High pressure aloft was centered over central Arizona on July 19th. Numerous thunderstorms rotated around this upper high, and affected much of southeast Arizona during the afternoon and evening hours.  Afternoon and early evening storms impacted mainly Cochise and Santa Cruz counties, with late evening and early morning storms impacting the Tucson metro area.

Lightning in PIMA, ARIZONA
From 20-JUL-10 01:00:00 to 20-JUL-10 01:00:00 (MST-7)
Location: CASAS ADOBES
Property damage: 80.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike caused a house fire during the early morning hours of July 20th.  The lightning strike likely occurred around 1 AM as storms impacted north Tucson, with the sparks smoldering in the roof's insulation until a neighbor noticed the fire spreading around 5 AM. The fire resulted in extension damage to the home before the fire was extinguished.

Lightning in PIMA, ARIZONA
From 19-JUL-10 17:30:00 to 19-JUL-10 17:30:00 (MST-7)
Location: CONTINENTAL
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck palm tree in the front yard of a home on Abrego Road, which spread to other nearby trees.

Thunderstorm Wind in COCHISE, ARIZONA
From 19-JUL-10 17:30:00 to 19-JUL-10 18:00:00 (MST-7)
Location: DRAGOON
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported wind damage to awnings of a residence near Dragoon. The Willcox sheriff reported a horse was killed near Cochise, after a downed power line electrocuted the animal.

Thunderstorm Wind in COCHISE, ARIZONA
From 19-JUL-10 17:00:00 to 19-JUL-10 18:00:00 (MST-7)
Location: BOWIE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Willcox sheriff reported that thunderstorm winds blew down an outbuilding in Bowie.

Thunderstorm Wind in COCHISE, ARIZONA
From 19-JUL-10 17:56:00 to 19-JUL-10 18:25:00 (MST-7)
Location: DOUGLAS
Magnitude: 59.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Bisbee-Douglas Airport measured a wind gust of 68 mph at 556 pm MST. Law enforcement reported that thunderstorm winds blew a roof off a residence on Double Adobe Road, approximately 7 miles west of the Bisbee-Douglas Airport.  The Bisbee sheriff reported thunderstorm winds blew a roof completely off a large barn along Burnt Adobe Road, and snapped four power poles. A tree was uprooted and fell on a building at the Douglas Municipal Airport.

Thunderstorm Wind in PIMA, ARIZONA
From 19-JUL-10 23:10:00 to 20-JUL-10 00:10:00 (MST-7)
Location: CASAS ADOBES
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm downburst winds caused wind damage across portions of the Tucson metro area. Several trees and power lines were downed near the intersection of Ina and Oracle Roads, and the winds caused some minor roof damage in this area as well.  Another power pole was downed near Ajo Way and 6th Avenue, and also near Glenn and Alvernon Way. Small trees were reported in the road near the intersection of Grant and Wilmot.

Thunderstorm Wind in SANTA CRUZ, ARIZONA
From 19-JUL-10 15:00:00 to 19-JUL-10 16:00:00 (MST-7)
Location: CALABASAS
Magnitude: 65.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm microburst produced damaging winds in Rio Rico.  A portion of a home's roof was blown off, and brought down a power line as it landed in Rio Rico Drive.  Thunderstorm winds also blew down several dying trees between the Santa Cruz River bridge and the railroad tracks, and blew down a cyprus tree onto the roof of a home on East Rio Rico Drive.  Winds were measured on a neighbor's anemometer at 75 mph.

Flash Flood in COCHISE, ARIZONA
From 19-JUL-10 18:00:00 to 19-JUL-10 20:00:00 (MST-7)
Location: DOUGLAS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms produced heavy rainfall that resulted in flash flooding across portions of Cochise County. An automated rain gauge 3 miles southeast of Dragoon reported 2.6 inches of rain in less than 50 minutes.  A vehicle stranded in Terry's Wash was pulled out of the wash by a trained spotter.  Two people stranded in Prude Wash from their vehicle were assisted by the Cochise County sheriff.  Prude Wash, which is normally dry, was running about 3 feet deep.