In a classical monsoonal regime, with deep-layered east to southeast flow, high instability (MLCAPE in excess of 1000-1500 J/KG) along with abundant moisture (PWAT 1.8+ inches) resulted in an environment favorable for thunderstorms. An upper-level disturbance moving across Arizona, aided in increasing the areal coverage as well as enhancing the thunderstorm activity.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:40:00 to 12-AUG-22 16:40:00 (MST-7)
Location: TONOPAH
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed powerlines along Harquahala Valley Rd near I-10. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 14:37:00 to 12-AUG-22 14:37:00 (MST-7)
Location: BOYS RANCH
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Multiple large downed trees, including one crashing through a cinderblock wall and another that fell toward a house along East 212th St and East Village Loop North in Queen Creek. Timing estimated from radar. Estimated wind gusts 55-60 mph. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 15:30:00 to 12-AUG-22 17:30:00 (MST-7)
Location: DREAMLAND VILLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media pictures and video showed flooding along SR-87 near Shooting Range Road. Water appeared to be several inches deep, flowing over the highway. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 18:15:00 to 12-AUG-22 21:45:00 (MST-7)
Location: SCOTTSDALE
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Video showed a car submerged from the floodwaters of Indian Bend Wash along East Starlight Way and North Hayden Road. A Flood Control District of Maricopa County Gauge near the incident showed water levels above alarm stage at 1815 MST, peaking at 4 feet (3397 cfs) at 1924 MST, and dropping below alarm stage at around 2145 MST. No injuries were reported.

Flash Flood in GILA, ARIZONA
From 12-AUG-22 16:00:00 to 12-AUG-22 18:00:00 (MST-7)
Location: GLOBE
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Public

Image from social media along Hackney Avenue in Globe showed a destroyed pickup truck lying along a box culvert, likely swept away by flood waters several feet deep along a wash running adjacent to the road. Timing estimated from radar. No injuries were reported.

Flash Flood in YUMA, ARIZONA
From 12-AUG-22 09:40:00 to 12-AUG-22 11:40:00 (MST-7)
Location: EL PUEBLECITO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The intersection of 4th Ave and 22nd St around the Post Office in Yuma was closed due to flooding. Timing estimated from radar. No damages or injuries were reported.

Hail in MARICOPA, ARIZONA
From 12-AUG-22 15:50:00 to 12-AUG-22 15:50:00 (MST-7)
Location: SCOTTSDALE MUNI
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Ping-pong sized hail reported along Loop 101 and East Cactus Road in Scottsdale. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 15:05:00 to 12-AUG-22 15:05:00 (MST-7)
Location: APACHE WELLS
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power lines reported just southeast of Granite Reef Dam. A photo taken along Power Road also showed at least 1 snapped and 3 toppled power poles. Time estimated from radar. Winds were estimated at 55-60 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 15:22:00 to 12-AUG-22 15:22:00 (MST-7)
Location: MESA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power lines near SR-87 and McLellan Road in Mesa. Timing estimated from radar. Winds were estimated at 55-60 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 15:30:00 to 12-AUG-22 15:30:00 (MST-7)
Location: SCOTTSDALE
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was blown down near the area of East Oak Street and North 87th Terrace in Scottsdale. Timing estimated from radar. Winds were estimated at 60-70 mph. No injuries were reported.

Dust Storm in NORTHWEST PINAL COUNTY, ARIZONA
From 12-AUG-22 12:40:00 to 12-AUG-22 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility of less than 1/4 mile reported near Porter Road and Casa Grande Highway in Maricopa in blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:15:00 to 12-AUG-22 16:15:00 (MST-7)
Location: SUNNYSLOPE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power poles reported in the area of West Cactus Road and North 30th Avenue in Phoenix. Timing estimated from radar. Wind gust was estimated at 60-70 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 15:23:00 to 12-AUG-22 15:23:00 (MST-7)
Location: SCOTTSDALE
Magnitude: 60.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Employee

Multiple trees and tree branches were downed along McDowell Rd near North Miller Road, including a snapped palm tree. A restaurant sign was also blown over. Timing estimated from radar. Winds were estimated around 70 mph based on radar velocities in this area. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 15:37:00 to 12-AUG-22 15:37:00 (MST-7)
Location: SCOTTSDALE MUNI
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A 66 mph gust was measured at Scottsdale Municipal Airport.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:00:00 to 12-AUG-22 16:00:00 (MST-7)
Location: NEW RIVER
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Image showed RV trailer and boat flipped at Lake Pleasant. Timing estimated from radar. Wind gust was estimated at 55-60 mph. No injuries were reported.

Thunderstorm Wind in YUMA, ARIZONA
From 12-AUG-22 09:40:00 to 12-AUG-22 09:40:00 (MST-7)
Location: YUMA
Magnitude: 39.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Social media pictures showed some tree damage in the form of broken branches and a damaged shed near the vicinity of 1st street and 20th Avenue in Yuma. Timing estimated from radar. Winds were estimated at around 45 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 14:45:00 to 12-AUG-22 14:45:00 (MST-7)
Location: (CHD)WILLIAMS AFB
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power lines were reported along Hawes Road between Elliot and Warner Roads. Wind speed estimated around 60 mph. Time estimated from radar. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 12:30:00 to 12-AUG-22 16:00:00 (MST-7)
Location: GILA BEND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

SR-238 was closed entirely from Gila Bend to SR 347 due to flooding. Timing estimated from radar. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 18:40:00 to 12-AUG-22 20:40:00 (MST-7)
Location: AGUILA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Multiple road closures due to flooding were reported in Aguila from the Flood Control District of Maricopa County. Timing estimated from radar. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 16:15:00 to 12-AUG-22 17:15:00 (MST-7)
Location: PARADISE VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media video showed running flood waters, several inches in depth, in the intersection of North Tatum Road and East Doubletree Ranch Road. No damages or injuries were reported.

Flash Flood in GILA, ARIZONA
From 12-AUG-22 16:00:00 to 12-AUG-22 18:00:00 (MST-7)
Location: LITTLE ACRES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Picture shows Russell Rd near Utility St impassable due to flash flooding. Timing estimated from radar. No damages or injuries were reported.

Dust Storm in NORTHWEST PINAL COUNTY, ARIZONA
From 12-AUG-22 13:33:00 to 12-AUG-22 13:53:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility of about 1/4 mile reported in the area of W Tortoise Drive and North Cordes Drive in Eloy in blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Flash Flood in LA PAZ, ARIZONA
From 12-AUG-22 10:30:00 to 12-AUG-22 12:30:00 (MST-7)
Location: QUARTZSITE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tyson wash was reported to hit 12 feet deep with debris. No damages or injuries were reported.

Dust Storm in SCOTTSDALE/PARADISE VALLEY, ARIZONA
From 12-AUG-22 22:10:00 to 12-AUG-22 22:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Video showed visibility of less than 1/4 mile in the area of North Beeline Highway and Thomas Road in the Salt River Reservation area. No accidents or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 15:30:00 to 12-AUG-22 18:30:00 (MST-7)
Location: FOUNTAIN HILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Videos showed washes overflowing in Fountain Hills, with water moving across Golden Eagle Park and then downstream over North El Pueblo Boulevard. Timing estimated from radar. No damages or injuries were reported.

Hail in MARICOPA, ARIZONA
From 12-AUG-22 15:40:00 to 12-AUG-22 15:40:00 (MST-7)
Location: SCOTTSDALE MUNI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail reported in Hayden Road and East Via de Ventura in Scottsdale. Timing estimated from radar. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 15:40:00 to 12-AUG-22 15:40:00 (MST-7)
Location: SCOTTSDALE MUNI
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power poles reported in an area between East Cholla Street to East Redfield Road and East Thunderbird Road to East Sweetwater Avenue in Scottsdale. Timing estimated from radar. Winds were estimated at 65-70 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:00:00 to 12-AUG-22 16:00:00 (MST-7)
Location: SCOTTSDALE MUNI
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Metal power poles were blown over, trapping 18 vehicles, along North Scottsdale Road in Scottsdale. Timing estimated from radar. Wind gusts were estimated between 65-70 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:00:00 to 12-AUG-22 16:00:00 (MST-7)
Location: CACTUS
Magnitude: 61.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Social media pictures showed a large saguaro toppled over and destroying a shed along the area of North 12th Street and East Northern Avenue in Phoenix. Timing estimated from radar. Wind gusts were estimated at 60-70 mph. No injuries were reported.

Dust Storm in CENTRAL LA PAZ, ARIZONA
From 12-AUG-22 17:30:00 to 12-AUG-22 17:50:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Visibility of about 1/4 mile reported in Salome in blowing dust due to thunderstorm outflow. No accidents or injuries were reported.

Flash Flood in YUMA, ARIZONA
From 12-AUG-22 09:40:00 to 12-AUG-22 11:40:00 (MST-7)
Location: MARINE AIR STATION
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

East County 14th Street in Yuma was closed due to flooding. Timing estimated from radar. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 15:36:00 to 12-AUG-22 17:36:00 (MST-7)
Location: FT MCDOWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding was reported on SR-87 Northbound near N Fort McDowell Rd (MP 191). No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 16:20:00 to 12-AUG-22 18:20:00 (MST-7)
Location: SCOTTSDALE MUNI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flooding reported along the entrance ramp at Princess Drive onto the Loop 101 in Scottsdale. Timing estimated from radar. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 17:20:00 to 12-AUG-22 19:20:00 (MST-7)
Location: GLADDEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding reported along US-60 near milepost 75. Timing estimated from radar. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 16:10:00 to 12-AUG-22 17:10:00 (MST-7)
Location: PARADISE VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flooding on roadway near the intersection of North Via Linda and East Via de Ventura in Scottsdale. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:15:00 to 12-AUG-22 16:15:00 (MST-7)
Location: PHOENIX TURF ARPT
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

At least 15 downed and/or snapped power poles along North 35th Avenue, near West Bell Road in Phoenix. Timing estimated from radar. Wind gust was estimated at 60-70 mph. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 16:30:00 to 12-AUG-22 18:30:00 (MST-7)
Location: SCOTTSDALE MUNI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Video showed Cactus Park in Scottsdale flooded with multiple feet of standing water. Timing estimated from radar. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 16:00:00 to 12-AUG-22 18:00:00 (MST-7)
Location: MESA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding was reported on the southbound lanes of SR-87 near Milepost 180. Timing estimated from radar. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:40:00 to 12-AUG-22 16:40:00 (MST-7)
Location: TONOPAH
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed powerlines along Harquahala Valley Rd near I-10. Timing estimated from radar. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 19:15:00 to 13-AUG-22 03:00:00 (MST-7)
Location: SCOTTSDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast video showed a lady stuck at a skate park located along the Indian Bend Wash near McDowell Road in Scottsdale. Rescuers unable to get to her for a couple of hours at least due to the flood waters of several feet along the wash. An aerial rescue was performed around 2215 MST. Just 2 miles upstream along the wash near Indian School Road, a Flood County District of Maricopa County gauge reported water levels going above alarm stage after 1830 MST, rising to a record stage of 5.76 feet (3929 cfs) at around 1907 MST. The water level did not go below flood stage until several hours after, at 230 MST on the 13th. No damages or injuries were reported.

Flash Flood in LA PAZ, ARIZONA
From 12-AUG-22 18:30:00 to 13-AUG-22 05:00:00 (MST-7)
Location: SALOME
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Video images from social media showed raging flood waters occurring near Salome Highway just east of US-60. Timing estimated from radar. In addition, the Flood Control District of Maricopa County Gauge located along Centennial Wash in Wenden showed water levels rising above alarm stage at around 1950 MST, peaking at 3.37 feet (1323 cfs) at around 2034 MST and not going below alarm stage until around 2330 MST. The impacted areas from Centennial Wash include Salome Road, which is located about 4.8 miles downstream of the gauge location in Wenden. No damages or injuries were reported.

Dust Storm in NORTHWEST PINAL COUNTY, ARIZONA
From 12-AUG-22 13:49:00 to 12-AUG-22 14:09:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility of less than 500 feet reported near the area of I-10 and East Florence Boulevard in Casa Grande in blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Dust Storm in NORTHWEST PINAL COUNTY, ARIZONA
From 12-AUG-22 13:33:00 to 12-AUG-22 13:53:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility of 500 feet was reported near the area of West Battaglia Drive and South Sunland Gin Road in Arizona City in blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 16:00:00 to 12-AUG-22 18:00:00 (MST-7)
Location: SCOTTSDALE MUNI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding reported along Loop-101 near East Cactus Road in Scottsdale. Timing estimated from radar. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 18:00:00 to 12-AUG-22 20:00:00 (MST-7)
Location: TONOPAH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Flood Control District of Maricopa County Gauge along Jackrabbit Wash just downstream of North Vulture Mine Road indicated water levels rising above the alarm stage of 2.9 feet at 1800 MST. The flow peaked at 5.70 feet (6000 cfs) at around 1910 MST.  Impacted area included Wickenburg Road, located about 5 miles downstream of the gauge. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-22 17:42:00 to 12-AUG-22 21:30:00 (MST-7)
Location: PARADISE VLY
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Video showed Indian Bend Wash running multiple feet deep, resulting in a car nearly submerged by the running flood waters along McCormick Parkway in Scottsdale. The person inside the vehicle had to be rescued by the Fire Department. A Flood Control District of Maricopa County Gauge along the Indian Bend Wash at Shea Boulevard, located about 3 miles upstream of the incident showed peak flow of 2.92 feet (1875 cfs), which was above alarm stage, at 1640 MST. Additional flow of just over 1000 cfs was likely added to the wash from the Berneil Wash, located about 1 mile upstream of the incident. The gauge along the Indian Bend Wash at Shea Boulevard did not go below alarm stage until just after 2015 MST. No injuries were reported.

Thunderstorm Wind in LA PAZ, ARIZONA
From 12-AUG-22 09:50:00 to 12-AUG-22 09:50:00 (MST-7)
Location: QUARTZSITE ARPT
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several reports of thunderstorm damage across Quartzsite. The damages reported included several trailers/RVs flipped, signs blown around, trees blown over, heavy grills thrown 50 feet, storage sheds destroyed, leaning power poles.  Timing estimated from radar. A wind gust of 65 mph was measured from a amateur radio user. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 12-AUG-22 16:30:00 to 12-AUG-22 16:30:00 (MST-7)
Location: GLENDALE
Magnitude: 43.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Tree branch fell onto a car near the area of North 67th Avenue and West Bethany Home Road in Glendale. Wind gust was estimated at around 50 mph. No injuries were reported.