Dry and cool today, next storm system on track for Wednesday night arrival

November 7, 2017 – Dry weather with minor warming today. Wet weather returns Wednesday thru Friday and again next Sunday and Monday.

Discussion

High clouds associated with warm-advection ahead of the mid-week system are beginning to spread across the far northern portions of the forecast area, otherwise skies are clear with generally light winds. Current temperatures are cooler compared to 24 hours ago and range from the teens in the mountain valleys to the mid 30s to mid 40s elsewhere.

The next storm system remains on track for a Wednesday arrival. This system has matured with the center of circulation off the BC coast and is tapping into moisture from the central Pacific.

Precipitation is expected to begin across the far north on Wednesday then spread southward across the region Wednesday night into Thursday. It looks comparable to, or a little stronger than last week’s storm, with perhaps a little more valley rain and a bit less mountain precipitation. A second system follows for Friday and will continue showers across the region.

South wind gusts of up to 30 mph are expected across the Valley, and 50 mph or greater possible over the highest peaks. Snow levels will remain rather high with this storm with relatively light totals expected across major Sierra passes.

Extended discussion (Saturday through Tuesday)

Medium range models showing break in precip over Interior NorCal Saturday as short wave upper ridging moves through. Next Pacific frontal system progged to begin invading CWA Sunday afternoon with bulk of precip moving through Sunday night through Monday night. Tuesday appears to be mostly dry at this time under zonal flow aloft.