Considerable moisture from Hurricane Dolores to the south, along with monsoon moisture from the southeast resulted in widespread showers and thunderstorms over most of the HSA for the 17th-19th. Rainfall ranged from one-half of an inch up to around 4 inches, including a record 1.71 inches at Lindbergh Field on the 18th (July 18 single-day and July monthly total). The San Diego River at Fashion Valley had 2 crests above monitor stage, 7.7 feet on the 18th and 8.8 feet on the 19th. The heavy rain resulted in a debris flow in the burn scar of Silverado Canyon, as well as flash flooding in Moreno Valley, Perris, and La Mesa on the 19th and a wet microburst in Tierrasanta on the 18th. The rain also caused the first Los Angeles Angels baseball game rain-out since 1995, and a rare 2-hour rain delay at the San Diego Padres baseball game. Over 2000 lightning strikes reported on July 18, some starting small brush fires. Microburst wind damage occurred in Tierrasanta, along with additional damage from a haboob in the Anza Borrego SP and wind damage from a thunderstorm in Palm Desert.

Thunderstorm Wind in SAN DIEGO, CALIFORNIA
From 17-JUL-15 16:46:00 to 17-JUL-15 16:56:00 (PST-8)
Location: BORREGO SPGS ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An trained spotter estimated a 60 mph wind gust just southeast of Borrego Springs.

Flash Flood in SAN DIEGO, CALIFORNIA
From 18-JUL-15 12:20:00 to 18-JUL-15 13:00:00 (PST-8)
Location: HILLCREST
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The CHP reported a vehicle almost submerged in water on one of the on-ramps at the intersection of Highway 163 and Interstate 8 near mission valley.

Debris Flow in SAN BERNARDINO, CALIFORNIA
From 18-JUL-15 14:00:00 to 18-JUL-15 15:00:00 (PST-8)
Location: FOREST FALLS
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The CHP reported a stalled tour bus being struck by a rock slide. No injuries occurred but the bus was disabled.

Thunderstorm Wind in SAN DIEGO, CALIFORNIA
From 18-JUL-15 12:15:00 to 18-JUL-15 12:30:00 (PST-8)
Location: (MYF)MNTGMRY FLD SAN
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Six large pine trees downed by strong winds near Porto Ct. The largest tree was close to 3 feet in diameter.

Lightning in RIVERSIDE, CALIFORNIA
From 18-JUL-15 08:30:00 to 18-JUL-15 08:50:00 (PST-8)
Location: INDIO
Property damage: 0.25K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a lightning fire near the intersection of Dillon Rd. and Fargo Canyon Rd. northeast of Indio.

Lightning in RIVERSIDE, CALIFORNIA
From 18-JUL-15 06:45:00 to 18-JUL-15 07:00:00 (PST-8)
Location: VAL VERDE
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a lightning started brush fire at the intersection of Interstate 215 and Harley Knox Blvd.

Lightning in RIVERSIDE, CALIFORNIA
From 18-JUL-15 07:25:00 to 18-JUL-15 07:40:00 (PST-8)
Location: BANNING
Property damage: 0.25K
Crop damage: 0.00K
Reported by: Law Enforcement

Small brush fire from a lightning strike reported by CHP.

Lightning in RIVERSIDE, CALIFORNIA
From 18-JUL-15 08:05:00 to 18-JUL-15 08:20:00 (PST-8)
Location: RANCHO CALIFORNIA
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a small brush fire started by a lightning strike.

Lightning in SAN DIEGO, CALIFORNIA
From 18-JUL-15 05:30:00 to 18-JUL-15 05:45:00 (PST-8)
Location: LA JOLLA
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported transformer struck by lightning.

Lightning in SAN DIEGO, CALIFORNIA
From 18-JUL-15 06:00:00 to 18-JUL-15 06:15:00 (PST-8)
Location: DEL MAR
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP and local media reported a small brush fire started by lightning.

Lightning in SAN DIEGO, CALIFORNIA
From 18-JUL-15 09:30:00 to 18-JUL-15 10:00:00 (PST-8)
Location: POWAY
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported traffic signals lights knocked out by a lightning strike.

Flash Flood in SAN DIEGO, CALIFORNIA
From 19-JUL-15 14:00:00 to 19-JUL-15 17:30:00 (PST-8)
Location: RAMONA ARPT
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Training thunderstorms produce heavy rainfall over Ramona with 0.58 in falling between 1401 and 1419 PST.  The CHP reported significant flooding and road closures along 11th St. in Ramona, that the road was completely washed out at the intersection of State Route 78 and Ramona View Dr., and water washing fences and debris over Vista Ramona Rd. A trained spotter reported water 3 ft deep at Ramona Rd. and Lawrence St. with some residents unable to evacuate their homes.

Lightning in SAN BERNARDINO, CALIFORNIA
From 18-JUL-15 08:15:00 to 18-JUL-15 08:45:00 (PST-8)
Location: ARROWBEAR LAKE
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a small lightning ignited fire near Keller Peak.

Funnel Cloud in RIVERSIDE, CALIFORNIA
From 19-JUL-15 14:30:00 to 19-JUL-15 14:35:00 (PST-8)
Location: BLY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A funnel cloud formed and dissipated in less than one minute.

Thunderstorm Wind in RIVERSIDE, CALIFORNIA
From 17-JUL-15 18:15:00 to 17-JUL-15 18:30:00 (PST-8)
Location: (TRM)THERMAL ARPT
Magnitude: 43.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds knocked over and tree, which blocked the east bound lanes at 66th Ave. and Harrison St. in the town of Valerie.

Lightning in RIVERSIDE, CALIFORNIA
From 18-JUL-15 08:40:00 to 18-JUL-15 08:55:00 (PST-8)
Location: (TRM)THERMAL ARPT
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported multiple palm trees on fire due to a lightning strike near the intersection of Jackson St. and 61st Ave.

Funnel Cloud in RIVERSIDE, CALIFORNIA
From 19-JUL-15 13:35:00 to 19-JUL-15 13:50:00 (PST-8)
Location: ELSINORE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a funnel cloud over Lake Elsinore.

Thunderstorm Wind in RIVERSIDE, CALIFORNIA
From 19-JUL-15 13:40:00 to 19-JUL-15 13:56:00 (PST-8)
Location: PERRIS
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a downed palm tree blocking the roadway.

Thunderstorm Wind in RIVERSIDE, CALIFORNIA
From 19-JUL-15 13:01:00 to 19-JUL-15 13:16:00 (PST-8)
Location: NUEVO
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a bent electrical pole with wires hanging across the roadway in Nuevo.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 19-JUL-15 15:30:00 to 19-JUL-15 16:20:00 (PST-8)
Location: ADELANTO HLNDALE ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported 1 to 2 feet of water across US-395 near Shadow Mountain Road.

Flash Flood in RIVERSIDE, CALIFORNIA
From 19-JUL-15 13:30:00 to 19-JUL-15 15:30:00 (PST-8)
Location: ORDWAY
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported significant urban flooding in the Moreno Valley area due to a heavy line of thunderstorms. The most significant flooding was reported at the intersection of Interstate 215 and Van Buren Blvd, where 8 cars were stuck in high waters. In Reche Canyon residents were unable to leave their homes due to flooded roadways. Portions of State Highway 60 were also impassable.

Debris Flow in SAN BERNARDINO, CALIFORNIA
From 19-JUL-15 14:45:00 to 19-JUL-15 15:45:00 (PST-8)
Location: CAJON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported mud flowing across all lanes with lanes blocked on Interstate 15 near the Cajon Junction.

Debris Flow in SAN BERNARDINO, CALIFORNIA
From 19-JUL-15 18:45:00 to 19-JUL-15 19:45:00 (PST-8)
Location: MT BALDY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported that Mt. Baldy Rd. was closed at Falls Rd. due to rock/mud slides.

Flash Flood in RIVERSIDE, CALIFORNIA
From 17-JUL-15 20:00:00 to 17-JUL-15 20:30:00 (PST-8)
Location: (TRM)THERMAL ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The CHP reported a hard closure of roadways near the intersection of Jackson St. and 66th Ave. due to roadway flooding.

Debris Flow in RIVERSIDE, CALIFORNIA
From 19-JUL-15 14:10:00 to 19-JUL-15 14:30:00 (PST-8)
Location: WEISEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a roadway covered in mud at Cajalco Rd. and La Sierra Ave.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 19-JUL-15 18:15:00 to 19-JUL-15 21:01:00 (PST-8)
Location: SCOTLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Two swift water rescues were conducted along the Lytle Creek Wash.

Flash Flood in RIVERSIDE, CALIFORNIA
From 19-JUL-15 14:15:00 to 19-JUL-15 15:15:00 (PST-8)
Location: RIVERSIDE JCT
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported significant flooding along State Route 91. Vehicles were reported to be stuck in flood waters at the intersections of State Route 91 and Van Buren Blvd., and State Route 91 and Adams St. Mud covered all lanes at the the Central Ave. intersection.

Flash Flood in RIVERSIDE, CALIFORNIA
From 19-JUL-15 15:15:00 to 19-JUL-15 15:45:00 (PST-8)
Location: PRADO DAM
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a vehicle stuck in flood waters on the interchange between State Routes 71 and 91.

Debris Flow in SAN DIEGO, CALIFORNIA
From 19-JUL-15 13:15:00 to 19-JUL-15 14:15:00 (PST-8)
Location: WHISPERING PINES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The CHP reported a mud and rock slide at the intersection of State Route 78 near Wynola Rd. and a trained spotter reported a debris flow on Banner Grade at mile marker 61.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 19-JUL-15 14:40:00 to 19-JUL-15 16:20:00 (PST-8)
Location: WRIGHTWOOD
Flood cause: Heavy Rain
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported the roadway getting washed away at Lone Pine Canyon Rd. near East Canyon Dr. around 0345 PST. A spotter also reported significant flow through the normally dry Sheep Creek Wash, with lots of tree trunks going by.

Flash Flood in SAN DIEGO, CALIFORNIA
From 19-JUL-15 13:00:00 to 19-JUL-15 14:00:00 (PST-8)
Location: PALOMAR MTN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported Chihuahua Valley Rd. closed due to flooding.

Debris Flow in SAN DIEGO, CALIFORNIA
From 19-JUL-15 13:45:00 to 19-JUL-15 14:30:00 (PST-8)
Location: WITCH CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a mud and rock slide blocking both lanes of Old Julian Highway.

Flash Flood in SAN DIEGO, CALIFORNIA
From 19-JUL-15 13:10:00 to 19-JUL-15 13:40:00 (PST-8)
Location: SORRENTO
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported vehicles stranded in water at the intersection of Interstate 5 and Genesee on-ramp.

Flash Flood in SAN DIEGO, CALIFORNIA
From 19-JUL-15 13:15:00 to 19-JUL-15 14:15:00 (PST-8)
Location: VISTA LA MESA
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The CHP reported multiple vehicles stalled in flooded waters on the off-ramp from Fletcher Parkway to Interstate 8. Multiple vehicles were also submerged in flood waters along Alvarado Road.

Dust Storm in San Diego County Deserts, CALIFORNIA
From 17-JUL-15 15:45:00 to 17-JUL-15 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large area of blowing dust from a thunderstorm downburst was reported over the Deserts of San Diego County.

Debris Flow in ORANGE, CALIFORNIA
From 19-JUL-15 14:30:00 to 19-JUL-15 17:00:00 (PST-8)
Location: SILVERADO
Flood cause: Heavy Rain / Burn Area
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Orange County Fire reported that a portion of Silverado Canyon Rd. was temporarily closed, with up to 3 ft of mud across the roadway.