Similar to the 20th, thunderstorms once again initiated across the northern Arizona high terrain during the afternoon of the 21st, though more focused along the Mogollon Rim compared to the day prior. Increased steering flow allowed for thunderstorms to move off of the Rim and toward the lower elevations. High instability (MUCAPE 2,000-2,500 J/kg) helped thunderstorms maintain intensity as they travelled toward the lower deserts. Given the greater steering flow, faster thunderstorm motion helped abate flash flood impacts. Greater shear across northwest Arizona allowed an organized complex of thunderstorms to develop during the evening hours before progressing through southwest Arizona and the Lower Colorado River Valley area, producing severe wind gusts and dense blowing dust into the early morning hours on the 22nd. No injuries were reported.

Thunderstorm Wind in YUMA, ARIZONA
From 22-AUG-22 01:07:00 to 22-AUG-22 01:07:00 (MST-7)
Location: FISHERS LNDG
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Yuma Proving Ground Station 33 mesonet recorded a 58 mph gust.

Thunderstorm Wind in YUMA, ARIZONA
From 22-AUG-22 01:08:00 to 22-AUG-22 01:08:00 (MST-7)
Location: FISHERS LNDG
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Utility Company

A shed was blown into nearby power lines, causing a power pole to come down. Timing estimated from radar. No injuries were reported.

Flood in GILA, ARIZONA
From 21-AUG-22 17:00:00 to 22-AUG-22 08:00:00 (MST-7)
Location: PUNKIN CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A video showed high flow in Tonto Creek made unbridged crossings across the creek impassable. An upstream USGS stream gage along the creek climbed above action stage, peaking at a depth of 5.62 feet at 1915MST. No damage or injuries were reported.

Thunderstorm Wind in YUMA, ARIZONA
From 22-AUG-22 00:56:00 to 22-AUG-22 00:56:00 (MST-7)
Location: MARTINEZ LAKE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Yuma Proving Ground Station 173 mesonet recorded a 58 mph gust.

Thunderstorm Wind in YUMA, ARIZONA
From 22-AUG-22 01:39:00 to 22-AUG-22 01:39:00 (MST-7)
Location: YUMA
Magnitude: 52.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Utility Company

Power poles were reported down near 12th Street and Pacific Avenue. Timing estimated from radar. No injuries were reported.

Dust Storm in PARKER VALLEY, ARIZONA
From 21-AUG-22 22:38:00 to 21-AUG-22 22:58:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

ADOT webcams in Parker showed near zero visibility due to dense blowing dust. No accidents or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 21-AUG-22 18:11:00 to 21-AUG-22 18:11:00 (MST-7)
Location: SCOTTSDALE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A large tree fell between two parked vehicles at a condominium at Roosevelt Street and Granite Reef Road. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in LA PAZ, ARIZONA
From 22-AUG-22 00:54:00 to 22-AUG-22 00:54:00 (MST-7)
Location: CIBOLA
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Yuma Proving Ground Station 6 mesonet recorded a 64 mph gust.

Thunderstorm Wind in YUMA, ARIZONA
From 22-AUG-22 01:03:00 to 22-AUG-22 01:03:00 (MST-7)
Location: FISHERS LNDG
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Yuma Proving Ground Station 17 mesonet recorded a 61 mph gust.