With upper level high pressure centered near Las Vegas, Nevada this promoted increased northeasterly flow through central and southern Arizona. 30-35 kts of 0-6 km bulk shear was analyzed over south-central Arizona under this regime and with 1000-1500 J/kg of MLCAPE, organized strong to severe thunderstorms developed over the Mogollon Rim in the afternoon and spread through the lower deserts of south-central Arizona through the evening hours. Two severe multi-cellular clusters progressed off the high terrain into the lower deserts of Pinal and Maricopa counties and eventually merged together in northwest Pinal county before continuing southwest. The severe storms produced widespread 40+ mph wind gusts with many areas of 60-70 mph gusts. There were numerous toppled trees, downed power lines, damaged roofs, and other infrastructure and property damage as a result of the severe winds. Over 35,000 customers across Phoenix also lost power. The severe winds also produced a dust storm out ahead of the storms with widespread dense blowing  dust pushing west through northern Pinal and southwest Maricopa counties. There was also an area of dense blowing dust reported in the North Phoenix foothills with the northern multi-cell cluster. This was the second day in a row with severe winds moving through some of the same areas.

Thunderstorm Wind in PINAL, ARIZONA
From 10-JUL-21 20:10:00 to 10-JUL-21 20:10:00 (MST-7)
Location: SANTAN
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Department of Highways

Multiple wooden power lines down due to strong thunderstorm winds on SR-587 near Nelson Road, leading to the closure of SR-587 between I-10 and Indian Route 68. Wind speeds estimated around 60 mph and timing estimated from radar. No injuries reported.

Thunderstorm Wind in PINAL, ARIZONA
From 10-JUL-21 20:40:00 to 10-JUL-21 20:40:00 (MST-7)
Location: LIRIM
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The top half of a 20 foot vertical antenna mast was toppled over in strong thunderstorm winds. Multiple downed trees were also reported across the town of Maricopa. Winds were estimated around 55-65 mph. Timing estimated from radar.

Thunderstorm Wind in PINAL, ARIZONA
From 10-JUL-21 19:45:00 to 10-JUL-21 19:45:00 (MST-7)
Location: MAGMA
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station SRP22 at 10.9 miles NW of Florence measured a 59 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:00:00 to 10-JUL-21 20:00:00 (MST-7)
Location: APACHE WELLS
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station SRP10 at 6.5 miles N of East Mesa measured a 67 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 21:14:00 to 10-JUL-21 21:14:00 (MST-7)
Location: MOBILE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station MAMO at 2.2 miles SE of Mobile measured a 64 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 18:50:00 to 10-JUL-21 18:50:00 (MST-7)
Location: CAREFREE
Magnitude: 72.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A SRP mesonet station at Horseshoe Dam measured an 83 mph wind gust.

Thunderstorm Wind in GILA, ARIZONA
From 10-JUL-21 18:55:00 to 10-JUL-21 18:55:00 (MST-7)
Location: ROOSEVELT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station AU919 at 2 miles SSE of Roosevelt measured a 63 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:00:00 to 10-JUL-21 20:00:00 (MST-7)
Location: (CHD)WILLIAMS AFB
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS at Phoenix-Mesa Gateway airport (KIWA) measured a 60 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:00:00 to 10-JUL-21 20:15:00 (MST-7)
Location: SUNNYSLOPE
Magnitude: 56.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Multiple photos and videos on social media and reports from broadcast media of at least 14 downed utility power poles along 35th Avenue between Dunlap Avenue and Cactus Road in Phoenix due to strong winds from a severe warned thunderstorm. The downed poles and lines also knocked over street signs and street lamps, disrupted traffic, and caused a power outage for the area that took more than a day to be restored. Additionally, several large trees were uprooted or snapped in and around Cortez Park at 35th Ave and Dunlap Ave and a metal carport reportedly blew more than a block away near 35th Ave and Peoria Ave. Wind gusts were estimated around 55-65 mph. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 19:57:00 to 10-JUL-21 19:57:00 (MST-7)
Location: DESERT SANDS
Magnitude: 52.00 EG
Property damage: 0.80K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple large trees snapped or blown over in strong winds during a severe warned thunderstorm around the Superstition Springs Center near Power Road and Southern Avenue. Winds estimated around 55-60 mph. Timing estimated from radar. No injuries reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:06:00 to 10-JUL-21 20:06:00 (MST-7)
Location: DREAMLAND VILLA
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS at Mesa Falcon Field (KFFZ) measured a 63 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 18:55:00 to 10-JUL-21 18:55:00 (MST-7)
Location: CAREFREE
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station SRP19 at 16.2 miles NE of Carefree measured a 68 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:10:00 to 10-JUL-21 20:10:00 (MST-7)
Location: NORTONS CORNER
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Gilbert Police reported southbound lanes on Lindsay Road at Ray Road were blocked due to a downed power pole as a result of strong winds. Winds estimated around 60 mph and timing estimated from radar. No injuries reported.

Dust Storm in EAST VALLEY, ARIZONA
From 10-JUL-21 20:10:00 to 10-JUL-21 20:35:00 (MST-7)
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility briefly fell to 1/2 mile in blowing dust from a strong thunderstorm outflow boundary near Warner Road and Cooper Road in Gilbert. Visibility also fell to approximately 1/4 mile in blowing dust near US-60 and Highway-87. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:15:00 to 10-JUL-21 20:15:00 (MST-7)
Location: SUNNYSLOPE
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast report from local media showed a carport ripped away from a residence near Sahuaro Drive and 37th Drive due to strong winds in a severe warned thunderstorm. The carport flew into an alley behind the residence, knocking over a cinderblock wall and shattering the window of a residence on the other side of the alley. Winds were estimated around 55-65 mph and timing was estimated from radar. No injuries reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:15:00 to 10-JUL-21 20:15:00 (MST-7)
Location: SUNNYSLOPE
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Video on social media shows the roof of a residential home was partially torn off due to strong thunderstorm winds near 43rd Avenue and Cactus Road. Winds estimated around 60 mph and timing estimated from radar. No injuries reported.

Thunderstorm Wind in PINAL, ARIZONA
From 10-JUL-21 19:46:00 to 10-JUL-21 19:46:00 (MST-7)
Location: MAGMA
Magnitude: 52.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nearly 40 trees were uprooted around the Johnson Ranch subdivision in San Tan Valley due to strong winds during a severe warned thunderstorm. Some trees reportedly fell on roofs, fences, and concrete walls with unknown degrees of damage. Minor roof damage was also reported. In a separate report, at an unspecified location in San Tan Valley, photos show strong winds peeled up a portion of a residential roof and a large section of a bedroom ceiling collapsed. Winds were estimated around 55-65 mph. Timing based on radar. No injuries reported.

Thunderstorm Wind in PINAL, ARIZONA
From 10-JUL-21 20:35:00 to 10-JUL-21 20:35:00 (MST-7)
Location: BON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS at Ak-Chin Regional Airport (KA39) measured a 60 mph wind gust.

Dust Storm in NORTHWEST PINAL COUNTY, ARIZONA
From 10-JUL-21 20:15:00 to 10-JUL-21 20:35:00 (MST-7)
Crop damage: 0.00K
Reported by: Storm Chaser

A photo on social media showed near zero visibility from blowing dust near I-8 and Trekel Road in Casa Grande, generated by a strong thunderstorm outflow boundary with observed wind gusts up to 60-65 mph. Another social media post showed less than 1/4 mile visibility in nearby Arizona City. No damage of injuries were reported.

Thunderstorm Wind in GILA, ARIZONA
From 10-JUL-21 18:45:00 to 10-JUL-21 18:45:00 (MST-7)
Location: RADIUM
Magnitude: 53.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Trained Spotter

Cement tiles were blown off a roof, and a grill, propane tank, and heavy iron table were blown over in a severe warned thunderstorm. A 61 mph wind gust was measured by a home weather station at this location. Timing based on radar. No injuries were reported.

Dust Storm in CAVE CREEK/NEW RIVER, ARIZONA
From 10-JUL-21 19:20:00 to 10-JUL-21 19:30:00 (MST-7)
Crop damage: 0.00K
Reported by: Trained Spotter

Report of visibility briefly falling to near zero miles in blowing dust from a thunderstorm outflow near Carefree Highway and 3rd Street in North Phoenix. No damages or injuries were reported.

Hail in MARICOPA, ARIZONA
From 10-JUL-21 20:15:00 to 10-JUL-21 20:15:00 (MST-7)
Location: QUEEN CREEK
Magnitude: 1.00 
Reported by: Public

Video on social media showed hail of various sizes falling in Queen Creek near Ocotillo Rd. with the largest hail stones estimated by the user at 1 inch diameter. No damages or injuries were reported.

Dust Storm in SONORAN DESERT NATL MONUMENT, ARIZONA
From 10-JUL-21 20:53:00 to 10-JUL-21 21:10:00 (MST-7)
Crop damage: 0.00K
Reported by: Storm Chaser

A photo on social media showed a large wall of dust moving west along I-8 near Vekol Road exit. Estimated visibility within the dust storm was less than 1/4 mile. No damage or injuries were reported.

Thunderstorm Wind in PINAL, ARIZONA
From 10-JUL-21 19:40:00 to 10-JUL-21 19:40:00 (MST-7)
Location: MAGMA
Magnitude: 56.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Public

Numerous social media photos and reports of significant damage the the Skyline RV Resort, east of San Tan, due to strong thunderstorm winds. Photos show awning, roof, and side panel damage to a few mobile homes. The number of RVs and mobile homes damaged is unknown. An awning and a shed for one home were destroyed, along with a broken window, and a large portion of metal roof blew off from another. A few street signs were bent in half in the community. There was also a photo of a power pole in the area that snapped near the base of the pole and fell. Power was knocked out to many customers in the area. Winds were estimated around 60-65 mph. Timing estimated from radar. No injuries reported.

Dust Storm in CAVE CREEK/NEW RIVER, ARIZONA
From 10-JUL-21 19:15:00 to 10-JUL-21 19:25:00 (MST-7)
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility fell to less than 500 feet briefly in blowing dust from a thunderstorm outflow near Long Cove Way and Pumpkin Ridge Drive in Anthem. No damages or injuries were reported.

Thunderstorm Wind in PINAL, ARIZONA
From 10-JUL-21 19:47:00 to 10-JUL-21 19:47:00 (MST-7)
Location: BAPCHULE
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Significant damage to a dog sanctuary near Phillips and Royce Roads in San Tan Valley due to estimated 55 to 65 mph wind gusts from a severe warned thunderstorm. A few couple hundred pound dog sheds were destroyed and one fell over and injured the paw of one of the dogs, named Chuckles, requiring surgery. Timing estimated from radar.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 22:03:00 to 10-JUL-21 22:03:00 (MST-7)
Location: (GBN)GILA BEND MUNI
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS at Gila Bend Air Force Auxiliary Field (KGXF) measured a 61 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 19:30:00 to 10-JUL-21 19:30:00 (MST-7)
Location: SUNFLOWER
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station SRP20 at Bartlett Dam measured a 60 mph wind gust.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 20:01:00 to 10-JUL-21 20:01:00 (MST-7)
Location: CHANDLER HGTS
Magnitude: 52.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Gilbert Police closed Riggs Road between Val Vista Drive and Adora Boulevard due to downed powerlines. Winds were estimated around 60 mph and timing was estimated from radar. No injuries were reported.

Dust Storm in GILA BEND, ARIZONA
From 10-JUL-21 21:15:00 to 10-JUL-21 21:30:00 (MST-7)
Crop damage: 0.00K
Reported by: Storm Chaser

A photo on social media taken near mile post 118 on I-8 showed a large wall of dust/haboob moving west into the Gila Bend area. Visibility in the blowing dust was estimated less than 1/2 mile. No damage or injuries were reported.

Dust Storm in NORTHWEST PINAL COUNTY, ARIZONA
From 10-JUL-21 19:40:00 to 10-JUL-21 19:55:00 (MST-7)
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported high winds and that visibility fell below 1/4 mile in blowing dust with a strong thunderstorm outflow boundary near the San Tan Valley. No damages or injuries were reported.

Dust Storm in GILA BEND, ARIZONA
From 10-JUL-21 22:10:00 to 10-JUL-21 22:25:00 (MST-7)
Crop damage: 0.00K
Reported by: Social Media

A video on social media showed near zero visibility in blowing dust near I-8 and Paloma Road with a strong thunderstorm outflow boundary from the southeast. This was a different outflow boundary than the one that brought a haboob into the Gila bend area an hour earlier. No damage or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 10-JUL-21 19:40:00 to 10-JUL-21 19:40:00 (MST-7)
Location: CAVE CREEK
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 15-20 foot long section of a concrete brick wall was blown over from strong winds near Carefree Highway and 7th Street in North Phoenix during a severe warned thunderstorm. Wind gusts were estimated around 55-65 mph. Timing estimated from radar. No injuries reported.