High pressure aloft was centered in northeast Arizona on July 17th, with a favorable easterly or southeasterly steering flow across southeast Arizona.  Plentiful moisture resulted in ample instability, and several scattered thunderstorms produced damaging wind gusts.

Thunderstorm Wind in PIMA, ARIZONA
From 17-JUL-10 18:10:00 to 17-JUL-10 18:10:00 (MST-7)
Location: SELLS
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported windows blown out of a house in Sells.

Thunderstorm Wind in SANTA CRUZ, ARIZONA
From 17-JUL-10 15:00:00 to 17-JUL-10 15:10:00 (MST-7)
Location: ELGIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorms resulted in tree limbs eight inches in diameter downed near Elgin.

Thunderstorm Wind in GREENLEE, ARIZONA
From 17-JUL-10 16:00:00 to 17-JUL-10 16:30:00 (MST-7)
Location: DUNCAN
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Severe thunderstorm winds caused damage near the village of Sheldon in Greenlee County. Several trees were uprooted, and a backyard trampoline was blown 100 yards by the thunderstorm winds.  Doors of mobile homes were blown inward.

Thunderstorm Wind in COCHISE, ARIZONA
From 17-JUL-10 14:20:00 to 17-JUL-10 14:20:00 (MST-7)
Location: HUACHCA VLG
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS at Pioneer Airfield measured a thunderstorm wind gust of 66 mph at 220 PM MST.

Lightning in COCHISE, ARIZONA
From 17-JUL-10 14:45:00 to 17-JUL-10 14:45:00 (MST-7)
Location: SIERRA VISTA
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a home in Sierra Vista, and caused a fire near the kitchen stove.

Lightning in COCHISE, ARIZONA
From 17-JUL-10 20:40:00 to 17-JUL-10 20:40:00 (MST-7)
Location: SIERRA VISTA
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a home, causing a fire in the attic.  The home was unoccupied at the time, and there were no injuries.

Thunderstorm Wind in PIMA, ARIZONA
From 17-JUL-10 17:00:00 to 17-JUL-10 18:00:00 (MST-7)
Location: VAIL
Magnitude: 61.00 EG
Property damage: 55.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Severe thunderstorm winds caused damage across southern portions of Tucson.  A trained spotter reported several trees downed near Rita Ranch at 5 PM MST.  Power lines were reported down by the winds at two different locations near the Tucson International Airport.  Thunderstorm winds ripped the roof off a mobile home near the intersection of Interstate 19 and Valencia Road.  In addition, several other trees and power lines were downed by the thunderstorm winds across southwest portions of Tucson.  One of these trees was downed on a residence.

Thunderstorm Wind in SANTA CRUZ, ARIZONA
From 17-JUL-10 14:00:00 to 17-JUL-10 14:29:00 (MST-7)
Location: RIO RICO
Magnitude: 52.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorm winds impacted much of Santa Cruz County.  Law enforcement reported a tree was downed by the winds near the intersection of State Highway 82 and Duquesne Road.  A trained spotter measured a wind gust of 60 mph near Rio Rico, and another trained spotter measured a wind gust of 58 mph at Nogales.