A Santa Ana windstorm is in store for the Inland Empire on Thanksgiving, with the San Gorgonio Pass and other locations likely to receive gusts between 65 and 75 mph and a wind advisory effect until Friday night, the National Weather Service said.
“An expansive surface high pressure system will stretch from Nevada to Colorado … a pattern that supports a stronger east-west pressure gradient that would funnel the strongest winds through the passes of Riverside and San Diego counties,” the NWS said in a statement Tuesday.
“This is where the highest gusts appear most likely. The winds will remain fairly strong Thursday afternoon, then subside a bit in the evening.”
A wind advisory is in effect from 4 a.m. Thursday to 10 a.m. Friday.
“Gusty winds could blow around unsecured objects,” the weather service said. “The combination of strong winds, low relative humidity and warm weather will result in several hours of critical fire weather conditions.”
Forecasters predicted sustained winds of 20 to 35 mph, with gusts of 55 mph possible in mountain passes and canyons. The San Gorgonio Pass and the Interstate 10 corridor were specifically referenced with gusts from 65 to 75 mph in wind-prone areas expected.
High temperatures in the Riverside metropolitan area on Thanksgiving and the day after will be in the mid 70s, with lows in the upper 40s, according to the NWS.
Similar temperature patterns are forecast for the Coachella Valley, though overnight lows will hover in the low 50s, while the daytime mercury will also top out in the mid 70s in the Temecula Valley, with lows in the mid 40s.
Meteorologists said that the next chance of rain will be Monday, when a trough of low pressure sweeps in from the Pacific Northwest, though precipitation amounts are not expected to be significant in the region.