An extremely moist southeast flow across Arizona brought widespread showers, thunderstorms,  heavy rain, and flash flooding to northern Arizona.

Heavy Rain in YAVAPAI, ARIZONA
From 30-JUL-10 11:15:00 to 30-JUL-10 12:00:00 (MST-7)
Location: FORBING PARK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm produced heavy rain in Prescott.  A spotter reported 1.01 inches of rain in 45 minutes.  Another spotter reported 0.90 inches of rain in just 20 minutes.  Small streams overflowed their banks.

Heavy Rain in NAVAJO, ARIZONA
From 30-JUL-10 12:09:00 to 30-JUL-10 13:09:00 (MST-7)
Location: HEBER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported 1.65 inches of rain in one hour.

Heavy Rain in GILA, ARIZONA
From 30-JUL-10 12:00:00 to 30-JUL-10 14:20:00 (MST-7)
Location: (0E4)PAYSON ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Weather spotters in Payson reported between 2.20 and 2.30 inches of rain.  Heavy street flooding was reported with some structures threatened by over a foot of runoff.

Heavy Rain in COCONINO, ARIZONA
From 30-JUL-10 15:00:00 to 30-JUL-10 16:00:00 (MST-7)
Location: CHALENDER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One inch of rain fell at Green Base Lookout Tower in 20 minutes.  The storm total was 1.10 inches.

Flash Flood in YAVAPAI, ARIZONA
From 30-JUL-10 19:15:00 to 30-JUL-10 20:15:00 (MST-7)
Location: SYCAMORE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain produced flash flooding in Sycamore Canyon.  Four people became stranded near a swimming hole and had to be rescued.

Flash Flood in NAVAJO, ARIZONA
From 30-JUL-10 19:00:00 to 30-JUL-10 20:00:00 (MST-7)
Location: PETRIFIED FOREST NAT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Two normally dry washes  flooded.  One quarter of a mile of the roadway was covered in water.

Flash Flood in COCONINO, ARIZONA
From 30-JUL-10 14:29:00 to 30-JUL-10 18:00:00 (MST-7)
Location: (PGA)PAGE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy rain from thunderstorms caused flash flooding in Antelope Canyon. People were stranded on ledges in this slot canyon when a four and a half foot wall of water came rushing through the canyon.  Five members of a 12 member Swiss tourist group were injured. A woman and her 9 year old son sustained scrapes and busies as they were washed downstream. Three men were also injured.  A second wall of water came rushing through the canyon after the people were rescued.

Flood in COCONINO, ARIZONA
From 30-JUL-10 15:00:00 to 30-JUL-10 18:00:00 (MST-7)
Location: DONEY PARK
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy rain fell across large areas of west, central, and east Flagstaff.  Rainfall rates were close to 3 inches per hour.  One spotter reported 1.40 inches of rain in the first 30 minutes.  Roads around town became impassible.  Five cars were stalled in one intersection.  Several cars became stuck in an underpass with water up to the hoods.  One car started to float. It took two hours for pumps to drain the water in the underpass.