The National Weather Service is calling for a moderate-to-strong winter storm in California. It’s forecasted to impact the area Monday – Tuesday. The heaviest snowfall is expected to occur Monday evening – Tuesday morning.
- 1+ FEET Of Snow Monday – Tuesday
“A moderately strong weather system is forecast to move through northern California Christmas Eve day through Christmas morning with showers continuing through Christmas day. Several inches to over a foot of snow is expected during this time over the major Serra passes. As a result, major travel impacts are likely.”
– NOAA Sacramento, CA
Snow levels are forecasted to hover between 5,500ft – 6,000ft throughout the storm.
The 6-10 day outlook calls for above average precipitation and below average temperatures in California.
Additional Storm Info:
California: 1+ FEET Of Snow Monday – Tuesday
Long Term Forecast Discussion:
Area Forecast Discussion National Weather Service Reno NV 333 AM PST Thu Dec 20 2018 .SYNOPSIS... A fast moving weather system will bring increased winds later today and tonight, with light rain and higher elevation snow for northeast California and parts of the Tahoe basin. A few showers may linger into Friday mainly north of Interstate 80. The weekend will begin dry, then a more active weather pattern returns for Sunday through early next week, with Christmas Day looking cooler. && .LONG TERM...Sunday through Wednesday... The primary changes in the extended part of the forecast were made to delay the onset of precipitation a bit for Sunday and lower QPF just a little Sunday night. Otherwise...the model solutions have changed only a little and there was no reason to make big changes to the inherited forecast. The ECMWF is still a little faster than the GFS with the first wave of overrunning precipitation Sunday. They have both been consistent with themselves...but the GEFS ensemble members favor the GFS a bit more over the ECMWF. In deference to the ECMWF...we will leave some mention of precipitation Sunday...but the best coverage is likely to be Sunday night. This should be the weaker part of the overall system with limited liquid amounts and snow. The stronger part makes its way into the region Monday. There are still differences in the details between the operational models...so actual amounts of liquid precipitation and snowfall totals remain up in the air. The models are in decent agreement on the overall pattern through early Tuesday...then begin to diverge. Confidence in a moderate to strong winter storm is increasing...but confidence in the timing of the heaviest precipitation and the amounts are only medium at best. Precipitation should break out late Monday morning as the upper low approaches. The GFS is still more of a progressive open wave while the ECMWF develops a deeper...slower...nearly closed upper low that passes through southern Oregon. With either solution...the heaviest precipitation should fall some time between Monday evening and early Tuesday morning. Snow levels start above 5500-7000 feet (varying from north to south) then drop to near the lower valley floors by Tuesday morning as a cold front moves through. The timing for the cold air arriving in the valleys may be too late for substantial snow accumulation below 5500 feet. The models diverge a bit more from late Tuesday into Wednesday. The ECMWF holds the main trough closer to the area with more coverage of showers in the colder air. The GFS is more progressive and decreases the coverage of showers by late Tuesday. We will hold on to a mention of showers both days. High temperatures for both Tuesday and Wednesday should be below normal.