July rounded out with another shot of monsoon moisture and thunderstorms as high pressure shifted back westward over the Four Corners on the 29th and 30th. The main drivers for storms were terrain and outflow boundary collisions. Scattered thunderstorms occurred mainly over the mountains and deserts with wide-ranging rainfall totals from a few tenths of an inch to locally over 2 inches. Flash flooding occurred in Idyllwild, Timoteo Canyon, Calimesa/Moreno Valley, along with water flowing in the Fish and Vallecito Creeks in Anza Borrego State Park. A few storms went severe, including quarter-sized hail and wind damage in Calimesa and wind damage from a microburst in Palm Desert.

Lightning in SAN DIEGO, CALIFORNIA
From 30-JUL-15 12:30:00 to 30-JUL-15 13:30:00 (PST-8)
Location: BOULDER OAKS
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a lightning strike that started a small fire near Interstate 8 and Kitchen Creek Road.

Flash Flood in SAN DIEGO, CALIFORNIA
From 30-JUL-15 14:30:00 to 30-JUL-15 15:30:00 (PST-8)
Location: GUATAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported 4 to 6 inches of water flowing across Old Highway 80 in Guatay.

Flood in SAN BERNARDINO, CALIFORNIA
From 30-JUL-15 13:30:00 to 30-JUL-15 14:30:00 (PST-8)
Location: PHELAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter in Phelan reported 4 inches of standing water at the intersection of Phelan Road and Johnson Road as well as ponding on other area roads. The spotter measured 0.23 inches of rain that fell in 20 minutes.

Thunderstorm Wind in SAN BERNARDINO, CALIFORNIA
From 30-JUL-15 16:00:00 to 30-JUL-15 17:00:00 (PST-8)
Location: YUCAIPA
Magnitude: 43.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported power lines down and trees blocking the roadway on San Timoteo Canyon Road near Redlands Blvd.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 30-JUL-15 17:00:00 to 30-JUL-15 18:30:00 (PST-8)
Location: PINON HILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported water and debris across the roadway at the intersection of Highway 138 and Evergreen Road. A spotter also reported 1/4 to 3/8 inch hail ongoing with heavy rainfall.

Thunderstorm Wind in RIVERSIDE, CALIFORNIA
From 30-JUL-15 15:30:00 to 30-JUL-15 16:30:00 (PST-8)
Location: CHERRY VLY
Magnitude: 43.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong winds from a thunderstorm downed power lines trapping individuals in their car at Oak Glen and Cherry Valley Road.

Flash Flood in RIVERSIDE, CALIFORNIA
From 30-JUL-15 16:00:00 to 30-JUL-15 18:00:00 (PST-8)
Location: ORDWAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One person was stuck in vehicle that was stuck in flood waters near the railroad tracks at San Timoteo Canyon Road and Live Oak Canyon Road. The car was stuck in mud associated with the flash flooding.

Flash Flood in RIVERSIDE, CALIFORNIA
From 30-JUL-15 15:30:00 to 30-JUL-15 16:30:00 (PST-8)
Location: YUCAIPA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported torrential rains, marble sized hail, 2 of standing water in back yard, and 4-6 of water flowing in the road. Another spotter reported 1.00-1.25 of rain in 30 minutes and street flooding in Calimesa.

Flash Flood in RIVERSIDE, CALIFORNIA
From 30-JUL-15 12:30:00 to 30-JUL-15 15:30:00 (PST-8)
Location: VALLE VISTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported boulders and a large amount of sand in roadway along Highway 74 from heavy rain. A nearby spotter reported 6 inches of water flowing across the road at the Highway 74 and Marshall Avenue cross-section in Valle Vista.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 29-JUL-15 12:00:00 to 29-JUL-15 13:00:00 (PST-8)
Location: BIG BEAR CITY
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 18 flooded, with portions of roadway washing away. Several vehicles were stuck in mud.

Lightning in SAN BERNARDINO, CALIFORNIA
From 29-JUL-15 11:00:00 to 29-JUL-15 12:30:00 (PST-8)
Location: LUCERNE VLY
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter in Lucerne Valley reported a lightning strike onto power lines causing a power outage across a section of the Lucerne Valley area to the southeast of town. A transformer was burned out and tripped a number of circuit breakers on the nearby power grid causing the outage for over an hour in some locations.

Thunderstorm Wind in RIVERSIDE, CALIFORNIA
From 30-JUL-15 18:30:00 to 30-JUL-15 20:30:00 (PST-8)
Location: INDIAN WELLS
Magnitude: 61.00 EG
Property damage: 45.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Photos shared by a local media outlet indicate a downburst/microburst was likely the cause of extensive wind damage in the northeast side of Indian Wells in the Palm Desert Country Club area. Based on damage, winds were estimated at 60 to 70 mph. Multiple large trees and power lines down, along with roofing material and other debris on the ground. Trees fell on an apartment on Elkhorn Trail and damaged the roof. A total of 5288 customers lost power due to downed lines. Fred Waring Drive between El Dorado and Warner Trail in Palm Desert was also closed due to flooding and debris.