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The latest winter storm on Sunday, Jan. 29, prompted the National Weather Service to alert motorists to snowy and potentially hazardous travel conditions in the mountains of San Diego, Riverside, San Bernardino, Los Angeles, Ventura and Santa Barbara counties.
Rainfall into Monday was not expected to be strong enough to bring any flood warnings. Forecasters said it would average 0.25-0.45 an inch in Orange County and the Inland Empire. In the LA County area, rain was expected to total .1 to .5 of an inch, though it could reach a full inch in the San Gabriel Mountains.
Rain moved into the area Sunday morning and by 3:30 p.m. had dropped amounts in Riverside County valleys ranging from .16 inch in Beaumont to .07 in Temecula. In San Bernardino County, .08 was measured at Cal State San Bernardino and .04 in Ontario. The NWS said .12 was measured on Santiago Peak in the Santa Ana Mountains. In the Santa Fe Dam area of LA County, .09 was measured.
A winter storm warning was issued for the San Bernardino Mountains including the Wrightwood, Crestline, Lake Arrowhead, Big Bear and Running Springs areas. The warning is effective through 7 a.m. Tuesday.
“Travel could be very difficult,” the NWS warned, noting snow levels were expected around 5,000 feet Sunday, 4,500 feet on Monday morning and down to 3,000 feet early Tuesday. Light snow accumulations were expected on the 15 Freeway in the Cajon Pass.
In the Idyllwild area of Riverside County, a storm warning was in place and heavy snow was expected with 9 to 14 inches above 6,000 feet. A similar warning was in place for San Diego County mountain communities including Julian and Pine Valley.
To the north, advisories were issued for LA, Ventura and Santa Barbara county mountains and the Antelope Valley.
“Light snow accumulation is possible on area roadways down to around 3,000 feet including portions of Interstate 5 from the Grapevine to north of Castaic, as well as the higher portions of Highway 14 near Agua Dulce and Acton,” the NWS said.
Cold storm developing. Rain will affect the region, with snow down to 2500 ft later tonight into Mon morning. I-5 over the Grapevine & Hwy 14 will likely be impacted. 1-2″ snow possible for Palmdale especially south side toward foothills. #LAWeather #SoCal #cawx pic.twitter.com/ReJvQaveSE
— NWS Los Angeles (@NWSLosAngeles) January 29, 2023
Forecasts for Monday:
Woodland Hills: High 53 degrees, low 38 degrees with showers likely.
Anaheim: High 58 degrees, low 42 degrees with rain likely.
San Bernardino: High 54 degrees, low 38 degrees with rain likely.
Hemet: High 53 degrees, low 35 degrees with rain likely.
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