Favorable monsoonal conditions promoted the development of severe thunderstorms across the region on the 18th. Abundant moisture (PWATs of 1.7-2.0) and instability (MUCAPE 1,000-2,000 J/kg) was in place across south-central and southwest Arizona, while increased easterly steering flow from an upper level low over northern Mexico aided in thunderstorms propagating off the high terrain. DCAPE were around 1,000-1,200 J/kg which helped in allowing strong to severe thunderstorms to produce damaging winds from downbursts. Thunderstorms initially developed along the Mogollon Rim during the early afternoon hours before pushing into the lower deserts of south-central and southwest Arizona through the evening. No injuries were reported.

Dust Storm in YUMA, ARIZONA
From 18-AUG-22 21:35:00 to 18-AUG-22 21:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Dense blowing dust resulted in visibility dropping below 1/4 mile near I-8 and Fortuna Road. No accidents or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 18-AUG-22 19:35:00 to 18-AUG-22 20:35:00 (MST-7)
Location: CAVE CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A video showed flooding on 14th Street south of Carefree Highway, impacting travel on the roadway. No damage or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 18-AUG-22 21:12:00 to 18-AUG-22 22:12:00 (MST-7)
Location: GLENDALE MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flooding at 59th Avenue and Greenway Road caused the roadway to become impassable. No damage or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 18-AUG-22 19:00:00 to 18-AUG-22 20:00:00 (MST-7)
Location: CAREFREE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MCDOT reported Bartlett Dam Road at Cave Creek road was closed due to flooding. No damage or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 18-AUG-22 17:25:00 to 18-AUG-22 17:25:00 (MST-7)
Location: CAREFREE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet station (SRP19) at Horseshoe Dam measured a 59 mph gust.

Flash Flood in MARICOPA, ARIZONA
From 18-AUG-22 18:30:00 to 18-AUG-22 20:30:00 (MST-7)
Location: NEW RIVER
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Daisy Mountain Fire and Medical reported a swift water rescue on Country Road near New River Road after a person attempted to cross a flooded low water crossing. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 18-AUG-22 20:45:00 to 18-AUG-22 20:45:00 (MST-7)
Location: SUN CITY
Magnitude: 61.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Public

Several images showed downed power lines and multiple snapped power poles along Cactus Road between 91st Avenue and 83rd Avenue. Most poles were wooden, but there was at least one metal pole that fell down across the road. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 18-AUG-22 20:10:00 to 18-AUG-22 20:10:00 (MST-7)
Location: PHOENIX TURF ARPT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Images showed several trees and branches down at an apartment complex near 43rd Avenue and Bell Road. A couple of carports were damaged from the downed trees. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 18-AUG-22 17:46:00 to 18-AUG-22 17:46:00 (MST-7)
Location: BUCKEYE MUNI ARPT
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Images showed several snapped power poles in the area of Johnson Road and Yuma Road. Downed trees were also reported in the area. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 18-AUG-22 20:46:00 to 18-AUG-22 20:46:00 (MST-7)
Location: SUN CITY
Magnitude: 61.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Public

Images showed a destroyed carport with the metal roofing blown into nearby power lines at a mobile home community. Other images showed several large power poles tilted over along 91st Avenue north of Peoria Avenue. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 18-AUG-22 20:22:00 to 18-AUG-22 20:22:00 (MST-7)
Location: WADDELL
Magnitude: 48.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

Several small trees were knocked over near Reems Road and Cactus Road. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in YUMA, ARIZONA
From 18-AUG-22 19:06:00 to 18-AUG-22 19:06:00 (MST-7)
Location: HYDER
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Utility Company

Power poles were reported down in Hyder near Palomas Road. Timing estimated from radar. No injuries were reported.