Be prepared for more active weather on the way in your Monday forecast as the system that brought rain, snow, and thunderstorms to northern California ramains in our region today. Low pressure centered in northeast California will shift into Nevada through the day, but will continue to bring the potential for rain, snow, and thunderstorm activity to our region through tonight. High pressure off the coast in the Pacific will build into the West Coast after today, and will bring the return of dry weather and a substantial warming trend into our forecast for the remainder of this week. Some scattered rain and snow showers have persisted in our higher elevations overnight, and that's where we'll continue to have the best chance for active weather today. There will be a slight chance for some light showers in the valley, but most models keep the wet weather in our higher elevations. Snow levels are down to around 3000' to 3500', but will lift to around 4500' this afternoon. The Winter Storm Warning that was set to stay in place in the Sierra through this morning has been allowed to expire early, but a Winter Weather Advisory will be in effect through 11pm tonight in Modoc County. We also have a Frost Advisory in effect in Trinity County through 9am this morning. Skies are mostly clear to partly cloudy in the valley to start the day, but we're still partly to mostly cloudy in our foothill and mountain areas this morning. Scattered showers have persisted in some mountain zones, and there will be more showers for our higher elevations this afternoon. There will also be a chance for some thunderstorm activity in the Sierra and Southern Cascades again today. Temperatures are starting out in the 30's to 40's in the valley and foothills, and in the 20's to 30's in our mountain areas this morning. Winds will mostly be out of the south to 15 mph this afternoon. High temperatures are projected to top out in the mid to high 60's in the valley, and in the mid 40's to upper 50's in the foothills and mountains later today. The threat of active weather will persist through Monday evening, but we'll be dry on Tuesday.
High pressure will build into northern California from the Eastern Pacific on Tuesday, and will be the dominant feature in your extended forecast. Dry weather, sunny to mostly sunny skies, and a warming trend is on the way from Tuesday through Friday. A Frost Advisory has been issued for Trinity County from midnight through 8am Tuesday in Trinity County. Temperatures will be warmer for your morning and afternoon on Tuesday. Valley areas will climb back into the upper 70's to lower 80's, while foothill and mountain areas return to the upper 50's to upper 60's on Tuesday afternoon. Skies will be sunny to mostly sunny on Tuesday. Dry and warmer weather will persist through the rest of this week. Temperatures will end up back in the mid 80's to lower 90's in the valley from Wednesday through Friday, and we'll have temperatures in the 70's to 80's in our foothill and mountain areas from Wednesday through Friday. Some cloud cover is expected on Thursday and Friday, but we'll stay dry.
Partly cloudy skies, and a very modest dip in high temperatures is on the way for your Saturday. We'll then end up sunny and a couple of degrees cooler on Sunday. Temperatures are mostly projected to top out in the mid 80's in the valley, low to mid 70's in the foothills, and 60's to lower 70's in our mountain areas this weekend. The current outlook keeps us dry from Tuesday through this upcoming weekend.