Modest showers to light rain continued across Northern California today and the wet weather is expected to pick up as another system will begin to impact our region tonight. Most of the valley will see up to a half an inch of rainfall from tonight through Thursday, but the far northern portions of the valley and higher elevations could see between a half an inch to an inch of rain during that time. Snow levels are down to around 5500' in Shasta County, but are currently upwards of 7000' in areas above Lake Oroville. Snow levels will rise into the 6000' to 8000' level tonight through Thursday. Light showers with pockets of modest rain are expected for your Thursday forecast, and showers will persist through Friday. Temperatures will stay on the warmer side tonight, and are only expected to dip into the mid 40's to low 50's in the valley. Mountain areas will mostly dip into the mid 30's tonight. High temperatures will top out in the mid to high 50's on Thursday afternoon in the valley and mountain areas will mostly end up in the mid to high 40's.
Up to an additional half an inch or rain can be expected in the valley from Friday through Saturday.The Northern Mountains will see the heaviest rain and snow from Friday through Saturday, with up to an inch of precipitation expected. Temperatures aren't expected to change much on Friday, but will drop by around 4 to 5 degrees on Saturday. Snow levels will dip back to around 5000' to 6000' on Friday and will then drop even further into the 3500' to 4500' range on Saturday. Showers will become lighter and more scattered as we head into Saturday, but some mountain travel impacts can still be expected as we head into your weekend. Some light snow can be expected on I-5 to the North of Redding, and areas of Lassen National Park could see up to a half a foot of snow from Friday through Saturday night. Sierra travel impacts will be likely from Friday night through Saturday evening.
Dry weather and clearing skies will return to Northern California on Sunday. Temperatures will be chilly in the morning, and a bit cooler in the afternoon. Valley areas will dip into the low to mid 30's on Sunday morning, and mountain areas can expect low temperatures in the 20's. Some morning fog will be possible on Sunday and Monday. The next chance for wet weather will return on Tuesday of next week, but confidence between model runs is currently fairly low on that. We'll get a much better idea on what to expect for the middle of next week as we head through this weekend.