Much cooler temperatures and the potential for showers are on the way for your Friday and weekend forecast. Low pressure is tracking down the coast from the Gulf of Alaska, and bringing big changes into our region today. A Winter Weather Advisory is in effect from 10am this morning through 10pm tonight in the Sierra, Cascades, and a portion of Trinity county. Temperatures are starting out fairly warm ahead of this cooler system for the start of your Friday. Valley areas are in the 50's to 60's this morning, while foothill areas are in the 50's, and mountain areas are mostly in the 40's. Winds have picked up overnight, and are out of variable directions this morning. We'll see winds become lighter as we head into your afternon. Showers have already started to track across the northern portions of our region this morning, and will continue to spread to the south through Saturday. The majority of the shower activity will be in the foothills and mountains today, but valley areas could also get some light showers moving through. There will also be a chance for thunderstorms across northern California this afternoon and evening. Snow levels will dip to as low as 3500' today and tomorrow. High temperatures are expected to be in the low to mid 60's in the valley, 50's in the foothills, and 40's in most mountain areas later today.
Overnight low temperatures will become colder tonight, with valley areas dipping into the 30's to lower 40's. Foothill areas can expect low temperatures in the 30's to mid 40's, and mountain areas will dip into the teens to 20's overnight. Rain and snow showers will continue through our region this weekend, but will become more sparse on Saturday. High temperatures will top out in the upper 50's to lower 60's in the valley, in the 40's to 50's in the foothills, and in the 40's in the mountains on Saturday afternoon. A second wet system will drop into our regoin on Saturday afternoon and will bring heavier mountain showers, and cooler temperatures from Saturday night through Sunday. A Winter Storm Warning has been issued for the Western Slopes of the Sierra from 4pm Saturday through 4pm Sunday. Temperatures will be a little cooler for your Sunday morning and afternoon. We'll dry out on Sunday night, but stay chilly for the start of next week.
Mostly sunny to partly cloudy skies are ahead for your Monday and Tuesday of next week, and we'll be staying chilly across our region. Dry weather is expected on Monday and Tuesday. Another wet system will brush through to our north on Wednesday and that will bring a slight chance for showers back into our region through Wednesday night. A more substantial wet system is currently projected to bring a better chance for rain and snow back into our forecast late next week.