Clouds and rain spawned by a storm system packing energy from a tropical depression moved east Thursday, leaving most of the Inland Empire cool and dry, but another front is expected to clip the region Saturday night and Sunday, producing showers and lowering temperatures.
According to the National Weather Service, a trough that’s north of the Sierras will begin slipping southward on Saturday, dragging in moisture and creating instability over the deserts and valleys of Riverside and San Bernardino counties.
“A cold and rather strong inside slider system from the Great Basin (will) dive into southeast California,” according to an NWS statement. “This will bring a band of showers to the deserts, mountains and possibly eastern valleys.”
The Riverside metropolitan area — along with Palm Springs and southwest Riverside County — are forecast to receive minimal rainfall.
However, the San Gorgonio Pass, including Idyllwild, could see higher amounts, according to meteorologists.
Most of the precipitation is expected to fall early Sunday morning.
Forecasters said Santa Ana winds will be associated with the cold front, resulting in an immediate return to arid conditions in the region after the front passes. Anticipated wind speeds were not given.
Temperatures are predicted to peak in the mid-70s in Riverside and surrounding communities Sunday, while highs in Palm Springs and most of the Coachella Valley will hover in the mid-80s.
The NWS said the snow level will drop to about 8,000 feet Sunday night, possibly leaving trace amounts in the San Bernardino Mountains.
Storm activity from Hurricane Rosa, which was downgraded to a tropical depression as it made landfall in northern Mexico and swept into Arizona, raised fears of flash flooding in areas impacted by the Holy Fire at the foot of the Cleveland National Forest.
The Riverside County Emergency Management Department on Tuesday afternoon issued precautionary evacuation warnings for some residents of El Cerrito, Glen Ivy and Temescal Valley, recommending people temporarily relocate to safer places until the rain bands dissipated.
The warnings were lifted just before dawn Thursday.
Riverside received three-10th of an inch of rain over the last three days, with most of the precipitation falling Wednesday, according to the NWS.
Lake Elsinore received just under a half inch of rain, while the storm dropped about one-tenth of an inch in Indio and nearly a quarter-inch in Cathedral City over the last three days, the Weather Service stated.
The Holy Fire scorched 23,000 acres between Aug. 6 and Sept. 13.