Strong high pressure aloft was centered over the four corners area of the southwest, which resulted in monsoonal flow into the region from the 4th through the 8th. Precipitable water values around two inches supported heavy rainfall from thunderstorms in the mountains and deserts. The most intense thunderstorms occurred on the 6th, when a few severe storms roamed the Inland Empire with strong winds and hail. Flash flooding was observed near Wrightwood and Phelan, while the Whitewater River north of Whitewater experienced a rapid rise in flow.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 05-JUL-11 12:00:00 to 05-JUL-11 14:30:00 (PST-8)
Location: APPLE VLY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Street flooding in numerous locations within Apple Valley due to heavy rain. Pea sized hail also reported.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 05-JUL-11 12:00:00 to 05-JUL-11 14:00:00 (PST-8)
Location: BIG BEAR CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter SBD286 reported a very heavy downpour in the area of North Shore Drive and Greenway Drive in Big Bear City from approximately 1340-1355 PST. During this time, his rain gage showed just over a half inch of rain.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 06-JUL-11 12:00:00 to 06-JUL-11 13:00:00 (PST-8)
Location: GUATAY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

San Diego County Flood Control reported 0.80 inches of rain over 15 minutes and an additional 0.10 inches over the next 5 minutes, resulting in 0.90 inches of rain over 20 minutes.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 06-JUL-11 11:30:00 to 06-JUL-11 14:00:00 (PST-8)
Location: PINON HILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter SBD320 reported Phelan Road West closed at Beekley Road due to flooding from heavy rain of 0.26 inches of rain in one hour in Phelan. Highway 138 is also closed betweek Beekley Road and Green Road due to mud, water and debris on the roadway.
Another spotter reported 1.5 feet of water on the road at the intersection of Highway 18 and Sheep Creek Road, with cars stranded on the side of the road.

Flood in RIVERSIDE, CALIFORNIA
From 06-JUL-11 13:00:00 to 06-JUL-11 16:00:00 (PST-8)
Location: NUEVO
Flood cause: Heavy Rain
Property damage: 9.00K
Crop damage: 0.00K
Reported by: Newspaper

Three houses in Nuevo had minor flooding in the 500 block of West 10th, 28600 block of Central and the 28700 block of Reservoir. No one was forced out of their homes.

Thunderstorm Wind in SAN BERNARDINO, CALIFORNIA
From 06-JUL-11 11:30:00 to 06-JUL-11 14:00:00 (PST-8)
Location: PINON HILLS
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Trained Spotter

Two trees in a backyard on Beekley in the Pinon Hills area, foothills below Wrightwood, lost limbs. The limbs that came down were the size of small trees. The wind also picked up their pool cover and threw it in to the pool.

Flood in RIVERSIDE, CALIFORNIA
From 06-JUL-11 18:00:00 to 06-JUL-11 19:30:00 (PST-8)
Location: WHITE WATER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Whitewater River gage at Windy Point rose 1000 cfs in 30 minutes from 1830 TO 1900 PST. The source of the heavy rainfall was in the San Gorgonio Wilderness.

Thunderstorm Wind in RIVERSIDE, CALIFORNIA
From 06-JUL-11 13:30:00 to 06-JUL-11 14:30:00 (PST-8)
Location: ROMOLAND
Magnitude: 50.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Newspaper

Power lines down due to wind in the vicinity of Perris and Romoland. Locations include Ethanac Road at Evans Road west of Romoland, South D and East 7th Streets in Perris, and the 27900 block of Washington Street. All lines reported down around 1400 PST on the 6th.