Dry with a warming trend through mid week, then cooler and a chance of showers mainly Friday and Saturday.
Discussion
High pressure will build over the region the first half of this week bringing a warming trend each day through Wednesday or Thursday. Temperatures will warm to near seasonal normals today with breezy northerly winds for the valley. Wind gusts will mainly be in the 15 to 25 mph range but some local areas over the westside of the valley may each around 30 mph.
Continued warming to above seasonal normals both Tuesday and Wednesday with low 80s forecast for the first time this year over the southern half of the Sacramento valley, Delta and northern San Joaquin valley on Wednesday. Not a lot of change in temperatures are expected for Thursday as a low deepens in the Gulf of Alaska and begins to flatten the ridge.
Models are indicating some showers over the north end of the valley and northern mountains Thursday evening with currently a 5 to 25 percent probability.
Extended Discussion (Friday through Monday)
Large upper low approaches the CA coast Friday, lingers off the coast Saturday, then pushes through SoCal Sunday afternoon into night. This will result in unsettled weather with showers and mountain snow showers Friday and Saturday over interior NorCal with highest QPF and POPs over the northern and eastern foothills and mountains.
Storm total WPC QPF showing generally less than half an inch in the Central Valley with around a half to 1.5 inches of liquid QPF in the foothills and mountains. Snow levels begin around 5500 to 7000 feet Friday then lower to 4000 to 5500 feet Saturday. Snow accumulations of 3 to 8 inches possible above 5500 feet with local amounts 12 to 15 inches.
Short wave upper ridging moves through interior NorCal Sunday, then EPAC ridge slowly builds inland early next week resulting in drier weather.