A weak atmospheric river brings heavy rain to Orange, northern Riverside and San Bernardino Counties. San Bernardino County saw the heaviest rainfall, with reports of 4 to 10 inches. Multiple reports of flooding were received with several swiftwater rescues. Breezy winds occurred as well from the evening of January 9 through January 10.

Flood in RIVERSIDE, CALIFORNIA
From 10-JAN-23 11:12:00 to 10-JAN-23 11:12:00 (PST-8)
Location: DESERT HOT SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

The City of Palm Springs reported the closure of North Indian Canyon Drive at the wash due to flooding. The Palm Springs Fire Department conducted a swift water rescue, with at least one person rescued from the vehicle.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 09-JAN-23 18:00:00 to 10-JAN-23 15:00:00 (PST-8)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong onshore winds impacted the San Bernardino County Mountains from the evening on January 9 through the afternoon on January 10. Widespread wind gusts over 50 mph were reported, with gusts as high as 77 mph recorded in several locations. The strongest winds occurred from late on January 9 through the morning on January 10. The following are the highest wind gust reports in the San Bernardino County Mountains:
Mesonet station SE338 Cajon Lookout reported a peak wind gust of 77 mph.
Mesonet station 056SE Lytle Creek South reported a peak wind gust of 77 mph.
Mesonet station 424SE Silverwood Lake reported a peak wind gust of 76 mph.
Burns Canyon reported a peak wind gust of 71 mph.
Mesonet station 053SE Cajon Canyon reported a peak wind gust of 68 mph.
Mesonet station 590SCE reported a peak wind gust of 68 mph.
Mesonet station SCE257 Boneyard Canyon reported a peak wind gust of 68 mph.
Mesonet station SCE664 Valley of the Falls reported a peak wind gust of 68 mph.
The Department of Highways reported a downed powerline in the lane of Camp Rock Road at Cheshire Road.

High Wind in SAN GORGONIO PASS NEAR BANNING, CALIFORNIA
From 10-JAN-23 12:00:00 to 10-JAN-23 20:00:00 (PST-8)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong onshore winds impacted the San Gorgonio Pass through the afternoon and evening on January 10. Widespread wind gusts over 50 mph were reported, with gusts as high as 70 mph recorded at Whitewater. The following are the highest wind gust reports at the San Gorgonio Pass near Banning:
Mesonet station 015SCE Whitewater reported a peak wind gust of 70 mph.
Whitewater RAWS reported a peak wind gust of 67 mph.
Mesonet station SCE1010 Cabazon reported a peak wind gust of 62 mph.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 10-JAN-23 11:00:00 to 10-JAN-23 16:00:00 (PST-8)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong onshore winds impacted the San Diego County Mountains through the afternoon and evening on January 10. Widespread wind gusts over 50 mph were reported, with gusts as high as 71 mph recorded at Boucher Hill. The following are the highest wind gust reports in the San Diego County Mountains:
HPWREN site Boucher Hill reported a peak wind gust of 71 mph.
Cuyamaca Peak reported a peak wind gust of 66 mph.
SDGE site Lucky Five Ranch reported a peak wind gust of 61 mph.
Oak Grover reported a peak wind gust of 60 mph.

Flood in ORANGE, CALIFORNIA
From 10-JAN-23 13:00:00 to 10-JAN-23 13:00:00 (PST-8)
Location: MISSION VIEJO
Flood cause: Heavy Rain / Burn Area
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Orange County Public Works reported minor flooding on roadways at Silverado Canyon, with rapid water movement in creeks. Two to three inches of rain were observed in the upper canyons.

Flood in ORANGE, CALIFORNIA
From 10-JAN-23 11:41:00 to 10-JAN-23 11:41:00 (PST-8)
Location: YORBA LINDA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Highways reported flooding in 4 out of 5 lanes.

Flood in RIVERSIDE, CALIFORNIA
From 10-JAN-23 03:40:00 to 10-JAN-23 03:40:00 (PST-8)
Location: CORONA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of six inches of flowing water in the HOV lane on Highway 91.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 06:00:00 to 10-JAN-23 06:00:00 (PST-8)
Location: WRIGHTWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Highways reported a road closure along Silver Rock Road to Colorado Road due to flooding.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 07:22:00 to 10-JAN-23 07:22:00 (PST-8)
Location: SUGARLOAF
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Arrowbear Bridge submerged due to flood waters.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 08:30:00 to 10-JAN-23 08:30:00 (PST-8)
Location: ARROWBEAR LAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Arrowbear Drive at Music Camp Drive closed due to flooding. The area received 3.5 inches of rainfall.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 11:30:00 to 10-JAN-23 11:30:00 (PST-8)
Location: HESPERIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Highways reported a road closure of Glendale Ave to Deep Creek Road due to flow in the Mojave River.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 12:21:00 to 10-JAN-23 12:21:00 (PST-8)
Location: APPLE VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of standing water in the backyard of a residence, and water several inches deep covering roadways.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 13:36:00 to 10-JAN-23 13:36:00 (PST-8)
Location: HESPERIA ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Highways reported water flowing across Highway 173, making the road impassable. A vehicle was stuck in the floodwaters near the west fork of the Mojave River.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 13:30:00 to 10-JAN-23 13:30:00 (PST-8)
Location: LAKE ARROWHEAD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Highways reported water flowing over Highway 173 at Arrowhead Lake Road, with a vehicle stuck in the floodwaters. The area had received 4.99 inch of rain in the previous 24 hours, with rainfall totals of 5.83 inches for the event.

Flood in SAN BERNARDINO, CALIFORNIA
From 10-JAN-23 00:00:00 to 10-JAN-23 13:30:00 (PST-8)
Location: DEVORE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy rainfall occurred across the San Bernardino County Mountains (west of the Cajon Pass) from January 9-10. Mesonet stations reported 4.6 inches (DVOC1 Devore) to 6.59 inches (MFLC1 Lytle Creek) in the previous 24 hours, with rain amounts as high as 9.50 inches at the top of Lytle Creek Canyon. Several flood reports were received:
The Department of Highways reported a road closure at Glen Helen Parkway due to flooding and debris. Broadcast media report of fast flowing water over Lytle Creek Road, flowing over the culvert.