November 21, 2016 – A few lingering showers continue today. The next weather system moves into NorCal late Tuesday into Wednesday followed by another later on Thanksgiving into Friday. Winter Weather Advisory from 6 PM Tuesday to noon PST Wednesday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.
Upper trough is moving across NorCal early this morning. Remaining showers have ended across most of the Central Valley allowing for some patchy fog to develop, though elsewhere scattered showers continue across much of the northern Sierra and Cascade Range.
Temperatures are running a little cooler across most of the region and currently range from the upper 20s and 30s in the mountains to the 40s and lower 50s elsewhere.
Active weather pattern continues this week. There will be a brief break behind today`s exiting system before another moves into the region later Tuesday into Wednesday. This one will be colder with lower snow levels, but overall QPF will be less than what we saw over the weekend. Travel impacts will be likely over the northern Sierra passes Tuesday night into midday Wednesday.
Another break is expected later Wednesday into midday Thanksgiving when the next weather system is scheduled to arrive. This one is forecast to gradually push southward later Thanksgiving into Friday.
Extended discussion (Friday through Monday)
Forecast models are in fair agreement to the progression and timing of another upper level storm system that will move into northern California for the end of the week and into the weekend. Strong jet stream winds could translate into windy conditions for higher terrain between 25 and 35 mph for Friday afternoon and evening and again Saturday evening. This stormy pattern will bring rain showers to the Valley and snow to elevations higher than 4000 feet. High temperatures will remain near to slightly below normal in the 50s/60s for the Valley and 30s/40s for higher elevations.