Thunderstorms developed along the Mogollon Rim during the early part of the afternoon on the 9th. Relatively strong easterly mid level anticyclonic flow associated with the upper level ridge centered near the Arizona/Utah state line helped allow strong to severe thunderstorms to propagate westward into the lower deserts. The severe thunderstorms led to damaging winds gusts upwards of 60-65 mph across southeast portions of the Phoenix metro. Thee severe winds ahead of the thunderstorms also produced a dust storm that led to widespread reports of dense blowing dust across central and southeastern Phoenix and as far south as Casa Grande. A few isolated instances of flash flooding occurred as well, including the recent Telegraph burn scar where over 0.75 of rain fell. There were numerous reports of damage across eastern parts of the Valley, including numerous power poles and large trees down. No injuries were reported with these thunderstorms.

Flash Flood in GILA, ARIZONA
From 09-JUL-21 21:50:00 to 09-JUL-21 22:50:00 (MST-7)
Location: GLOBE
Flood cause: Heavy Rain / Burn Area
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Heavy rainfall combined with enhanced runoff from the recent Telegraph burn scar led to flooding across Ice House Canyon road in Ice House Canyon. Images from Forest Service officials showed a considerable amount of debris on the banks of the wash with some debris covering the surface of the road. No injuries or damage were reported.

Thunderstorm Wind in PINAL, ARIZONA
From 09-JUL-21 21:57:00 to 09-JUL-21 22:04:00 (MST-7)
Location: FLORENCE JCT
Magnitude: 56.00 EG
Property damage: 56.00K
Crop damage: 0.00K
Reported by: Utility Company

Severe thunderstorms moving off the higher terrain and into the lower deserts led to damaging wind gusts upwards of 60-65 mph around the Gold Canyon area. The damaging winds resulted in 28 distribution poles being knocked down along Highway 60 at MP 206. No injuries were reported.

Dust Storm in CENTRAL PHOENIX, ARIZONA
From 09-JUL-21 22:50:00 to 09-JUL-21 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Severe thunderstorms produced a strong outflow boundary that brought a dust storm through portions of Phoenix, leading to multiple reports of dense blowing dust. At 2250MST, the Phoenix Sky Harbor airport ASOS (KPHX) recorded a quarter mile visibility due to blowing dust with a peak gust of 46 mph. Further west, a trained weather spotter reported visibility less than a quarter mile near 15th Avenue and Van Buren Street. Another trained weather spotter near Central Avenue and Palm Lane also reported visibility less than a quarter mile with skyscrapers in downtown Phoenix not visible.

Dust Storm in SOUTHEAST GILA COUNTY, ARIZONA
From 09-JUL-21 22:10:00 to 09-JUL-21 22:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorms sent strong outflow winds through southeastern parts of the Valley during the evening on the 9th, creating a dust storm that led to multiple reports of dense blowing dust. At 2210MST, a trained weather spotter reported visibility less than a quarter mile in the Queen Creek area. Further to the west at 2228MST, a trained weather spotter reported low visibility less than a quarter mile near Riggs Road and Gilbert Road. No accidents or injuries were reported.

Thunderstorm Wind in GILA, ARIZONA
From 09-JUL-21 21:18:00 to 09-JUL-21 21:18:00 (MST-7)
Location: MIAMI
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter in Miami, AZ reported that severe thunderstorms knocked down a mature apple tree onto a church parking lot near Sullivan Street and Davis Canyon Road. No injuries were reported.

Thunderstorm Wind in PINAL, ARIZONA
From 09-JUL-21 22:35:00 to 09-JUL-21 22:35:00 (MST-7)
Location: CASA GRANDE
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Desert Basin SRP mesonet station in Casa Grande recorded a peak gust of 63 mph as severe thunderstorms moved through the area.

Thunderstorm Wind in PINAL, ARIZONA
From 09-JUL-21 22:32:00 to 09-JUL-21 22:32:00 (MST-7)
Location: CASA GRANDE ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Casa Grande Municipal Airport AWOS station (KCGZ) recorded a peak gust of 58 mph as severe thunderstorms moved through the area.

Thunderstorm Wind in MARICOPA, ARIZONA
From 09-JUL-21 22:10:00 to 09-JUL-21 22:10:00 (MST-7)
Location: (CHD)WILLIAMS AFB
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Phoenix-Mesa Gateway Airport AWOS station (KIWA) recorded a peak gust of 60 mph as severe thunderstorms moved through the area.

Thunderstorm Wind in PINAL, ARIZONA
From 09-JUL-21 22:10:00 to 09-JUL-21 22:20:00 (MST-7)
Location: MAGMA
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorms with measured winds upwards of 65 mph led to multiple reports of damage across San Tan Valley. At 2210MST, a trained weather spotter reported that numerous large trees 1-2 feet in diameter had been uprooted near Amira Park and in Johnson Ranch. Multiple downed trees were also reported in the Circle Cross Ranch and the Morning Sun Farms areas. Multiple power poles were reported down as well along Skyline Drive. No injuries were reported.

Thunderstorm Wind in PINAL, ARIZONA
From 09-JUL-21 22:14:00 to 09-JUL-21 22:14:00 (MST-7)
Location: MAGMA
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Quail SRP mesonet station recorded a peak gust of 65 mph as severe thunderstorms ripped through the San Tan Valley area.

Thunderstorm Wind in MARICOPA, ARIZONA
From 09-JUL-21 22:15:00 to 09-JUL-21 22:15:00 (MST-7)
Location: BOYS RANCH
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An emergency management official reported damaging wind gusts ripped swamp coolers off of a couple of buildings at the Queen Creek Field Operations Facility and also bent some rolled up garage doors. A fire sprinkler was also damaged in a building causing the sprinkler to go off. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 09-JUL-21 22:20:00 to 09-JUL-21 22:20:00 (MST-7)
Location: QUEEN CREEK
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Rittenhouse SRP mesonet station in Queen Creek recorded a peak gust of 61 mph as severe thunderstorms moved through the area.

Thunderstorm Wind in PINAL, ARIZONA
From 09-JUL-21 22:15:00 to 09-JUL-21 22:15:00 (MST-7)
Location: MAGMA
Magnitude: 50.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The roof of a mobile home was ripped off as severe thunderstorms moved through the Queen Creek area while a family of 4 were inside. Much of the interior property was destroyed from the wind and the rainwater that entered the home. The home suffered additional damage the following night when more severe winds blew through the area. The home is a total loss. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 10-JUL-21 02:30:00 to 10-JUL-21 03:30:00 (MST-7)
Location: GILA BEND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorms produced locally heavy rainfall late in the evening on the 9th near midnight across southern portions of Maricopa County and western portions of Pinal County. According to the Arizona Department of Transportation, the flood prone Highway 238 was closed due to flooding. No injuries or damage was reported as a result of the flooding.

Thunderstorm Wind in MARICOPA, ARIZONA
From 09-JUL-21 22:32:00 to 09-JUL-21 22:32:00 (MST-7)
Location: GILBERT
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

Damaging wind gusts from severe thunderstorms resulted in a large uprooted tree on a playground in a park near Greenfield Road and Warner Road. No injuries were reported.

Dust Storm in EAST VALLEY, ARIZONA
From 09-JUL-21 22:30:00 to 09-JUL-21 22:40:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorms producing estimated gusts upwards of 60-65 mph resulted in numerous reports of dense blowing dust across the East Valley on the evening of the 9th. Multiple trained weather spotters reported visibility falling below a quarter of a mile. No accidents or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 09-JUL-21 22:15:00 to 09-JUL-21 22:15:00 (MST-7)
Location: MAGMA
Magnitude: 56.00 EG
Property damage: 65.00K
Crop damage: 0.00K
Reported by: Broadcast Media

At least 30-40 large trees were knocked down due to severe thunderstorms at Schnepf Farms in Queen Creek. Five of the eight greenhouses received damage with damage occurring to crops such as tomatoes, squash, and peppers. A wedding was ongoing at the farm as the severe thunderstorms hit. No injuries were reported. Estimates for the crop damage that occurred are unavailable. Timing was estimated from radar and nearby observations.

Thunderstorm Wind in MARICOPA, ARIZONA
From 09-JUL-21 22:32:00 to 09-JUL-21 22:32:00 (MST-7)
Location: CHANDLER HGTS
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter reported a roughly 60ft by 20ft metal sheeted roof blew off a port structure and landed across the street, taking out a couple street signs and a chain link fence, at Riggs and Val Vista. Additionally, 8 inch diameter branches snapped from a palo verde tree and fell onto the roof of a house near Lindsay Road and Chandler Heights Road. No injuries were reported.

Dust Storm in NORTHWEST PINAL COUNTY, ARIZONA
From 09-JUL-21 22:25:00 to 09-JUL-21 22:40:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorms on the evening of the 9th sent a strong outflow boundary across the lower deserts of northwestern Pinal County, creating a dust storm with low visibility reported near Casa Grande. At 2229MST, a trained weather spotter reported visibility below a quarter mile due to dense blowing dust at I-10 and Val Vista Boulevard. No accidents or injuries were reported.