21 16:50:00 to 22-JUL-21 18:00:00 (MST-7)
Location: (DMA)DAVIS MONTHAN A
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

One to two inches of rain in less than 1 hour over east central Tucson caused flash flooding along and near Alamo Wash.  A child was rescued from flood waters near 22nd and Kolb.  Farther north, Alamo Wash overtopped Speedway Blvd and Sahuara Ave.

Flash Flood in PIMA, ARIZONA
From 23-JUL-21 02:00:00 to 23-JUL-21 04:00:00 (MST-7)
Location: TUSCON MARANA NW AIRPORT
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: County Official

A broad area of 1 to 2 of rain fell in less than 1 hour from the Tucson Mountains west to Picture Rocks. Numerous streets were flooded, closed and/or damaged as a result. At least one vehicle was stranded in flood waters, on Manville Rd.

Flash Flood in PIMA, ARIZONA
From 23-JUL-21 01:00:00 to 23-JUL-21 03:15:00 (MST-7)
Location: (DMA)DAVIS MONTHAN A
Flood cause: Heavy Rain / Burn Area
Property damage: 500.00K
Crop damage: 0.00K
Reported by: County Official

A large area of 1 to 3 of rain fell in less than 1 hour over much of the Tucson Metro Area, including parts of the Bighorn burn scar. Around ten swift water rescues were performed during the overnight hours for motorists trapped in vehicles including near Escalante and Sarnoff. Plus, two people were rescued from the Rillito River near La Canada Dr. Also, many trails were damaged at Sabino Canyon Recreation Area and six homes were flooded in near Finger Rock Wash in the Catalina Foothills due to runoff from the Bighorn burn scar. No injuries were reported.