Another surge of monsoon moisture led to an outbreak of thunderstorms over the Mojave Desert and southern Great Basin. A low pressure system further enhanced the storms on the 22nd.

Flash Flood in CLARK, NEVADA
From 22-AUG-12 07:25:00 to 22-AUG-12 08:30:00 (PST-8)
Location: OVERTON MUNI ARPT
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 169 was closed near Whitmore Street due to flash flooding.

Flash Flood in CLARK, NEVADA
From 22-AUG-12 08:45:00 to 22-AUG-12 10:00:00 (PST-8)
Location: GOODSPGS
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several roads in Sandy Valley were flooded with water and debris.

Flash Flood in ESMERALDA, NEVADA
From 22-AUG-12 09:00:00 to 22-AUG-12 16:00:00 (PST-8)
Location: LIDA
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A four mile section of Highway 266 near Lida Summit was washed out.

Flash Flood in CLARK, NEVADA
From 22-AUG-12 09:45:00 to 22-AUG-12 15:00:00 (PST-8)
Location: LAS VEGAS N AIR TERM
Flood cause: Heavy Rain
Property damage: 5.00M
Crop damage: 0.00K
Reported by: Broadcast Media

Significant flash flooding affected much of the Las Vegas Valley. Numerous roads were closed, and several people were rescued from cars. A church was damaged by three feet of water when a retaining wall collapsed. Several people were rescued from washes. One man died when he fell into the Pittman Wash and was swept downstream.

Flash Flood in CLARK, NEVADA
From 22-AUG-12 10:32:00 to 22-AUG-12 11:30:00 (PST-8)
Location: SLOAN
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Up to a foot of water ran down a road in Sloan.

Flash Flood in CLARK, NEVADA
From 22-AUG-12 11:19:00 to 22-AUG-12 15:00:00 (PST-8)
Location: CRYSTAL
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Significant flash flooding affected much of Valley of Fire State Park. Mud and debris flowed over roads in at least ten places in the park. White Dome Road was undercut and washed out. In addition, Exit 75 off Interstate 15 was washed out.

Flash Flood in CLARK, NEVADA
From 22-AUG-12 11:43:00 to 22-AUG-12 12:30:00 (PST-8)
Location: CALLVILLE BAY
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Six to eight inches of water were running across Northshore Road near mile marker 7.

Flash Flood in CLARK, NEVADA
From 22-AUG-12 13:18:00 to 22-AUG-12 14:30:00 (PST-8)
Location: BOULDER CITY ARPT
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple streets in Boulder City were closed due to water and debris.

Flash Flood in CLARK, NEVADA
From 21-AUG-12 17:04:00 to 21-AUG-12 18:30:00 (PST-8)
Location: MOAPA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water, rocks, and small bushes flowed across Highway 93 south of Coyote Springs, rendering the road impassable.

Thunderstorm Wind in CLARK, NEVADA
From 21-AUG-12 18:00:00 to 21-AUG-12 18:10:00 (PST-8)
Location: LOGANDALE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew large rocks into a house and blew down a fence.

Flash Flood in LINCOLN, NEVADA
From 21-AUG-12 21:03:00 to 21-AUG-12 23:00:00 (PST-8)
Location: CRESTLINE
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water one and a half feet deep flowed across Highway 319 near the Utah state line.