Grab your jacket and be prepared for a cooler start to your Friday across northern California. High pressure off the coast and to our east will keep our region dry and warm on Friday, but low pressure tracking south along the coast is spreading some thin clouds over us to start the day. The partly cloudy skies will give way to sunny to mostly sunny skies for your afternoon. Temperatures are starting out in the 30's to 40's in the valley and foothills, while mountain areas have dipped into the teens to 20's overnight. Winds will be much lighter through your Friday, but will still be out of the north in the valley. East winds will be slightly breezy in the Sierra, with gusts up to around 20mph possible through the day. High temperatures will top out in the upper 60's to mid 70's in the valley, upper 50's to mid 60's in the foothills, and mid 50's to upper 60's in our mountain zones for your Friday afternoon. All around, it looks like a very pleasant afternoon to get outdoors.
Sunny skies, and very similar conditions are ahead for your Saturday. We'll start out fairly chilly in the morning, but then end up warm and comfortable for the afternoon as high pressure stays strong across the West Coast. Low pressure will track into the Pacific Northwest on Sunday, and that will start to usher in some substantial changes through the early portion of next week. We'll have a modest increase in clouds and drop in temperatures ahead for your Sunday. Models are also hinting at a slight chance for some mountain showers close to the Oregon border Sunday afternoon and night. Temperatures in the valley will dip back into the upper 60's on Sunday, while foothill and mountain areas range from the upper 40's to lower 60's. Winds will also start to pick up out of the north Sunday afternoon, and gusts up to 40mph will be possible in the valley. Northeast winds will be picking up in the Sierra and foothills, where gusts up to 45mph will be possible Sunday night into early Monday.
Much cooler temperatures, more clouds, gusty winds, and the potential for mountain showers is ahead for your Monday and Tuesday of next week. Valley areas will start out in the 30's and top out in the upper 50's to lower 60's. Foothill areas will start out in the 30's to lower 40's and end up in the 40's to lower 50's early next week, while our mountain areas will start out in the teens to 20's and climb into the 30's to 40's Monday and Tuesday. Our best chance for showers will stay in our higher elevations, but we can't rule out a trace of rain in the valley from Monday through Wednesday. Snow levels are projected to dip into the 3500' to 4500' range, but that is subject to change depending on how deep this trough actually digs. The gusty winds will result in elevated fire danger across our region from Sunday through at least Tuesday. Lighter winds, slightly warmer temperatures, and dry conditions are expected to return from Wednesday into Thursday of next week.