Be prepared for another very active day across Northern California. Wet weather will be in the form of showers early today, but will ramp up heading into your afternoon. Heavier rain and snow are likely later today, and gusty South winds are expected to develop. Sustained winds will be out of the South to 20mph, with gusts to 35mph this afternoon. Heavy rain and snow are likely in the region this afternoon through tonight. Snow mixed with the gusty South winds could result in very low visibility in the mountains through tonight. A Winter Storm Warning will go into effect for areas above 3000' in the Sierra at 2pm today, and will stay in place through 11pm Friday night. The potential for thunderstorms in the valley does not look as promising today, but will return for your Friday and Saturday afternoons in the valley. Temperatures are starting out in the high 30's to low 40's in the valley this morning, and are in the 20's to low 30's in the mountains early today. High temperatures are projected to top out in the low 50's for the valley this afternoon, and mountain areas are expected to end up in the mid 30's to low 40's. Snow levels will range from 2000' to 3000' in the Northern Mountains, and from 3000' to 4000' in the Sierra and Foothills.
More active weather is on the way for your Friday, but the main impact from the wet weather will shift into the mountains. Valley areas will still likely have scattered showers and the potential for thunderstorms through Saturday, but the more impressive precipitation totals will end up in the mountains. Several more inches of snow will be possible across the mountains through Saturday night.
Some mountain showers may linger on Sunday, but mostly dry weather will return to the valley. Monday looks dry across the board for Northern California, and temperatures will be slightly warmer. The next wet system is projected to return either Tuesday or Wednesday of next week, depending on which models you look at. Looks like the return on showers on Tuesday is becoming the more likely solution. We will continue to track the next wet system over the next few days, and get a better idea of what's in store for next week when models come into better agreement.