A mid-level high pressure was situated across southern Nevada, with the local area under an northeasterly flow regime. At upper-levels, a disturbance moving northward out northern Baja California resulted in a diffluent flow, favorable for vertical ascent. The moisture and instability parameters were conducive to thunderstorm activity with PWATs 1.5+ inches and MLCAPE values ranging between 1500-2500 J/KG. As it is typical in a northeasterly flow regime, thunderstorms first began to develop along the Mogollon Rim early afternoon and then descended into the lower elevations during the mid to late afternoon hours, affecting the Greater Phoenix area and then tracking southwestward, affecting southwestern Arizona through the early evening hours.

Dust Storm in CENTRAL LA PAZ, ARIZONA
From 23-AUG-22 19:49:00 to 23-AUG-22 20:09:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Near zero visibility at times along I-10 just west of Quartzsite due to blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Flash Flood in PINAL, ARIZONA
From 23-AUG-22 16:30:00 to 23-AUG-22 17:30:00 (MST-7)
Location: PALM SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Flood Control District of Maricopa County Stream Gauge along Apache Trail in Apache Junction broke Alarm Stage at around 1630 MST, with flow peaking at 1.15 feet (38 cfs). This likely caused the intersection of 4th Avenue and Royal Palm Avenue to become impassable. No damages or injuries were reported.

Flash Flood in LA PAZ, ARIZONA
From 23-AUG-22 20:52:00 to 23-AUG-22 22:52:00 (MST-7)
Location: QUARTZSITE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

West Quail Trail Street and West Tyson Street closed due to flooding, with the flooding most likely coming from Tyson Wash. Timing estimated from radar. No damages or injuries were reported.

Dust Storm in GILA RIVER VALLEY, ARIZONA
From 23-AUG-22 21:35:00 to 23-AUG-22 21:55:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility of 1/4 mile reported near Tacna in blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Dust Storm in EAST VALLEY, ARIZONA
From 23-AUG-22 16:32:00 to 23-AUG-22 16:52:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility of less than 1/4 mile reported along Loop-202 near South Val Vista Drive in Gilbert in blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Dust Storm in CENTRAL LA PAZ, ARIZONA
From 23-AUG-22 19:09:00 to 23-AUG-22 19:29:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility of less than 1/4 mile reported along I-10, west of Hovatter Road in blowing dust from thunderstorm outflow. No accidents or injuries were reported.

Flash Flood in LA PAZ, ARIZONA
From 23-AUG-22 19:30:00 to 23-AUG-22 21:30:00 (MST-7)
Location: UTTING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

McVay Road, just south of SR-72, was impassable to cars due to flooding. Timing estimated from radar. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 23-AUG-22 17:07:00 to 23-AUG-22 17:07:00 (MST-7)
Location: GLENDALE MUNI ARPT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A social media video shows a large tree was toppled and damaged some concrete and metal fencing at a residence near Peoria Ave. and 46th Ave. Winds were estimated at 55-60 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 23-AUG-22 17:10:00 to 23-AUG-22 17:10:00 (MST-7)
Location: GLENDALE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Social media picture showed a very large uprooted tree in between two residential complexes and destroyed a fence along North 44th Avenue just south of West Glendale Avenue in Glendale. Winds were estimated at 55-60 mph. No injuries were reported.

Dust Storm in CENTRAL LA PAZ, ARIZONA
From 23-AUG-22 18:52:00 to 23-AUG-22 19:22:00 (MST-7)
Crop damage: 0.00K
Reported by: Department of Highways

Arizona Department of Transportation reported a crash along I-10 near Milepost 69, that was suspected to be attributed to blowing dust from thunderstorm outflow with visibilities falling less than 1/4 mile. A few storm chasers were also nearby on I-10, one with a photo of vehicles stopped in near zero visibility, one with a video showing dust first crossing I-10 near Milepost 67 and quickly falling to near zero visibility, and another stopped along I-10 near Milepost 77 in near zero visibilities. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 23-AUG-22 17:19:00 to 23-AUG-22 17:19:00 (MST-7)
Location: GLENDALE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed powerlines affecting 83 customers were reported in an area between North 43rd Avenue to North 35th Avenue and Bethany Home Road to West Missouri Avenue in Glendale. Winds were estimated at 55-60 mph. No injuries were reported.

Dust Storm in KOFA, ARIZONA
From 23-AUG-22 20:12:00 to 23-AUG-22 20:32:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A Yuma proving ground station measured a visibility of less than 1/4 mile due to blowing dust in thunderstorm outflow.

Thunderstorm Wind in MARICOPA, ARIZONA
From 23-AUG-22 16:00:00 to 23-AUG-22 16:00:00 (MST-7)
Location: TWIN KNOLLS
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: County Official

East Tepee Street at Plaza and 16th Avenue near Valley and San Marcos in Apache Junction were closed due to debris and downed power poles. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 23-AUG-22 17:00:00 to 23-AUG-22 17:00:00 (MST-7)
Location: SUNNYSLOPE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Social media picture showed a large tree uprooted alongside a home located on the intersection of West Cinnabar Avenue and North 33rd Avenue in Glendale. Timing estimated from radar. Winds were estimated at 55-60 mph. No injuries were reported.

Hail in MARICOPA, ARIZONA
From 23-AUG-22 17:06:00 to 23-AUG-22 17:06:00 (MST-7)
Location: SUNNYSLOPE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickel size hail reported near the area of West Cactus Road and North 28th Drive in Glendale. No damages or injuries were reported.

Hail in MARICOPA, ARIZONA
From 23-AUG-22 17:20:00 to 23-AUG-22 17:20:00 (MST-7)
Location: GLENDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media video showed nickel to quarter-sized hail fell in the area between West Glendale Avenue and North 35th Avenue. Timing estimated from radar. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 23-AUG-22 22:36:00 to 24-AUG-22 00:36:00 (MST-7)
Location: TONOPAH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Flood Control District of Maricopa County stream gage along Jackrabbit Wash exceeded alarm stage at 2236 MST, making the Vulture Mine Road low water crossing impassable and mostly likely Wickenburg Road, located 5 miles downstream. Flow peaked at 3.35 feet and 1034 CFS at 2305 MST and dropped below alarm stage at 2340 MST. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 23-AUG-22 17:06:00 to 23-AUG-22 17:06:00 (MST-7)
Location: GLENDALE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed powerlines affecting 47 customers was reported in the area between 43rd Avenue and North 35th Avenue and West Northern Avenue to West Orangewood Avenue in Glendale. Winds were estimated at 55-60 mph. No injuries were reported.