Increasing moisture interacted with an upper level shortwave trough to produce afternoon showers and thunderstorms. Some of the storms produced heavy rainfall and strong winds.

Hail in PIMA, ARIZONA
From 10-SEP-11 18:11:00 to 10-SEP-11 18:11:00 (MST-7)
Location: TUCSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy Rain in PIMA, ARIZONA
From 10-SEP-11 19:00:00 to 10-SEP-11 19:30:00 (MST-7)
Location: CORTARO
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rainfall resulted in two, single car accidents on Interstate 10 between Ina Road and Orange Grove Road due to hydroplaning. One person was taken to the hospital with minor injuries.

Hail in PINAL, ARIZONA
From 10-SEP-11 15:30:00 to 10-SEP-11 15:40:00 (MST-7)
Location: ORACLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PIMA, ARIZONA
From 10-SEP-11 18:11:00 to 10-SEP-11 18:25:00 (MST-7)
Location: SABINO
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds downed several trees in the Catalina Foothills. A large mesquite tree blocked the road at Rudasil and Tiburon Roads.

Thunderstorm Wind in PIMA, ARIZONA
From 10-SEP-11 17:32:00 to 10-SEP-11 17:45:00 (MST-7)
Location: (TUS)TUCSON INTL ARP
Magnitude: 57.00 MG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: ASOS

Strong thunderstorm winds occurred on Tucson's south side for the second day in a row, downing numerous power poles, electric lines, street signs, and trees. As many as 25,000 were left without power. One power pole was downed on a trailer leading to the evacuation of the trailer park near East Drexel and South Country Club Roads. Another Tucson resident woke up to a power pole entering the dwelling. Part of a roof was also blown off a residence on Valencia Road, blowing across the road into another home damaging the roof.

Flash Flood in PIMA, ARIZONA
From 10-SEP-11 19:00:00 to 10-SEP-11 21:00:00 (MST-7)
Location: SAN XAVIER
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rainfall resulted in rapid runoff and flash flooding on Tucson's south side. Several streets were flooded around the Tucson International Airport and a swift water rescue was conducted at Old Nogales and Old Vail Roads. The most significant damage was sustained by the Marshall Home for Men near Interstate 10 and Interstate 19 where a small wash overflowed into the business, resulting in significant water damage to the interior. The force of the water also broke through the front door.

Flash Flood in PIMA, ARIZONA
From 10-SEP-11 18:15:00 to 10-SEP-11 19:00:00 (MST-7)
Location: SABINO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rainfall with amounts between one and two inches resulted in flash flooding across a wide swath of the Tucson area. Several swift water rescues were conducted with two near the 3800 block of West Goret Road in the Tucson Mountains. Another swift water rescue was conducted in the 9400 block of Hartman Lane, where a motorcyclist had to be rescued with a rope and flotation device.

Funnel Cloud in PIMA, ARIZONA
From 10-SEP-11 14:45:00 to 10-SEP-11 14:51:00 (MST-7)
Location: VAIL JCT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A funnel cloud was observed near Vail. It extended about a quarter of the way from the cloud base to the ground.