Winter's 1st 'Significant Storm' To Dump Rain, Snow Near Temecula

TEMECULA, CA — A powerful storm expected to roll in Monday evening is expected to dump up 18 inches of snow in some parts of the Riverside and San Bernardino county mountains, the National Weather Service said. Meanwhile, in the valleys, Riverside County residents can expect a tough morning commute on Tuesday with heavy rain and isolated thunderstorms.

There's a 100 percent chance of rain in the Temecula Valley on Tuesday and temperatures could dip into the 40s, according to weather forecasters.

"Light rain and showers are likely today into this evening ahead of a Pacific storm that will bring more widespread and heavier precipitation and strong gusty winds late tonight into Tuesday evening," the NWS said in its forecast discussion on Monday.

The storm will bring periods of snow and strong winds beginning late Monday evening and continue into Tuesday evening. Heavy, wet snow is expected in Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood and Idyllwild-Pine Cove.

Areas above 5,000 feet are expected to see 4 to 8 inches of snow accumulation. Some areas above 8,000 feet can expect 18 inches, according to the NWS.

Winds will be strongest from mountain ridge tops and onto the desert slopes of mountains, with speeds from 25 to 35 mph and gusts of up to 65 mph.

In areas hit by rain, residents can expect a large dose on Tuesday morning.

"The most widespread and heaviest precipitation is expected with the passage of the cold front early Tuesday morning, and periods of locally intense rainfall will be possible," the NWS said.

Here is your detailed work week forecast for Temecula, via the National Weather Service:

Monday
A 30 percent chance of showers, mainly after 4pm. Cloudy, with a high near 67. Calm wind becoming southwest around 5 mph in the afternoon.

Monday Night
Showers, mainly after 10pm. The rain could be heavy at times. Low around 54. Southeast wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%.

Tuesday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 58. South wind 15 to 20 mph becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

Tuesday Night
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers. Mostly cloudy, with a low around 46. South wind 5 to 10 mph. Chance of precipitation is 60%.

Wednesday
A 20 percent chance of showers before 10am. Mostly sunny, with a high near 62. South wind 5 to 10 mph.

Wednesday Night
Mostly clear, with a low around 46.

Thursday
Sunny, with a high near 75.

Thursday Night
Mostly clear, with a low around 49.

Friday
Sunny, with a high near 78.

Friday Night
Mostly clear, with a low around 51.

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Patch file photo by Renee Schiavone / City News Service contributed to this report