Meteorologists expect cold temperatures and wind gusts as strong as 75 mph in portions of Southern California on New Year’s Eve, Monday, Dec. 31.
The strongest gusts should be isolated to the foothills and mountains of Los Angeles, Orange, Riverside, San Bernardino, San Diego and Ventura counties, forecasters said Sunday.
Valleys and coasts in Los Angeles and Ventura counties on Monday can expect average wind speeds to range from 15 to 40 mph, according to the National Weather Service.
Winds along the coast in Orange County are predicted Monday to increase from 5-10 mph in the morning to 15-30 mph by evening, depending on the location.
In the Riverside area, Monday morning winds of 5-10 mph could increase to 10-20 mph at night, with gusts as high as 30 mph.
Temperatures should peak in the high 50s in most of Southern California, then fall to the mid 30s and 40s by nightfall.
Here are the maximum gusts expected in the Santa Ana wind event Monday night through Tuesday night. Isolated mountain/foothill locations could have gusts to 75 MPH! #cawx#SantaAnaWinds pic.twitter.com/gUn6IPBC5R
— NWS San Diego (@NWSSanDiego) December 31, 2018
Los Angeles and Ventura counties should remain dry, but there will be a chance for light precipitation in other parts of Southern California before 10 a.m., according to NWS predictions.
Rain and snow will be more likely to fall in and near San Diego County. There, temperatures are expected to sink below freezing in the mountains and the snow line may drop to altitudes as low as 4,000 feet by sunset. Forecasters have advised motorists driving through these areas to be prepared for icy roads.
Elsewhere, moderate to strong Santa Ana winds should blow away most cloud cover by nightfall, and conditions should remain clear, cool and breezy going into Tuesday morning.
— NWS Los Angeles (@NWSLosAngeles) December 31, 2018
The U.S. Coast Guard on Sunday advised mariners to prepare for the high winds and heavy sea conditions, which can bring seas up to 9 feet in the Los Angeles area.
Also, Southern California Edison said Sunday it’s notifying customers of possible preemptive wind-related power shutoffs in high-risk areas.
Due to the projected strong Santa Ana winds with some potential for fire activity, we are notifying customers of possible power shutoffs in portions of these communities for Monday evening through Tuesday: https://t.co/PMACeXNVWQ No power has been shut off at this time.
— SCE (@SCE) December 31, 2018
SCE said some 75,000 customers were being notified in some unincorporated areas of Los Angeles, Orange, Riverside and San Bernardino counties as well as in the cities of Corona, Covina, Culver City, Fontana, Glendora, Industry, Irvine, Norco, Orange, Rancho Cucamonga, Rialto, San Dimas, San Fernando, Santa Clarita, Upland, Villa Park, Walnut and West Covina.
Looking to New Year’s Day’s forecast winds, a Fire Weather Watch was issued for the Los Angeles County mountains from 10 a.m. Tuesday to 8 a.m. Wednesday.
Fire Weather Watch issued for LA county mountains including Santa Monicas valid 10 am Tue to 8 am Wed. #SantaAnaWinds gusting 50-65 mph combined with low humidities will bring the potential for critical fire weather conditions. Rapid fire growth possible. #LAWeather #cawx
— NWS Los Angeles (@NWSLosAngeles) December 30, 2018
Source: Orange County Register