A slow moving upper level weather system produced periods of heavy rain across southeast Arizona July 24 and 25, especially in Pinal and Pima counties. Flash flooding occurred where soils were already saturated from heavy rains of July 22 and 23 and runoff continued to fill the Santa Cruz River downstream. Floodwaters caused considerable road damage and a levee break in Greene Wash also caused significant damage to a section of a canal in Pinal County. Before the weather system exited the area, another round of heavy rain during the afternoon and evening of July 27 caused additional flash flooding in the Tucson Metro and in Santa Cruz County.

Flash Flood in PIMA, ARIZONA
From 27-JUL-21 17:45:00 to 27-JUL-21 19:45:00 (MST-7)
Location: VAIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Heavy rain of 2.5 in less than 90 minutes occurred near the headwaters of Rincon Creek. Flash flooding occurred downstream in the Rincon Ranch Estates area. Camino Loma Alta became flooded and impassible.

Flash Flood in PIMA, ARIZONA
From 27-JUL-21 15:45:00 to 27-JUL-21 19:30:00 (MST-7)
Location: MT LEMMON
Flood cause: Heavy Rain / Burn Area
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Around 2.5 of rain in less than 1 hour was measured near the headwaters of Sabino Creek in the Bighorn burn scar and caused a two-foot rise in the stream that crosses trails in the Sabino Canyon Recreation Area. Six hikers had to be rescued after becoming trapped by the high flows.

Flash Flood in PIMA, ARIZONA
From 24-JUL-21 22:30:00 to 24-JUL-21 23:30:00 (MST-7)
Location: GREEN VLY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Heavy rain of 1 to 1.5 in less than 1 hour fell in Green Valley and caused flash flooding and the closure of several roads. Five homes were flooded in the Casa de Abrego neighborhood, some of which had just been flooded less than 48 hours earlier.

Flash Flood in PINAL, ARIZONA
From 25-JUL-21 06:45:00 to 25-JUL-21 10:00:00 (MST-7)
Location: RED ROCK
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Early morning rain of 1 to 1.5 on saturated ground caused flash flooding, closure and damage of Camino Adelante Rd between the Picacho Peak Interstate 10 interchange to Park Link Dr.

Flash Flood in PIMA, ARIZONA
From 25-JUL-21 06:45:00 to 25-JUL-21 10:30:00 (MST-7)
Location: MARANA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Early morning rainfall of 1 to 1.5 on saturated ground quickly resulted in flash flooding and closure of several roads in north Marana.

Flash Flood in PIMA, ARIZONA
From 25-JUL-21 10:30:00 to 25-JUL-21 13:00:00 (MST-7)
Location: SAHUARITA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

More than 1 of rain fell on saturated ground causing flash flooding of several roadways from Sahuarita to Corona De Tucson, including Sahuarita Rd. near Wilmot Rd.

Flash Flood in PIMA, ARIZONA
From 25-JUL-21 11:00:00 to 25-JUL-21 13:30:00 (MST-7)
Location: VAIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

One to two inches of rain on saturated ground cause numerous flooded and closed roads in the Vail area from just east of Rita Ranch to Old Spanish Trail and south to near Interstate 10. One vehicle was stuck in floodwaters near Old Spanish Trail and Drexel Rd.

Flood in PINAL, ARIZONA
From 25-JUL-21 14:00:00 to 27-JUL-21 20:00:00 (MST-7)
Location: FRIENDLY CORNERS
Flood cause: Dam / Levee Break
Property damage: 7.50M
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread rain occurred on July 24 and 25 in the Santa Cruz River watershed in Pinal County and upstream in much of eastern Pima County with 48 hour rain totals of 3 to 4 inches common. High flows in the river traveled downstream into Greene Wash. A levee breached in the wash near Toltec Buttes and washed out a road, then flowed into a canal, causing damage along 3/4 mile of the canal.  Further downstream in Greene Wash, Sunland Gin Rd was also flooded and damaged. Indian Route 15 near Chuichu was also flooded and two nearby homes sustained minor flood damage.

Flash Flood in SANTA CRUZ, ARIZONA
From 27-JUL-21 14:30:00 to 27-JUL-21 16:00:00 (MST-7)
Location: NOGALES
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One to two inches of rain fell in less than 1 hour in Nogales and caused flash flooding of several roads and minor damage to a couple of homes near Western Ave.

Flash Flood in PIMA, ARIZONA
From 25-JUL-21 14:30:00 to 25-JUL-21 15:30:00 (MST-7)
Location: (TUS)TUCSON INTL ARP
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: County Official

Up to 1 of rain on saturated ground caused Franco Wash to rise rapidly and flood and damage several roads in the Summit area.