A strong upper-level low impacted Southern California on March 28th and 29th. Widespread precipitation occurred with this system, with areas of heavy rain at lower elevations and snow in the mountains. Heavy rain in spots led to flooding, which then led to some water rescues, road closures, as well as a small mud and debris flow on the Bond Fire burn scar.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 28-MAR-22 08:00:00 to 29-MAR-22 14:00:00 (PST-8)
Location: (NRS)NAF IMPERIAL BE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy rain began on the morning of March 28th and continued through the afternoon on March 29th. Rainfall of 0.75 to 1.50 inches fell across much of coastal and valley locations in San Diego County, with far southern portions of San Diego County as well as the foothills and mountains receiving 1.50 to 2.00 inches.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 28-MAR-22 08:00:00 to 29-MAR-22 14:00:00 (PST-8)
Location: TEMECULA RNCH CAL AR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy rain began on the morning of March 28th and lasted through the afternoon on March 29th. Widespread rainfall totals of around 0.50 inch to nearly 1.00 inch were observed across Riverside County, with localized areas in the mountains seeing rainfall totals near 1.50 inches.

Heavy Rain in ORANGE, CALIFORNIA
From 28-MAR-22 19:00:00 to 28-MAR-22 19:00:00 (PST-8)
Location: LAGUNA HILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 0.50 inch between 7 and 8 PM. Additional 0.60 inch overnight. Additional 0.4 inch Monday afternoon. Total of 1.40 inches. Other sites near this location reported 1.40 to 2.00 inches total.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 28-MAR-22 22:42:00 to 28-MAR-22 22:42:00 (PST-8)
Location: RAMONA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of rainfall of 1.17 inch, 1mi SSE of Ramona.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 29-MAR-22 09:50:00 to 29-MAR-22 09:50:00 (PST-8)
Location: DEVORE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

SKYWARN weather spotter reported storm total rainfall of 1.65 inches.

Strong Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 28-MAR-22 08:53:00 to 28-MAR-22 08:53:00 (PST-8)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Branches down, light weight and medium weight items blowing all over property.

Flood in ORANGE, CALIFORNIA
From 28-MAR-22 11:53:00 to 28-MAR-22 11:53:00 (PST-8)
Location: (SNA)SANTA ANA CO AR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Onramp flooded on SR-73 at Bristol Street North.

Debris Flow in ORANGE, CALIFORNIA
From 28-MAR-22 13:00:00 to 28-MAR-22 13:00:00 (PST-8)
Location: SILVERADO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Orange County Public Works cleared mud and rocks one foot deep from Silverado Canyon Road near Olive Drive in the Bond Fire burn scar.

Debris Flow in SAN BERNARDINO, CALIFORNIA
From 28-MAR-22 19:14:00 to 28-MAR-22 19:14:00 (PST-8)
Location: MT BALDY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Several rock slides on Mt Baldy Road near Hill Avenue, but not enough to block the road and prevent vehicles from passing.

High Surf in ORANGE COUNTY COASTAL, CALIFORNIA
From 29-MAR-22 09:00:00 to 29-MAR-22 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Maximum surf of 8 feet reported by Huntington Beach lifeguards.

High Surf in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 29-MAR-22 09:00:00 to 29-MAR-22 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Surf of 6 to 8 feet reported at 10 AM and 1 PM around Mission Beach according to the Mission Beach lifeguards.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 29-MAR-22 07:41:00 to 29-MAR-22 07:41:00 (PST-8)
Location: ARCILLA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported storm total rainfall of 0.76 inch.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 28-MAR-22 16:00:00 to 28-MAR-22 16:00:00 (PST-8)
Location: YUCAIPA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported storm total rainfall of 0.71 inch.

Flood in SAN DIEGO, CALIFORNIA
From 28-MAR-22 22:27:00 to 28-MAR-22 22:27:00 (PST-8)
Location: VISTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Vista Village Drive and High 78 off-ramp completely flooded towards bottom, reported by CHP Caltrans. No rain gauges in Vista, but Palomar-Carlsbad airport had 0.95 inch total and downstream Deer Springs had 1.27 inches.

Flood in SAN DIEGO, CALIFORNIA
From 28-MAR-22 22:29:00 to 28-MAR-22 22:29:00 (PST-8)
Location: LYNWOOD HILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Offramp at I-805 and Bonita Road completely flooded and vehicles were stopped before the water. Sweetwater River drainage area. 0.75 inch in 1 hour and 1.3 inches in 3 hours observed. 0.71 inch observed at Brown Field from 9 to 10 PM.

Heavy Rain in ORANGE, CALIFORNIA
From 28-MAR-22 06:00:00 to 29-MAR-22 14:00:00 (PST-8)
Location: LA HABRA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy rain began on the morning of March 28th and continued through the afternoon on March 29th. Rainfall of 0.50 to 1.00 inches fell across much of coastal and inland valley locations in Orange County, with far southeastern portions of Orange County as well as the foothills and mountains receiving upwards of 1.50 to 2.00 inches.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 28-MAR-22 08:00:00 to 29-MAR-22 14:00:00 (PST-8)
Location: MONTE VISTA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy rain began on the morning of March 28th and lasted through the afternoon on March 29th. Widespread rainfall totals of around 0.50 inch to nearly 1.00 inch were observed across the lower elevations in San Bernardino County, with localized areas in the mountains seeing rainfall totals anywhere from 1.50 to 3.00 inches.