A return to favorable monsoon conditions, including abundant moisture and a disturbance, brought strong thunderstorms and heavy rain to southern Arizona.

Thunderstorm Wind in PIMA, ARIZONA
From 15-AUG-10 17:55:00 to 15-AUG-10 18:15:00 (MST-7)
Location: ORO VLY
Magnitude: 56.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Employee

Local broadcast media reported up to 3 dozen trees damaged or uprooted in Rancho Vistoso neighborhood.  A few ceramic roof tiles were also blown off homes.  In addition, a NWS Employee reported several trees down in Dove Mountain with one tree leaning up against a home.  There was only slight tile damage to the home.  Also, local broadcast media reported trees and power lines down in Marana at Interstate 10 and Marana/Trico Road as well as a roof ripped off a mobile home. The Marana Airport also sustained damage.  Two small airplanes were ripped from their tie down chains and were flipped over while another plane was blown into a field. A large hangar door was blown off its tracks and a few other hangars also sustained light damage.  In the same area, several power poles and lines were downed on Twin Peaks Road east of N. Sandario Road.

Thunderstorm Wind in PIMA, ARIZONA
From 15-AUG-10 17:00:00 to 15-AUG-10 17:10:00 (MST-7)
Location: JAYNES
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms developed and moved across southern portions of Tucson producing 50 mph winds at the Tucson International Airport, but no damage was reported.  Storms moved to the northwest through western portions of Tucson with an outflow racing out in advance.  Damage occurred to six saguaro cacti, one which was over 35 feet tall, at El Camino De Cerro and the Tucson Mountains.  Tucson weather observation site CW8334, which is 5 miles southeast of the damage, recorded a wind gust of 42 mph at 5:09 pm.  Based on damage and stronger velocities where the damage was reported, winds were estimated to be about 50 mph.

Hail in SANTA CRUZ, ARIZONA
From 15-AUG-10 19:50:00 to 15-AUG-10 20:05:00 (MST-7)
Location: ELGIN
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 75.00K
Reported by: Public

An owner of a grape vineyard in Elgin reported hail for 15 minutes with the largest being golf ball size (1.75).  Damage to the vineyard was extensive, with nearly all the 2010 grape crop lost.  Crop losses at this one vineyard were estimated at six tons which translated to between 10 and 15 thousand dollars, ultimately resulting in a loss of wine valued at 100 to 150 thousand dollars.  Extensive damage was also sustained at other vineyards in area.  Hail also dented vehicles and broke their windows.

Thunderstorm Wind in PIMA, ARIZONA
From 15-AUG-10 20:00:00 to 15-AUG-10 20:10:00 (MST-7)
Location: SABINO
Magnitude: 52.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Broadcast Media

An isolated severe thunderstorm produced a downburst in the vicinity of Snyder Road and Houghton Road downing several power poles and lines.

Flash Flood in COCHISE, ARIZONA
From 15-AUG-10 21:49:00 to 15-AUG-10 23:00:00 (MST-7)
Location: FAIRBANK
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported Brewery Gulch and several streets flooded in Old Town Bisbee and Banning Creek northwest of Bisbee also flooded.  In addition, flooding damaged fiber-optic lines near Tombstone.

Hail in COCHISE, ARIZONA
From 15-AUG-10 21:40:00 to 15-AUG-10 21:40:00 (MST-7)
Location: BISBEE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported penny size hail covering the ground at mule tunnel northwest of Bisbee.

Thunderstorm Wind in SANTA CRUZ, ARIZONA
From 15-AUG-10 19:50:00 to 15-AUG-10 20:10:00 (MST-7)
Location: ELGIN
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

This report goes along with thunderstorm which produced 1.75 inch diameter hail in Elgin.  Just before and during the storm, the vineyard owner reported an estimate of at least 60 mph winds.  Damage was limited to farm structures and not dwellings.