November 5, 2017 – Some light rain and mountain snow possible, mainly in the north, today into early Monday, otherwise dry into Tuesday with minor warming. Wet weather returns Wednesday into Friday.
Discussion
A very weak system moving over the northern sections today has been producing very light showers or sprinkles. The system will be slow to move southward not reaching the Sacramento area until Monday morning. Precipitation amounts will be light with trace amounts to a couple of hundredths for the Sacramento valley. The mountains will generally be under a couple of tenths of an inch. Snow levels will range from 3500 to 5000 feet with this system but accumulations are expected to be very light with no impacts expected. Some sprinkles or light showers may occur over the southern Sacramento valley early Monday morning.
Ridging will build in behind this system late Monday and Tuesday and bring dry conditions with slightly warmer temperatures to the region. Some patchy fog will be possible the next several mornings in the valley and for some of the mountain valleys.
A better system will take aim at the region starting on Wednesday. This system is expected to bring breezy to windy conditions to the region along with decent amounts of rainfall. Snow levels look high with this system but significant snowfall will be possible over the peaks. Some colder air will move into the region late Wednesday night into Thursday when snow levels should lower below major pass levels. Prior to that time period they may fluctuate near some of the pass levels.
Extended discussion (Thursday through Sunday)
Unsettled weather pattern will continue through much of the extended period. After the initial frontal passage on Wednesday or Wednesday night, successive weak shortwaves will continue to bring showery weather across the region Thursday and into Friday.
A shortwave ridge looks to bring a brief reprieve from the weather on Saturday. but yet another system lurks for later Sunday into Monday.