An active monsoon season continued to impact Southern California, with multiple days of thunderstorms reported across the mountains from August 22-26. The main hazards were heavy rain and minor debris flows, as well as gusty winds from thunderstorms.

Flash Flood in SAN DIEGO, CALIFORNIA
From 24-AUG-22 12:20:00 to 24-AUG-22 12:20:00 (PST-8)
Location: LIVE OAK SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy rain on I-8 near the Crestwood Road on-ramp. Multiple vehicles parked on the right hand side due to the torrential rain, hail, and poor visibility.

Flood in RIVERSIDE, CALIFORNIA
From 24-AUG-22 12:50:00 to 24-AUG-22 12:50:00 (PST-8)
Location: ANZA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Minor flooding and small hail shared in photos from the Cahuilla Reservation off of Highway 371.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 23-AUG-22 14:30:00 to 23-AUG-22 14:30:00 (PST-8)
Location: FOREST FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet HADS Station FFPC1 1.5 miles west of Forest Falls measured 0.53 inches of rain in 1 hour.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-AUG-22 13:15:00 to 24-AUG-22 13:15:00 (PST-8)
Location: PINE HILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Lake Cuyamaca spotter received 0.75 inches of rain in 45 minutes.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 24-AUG-22 13:38:00 to 24-AUG-22 13:38:00 (PST-8)
Location: ANZA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station KWYC1 Kenworthy along Highway 74 measured 1.04 inches of rain in 1 hour.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-AUG-22 13:55:00 to 24-AUG-22 13:55:00 (PST-8)
Location: JULIAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station VCNC1 2.8mi north of Julian at Volcan Mountain measured 1.01 inches of rain in 1 hour.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 24-AUG-22 11:02:00 to 24-AUG-22 11:02:00 (PST-8)
Location: PINE COVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station ALNC1 near Idyllwild-Pine Cove measured 0.87 inch of rain.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 24-AUG-22 12:35:00 to 24-AUG-22 12:35:00 (PST-8)
Location: FALLSVALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station YUCC1 Little San Gorgonio Peak at Yucaipa Ridge at 9000 feet measured 0.47 inches of rain in 15 minutes.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 24-AUG-22 12:54:00 to 24-AUG-22 12:54:00 (PST-8)
Location: ANZA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station NZAC1 Anza measured 0.76 inch of rain in 1 hour.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-AUG-22 14:15:00 to 24-AUG-22 14:15:00 (PST-8)
Location: PALOMAR MTN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station PAMC1 Palomar Mountain RAWS measured 0.88 inch of rain in 1 hour. Temperature dropped from 87 to 72F.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-AUG-22 15:46:00 to 24-AUG-22 15:46:00 (PST-8)
Location: PINE HILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station FW0019 Lake Cuyamaca measured 0.49 inch of rain in 45 minutes.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 24-AUG-22 12:00:00 to 24-AUG-22 12:00:00 (PST-8)
Location: SUGARLOAF
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station EW3043 Big Bear City measured 1 inch of rain in 90 minutes.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 25-AUG-22 14:13:00 to 25-AUG-22 14:13:00 (PST-8)
Location: LA QUINTA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Toro Peak HPWREN site measured 1.11 inches of rain in 1 hour.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 25-AUG-22 13:00:00 to 25-AUG-22 13:00:00 (PST-8)
Location: SUGARLOAF
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall of 0.61 inches was measured between 12:45 PM and 2 PM.

Debris Flow in SAN BERNARDINO, CALIFORNIA
From 23-AUG-22 15:04:00 to 23-AUG-22 15:04:00 (PST-8)
Location: FOREST FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported rocks in the middle of lanes along Highway 38 just north of the Forest Falls junction.

Thunderstorm Wind in SAN DIEGO, CALIFORNIA
From 24-AUG-22 11:08:00 to 24-AUG-22 11:08:00 (PST-8)
Location: PALOMAR MTN
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station at Palomar Mountain Lookout.

Strong Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 24-AUG-22 12:40:00 to 24-AUG-22 12:40:00 (PST-8)
Magnitude: 45.00 MG
Reported by: Mesonet

Mesonet station CWDSD Crestwood (SDGE) reported a thunderstorm wind gust of 52 mph.

Strong Wind in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 24-AUG-22 11:40:00 to 24-AUG-22 11:40:00 (PST-8)
Magnitude: 48.00 MG
Reported by: Mesonet

Mesonet station SE375 Keen Ridge (SCE375) reported a thunderstorm wind gust of 55 mph. Temperature fell from 80 degrees to 68 degrees.