Strong high pressure centered over the Great Basin and an inverted trough near the Arizona/Mexico international border promoted enhanced east/northeast steering flow favorable for maintaining thunderstorms off the high terrain into the lower elevations. A very moist and unstable atmosphere promoted the development of strong to severe thunderstorms that pushed off the high terrain of southern Gila County and into the lower deserts during the evening of the 15th. Several instances of damage were reported, which included multiple downed trees in the Mesa area. No injuries were reported.

Thunderstorm Wind in GILA, ARIZONA
From 15-AUG-21 21:35:00 to 15-AUG-21 21:35:00 (MST-7)
Location: ROOSEVELT GRPVN ARPT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Damaging wind gusts moving through the Roosevelt Lake area resulted in a metal carport roof being blown off. Wind gusts estimated to be between 50-60 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-AUG-21 22:48:00 to 15-AUG-21 22:48:00 (MST-7)
Location: BUCKHORN
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

A large pine tree approximately 2-3 feet in diameter fell on top of a garage and a vehicle near University Drive and Greenfield Road in Mesa. No injuries were reported. Timing was estimated using radar.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-AUG-21 22:44:00 to 15-AUG-21 22:44:00 (MST-7)
Location: MESA FALCON ARPT
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A picture on social media showed a large pine tree down at an apartment complex near McKellips Road and Higley Road in Mesa. Wind estimated to be between 50-60 mph based on nearby observations and radar. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-AUG-21 23:15:00 to 15-AUG-21 23:15:00 (MST-7)
Location: FALFA
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Photos on social media showed several large trees down along with damage to a playground in an area near Arizona Avenue between Elliot Road and Warner Road. A large tree estimated to be approximately 2-3 feet in diameter was uprooted at an apartment complex at Warner Road and Evergreen Street. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-AUG-21 22:53:00 to 15-AUG-21 22:53:00 (MST-7)
Location: BUCKHORN
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Multiple large pine trees and power poles were blown down at an apartment complex along University Drive between Val Vista Drive and Lindsay Road. Additional downed trees were reported in this area. No injuries were reported. Timing was estimated using radar.

Hail in MARICOPA, ARIZONA
From 15-AUG-21 21:50:00 to 15-AUG-21 22:00:00 (MST-7)
Location: TORTILLA FLAT
Magnitude: 0.30 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Public

Estimated pea-sized hail fell for approximately one hour and caused significant crop damage around the property of Reevis Mountain School. Most of the fruit trees were affected, with the peach and jujube harvests deemed total losses. Nearly an acre of vegetable leaves were shredded. Many of the walnuts and all pecans fell off their trees. Damage costs were not provided.