LOS ANGELES (CNS) – Yet another storm system was making its way into the Southland today, threatening to dampen the Christmas holiday and likely bringing snow to the mountains, while again raising fears of possible flooding or debris flows in some recent burn areas.
A voluntary evacuation warning will take effect at 8 a.m. Thursday in the Silverado, Williams and Modjeska canyons in Orange County’s Bond Fire burn area. Residents were being advised to leave the area or prepare to evacuate quickly, particularly those with disabilities or mobility issues.
Some streets in the area will be restricted to local traffic only beginning at 8 a.m.
Orange County CEO Frank Kim said officials anticipated activating the county’s emergency operations center.
“We’re expecting at least a half-inch of rain” but with the ground already saturated with rain it has officials concerned.
“Even a quarter-inch on saturated ground can lead to a mudslide,” Kim said.
The National Weather Service issued a flood watch that will be in effect from Thursday night until Friday morning for coastal and inland Orange County. Forecasters said some mountain areas could receive 3 to 6 inches of rain from the “atmospheric river,” with the heaviest downpours expected after midnight Thursday through Friday morning.
The rain will persist intermittently — perhaps heavy at times –through the holiday weekend, according to the National Weather Service.
“Unsettled weather will prevail across the area with periods of rain through Sunday morning, heaviest Thursday into early Friday,” according to the weather service.
“Snow levels will remain quite high today and Thursday but will drop significantly Friday night into Saturday. Temperatures will be significantly below normal across the region.”
Snow levels will initially be around 9,000 feet, but will fall below 8,000 by Friday afternoon, bringing some light snow to about 5,000 feet by Friday night into Saturday morning.