Rain and snow are returning to Northern California tonight, and this wet system is expected to bring much bigger impacts to our region than the one that passed through last night. Multiple counties have Winter Weather Advisories going into effect this evening and lasting through tomorrow morning. For Western Siskiyou County the Advisory will go into effect at 6pm tonight and last through 6am Thursday. For Eastern Siskiyou County the Advisory will go into effect at 9pm tonight and last through 6am Thursday. Snow levels will be down to around 3000' in those areas ans we could see between 2 to 7 inches of snowfall through early tomorrow. Trinity, Lassen, and Plumas Counties will have the Winter Weather Advisory in effect from 10pm tonight through 10am Thursday. Trinity County could see 4-8 inches of snow down to 3500', while Lassen and Plumas Counties could see up to 5 inches of snow down to 3500'. For Shasta County mountain areas the Advisory will go into effect at 6pm tonight through 7am Thursday morning, with the potential for 4-8 inches of snow down to 3500'. The Western Slopes of the Sierra will have the Advisory take effect at 10pm tonight through 10am Thursday with. Those areas could see 4-8 inches of snow down to 3500'. Valley areas are mostly projected to see up to around a third of an inch of rain tonight through mid day tomorrow, but Redding could see up to around a half an inch of rain. Showers are projected to arrive late tonight and to last through around noon on Thursday. Dry weather is expected from tomorrow afternoon through most of Friday. Temperatures are projected to dip into the high 30's to low 40's in the valley overnight and will climb back into the mid 50's tomorrow afternoon. Mountain areas will mostly dip into the 20's tonight and then climb back into the high 30's to low 40's tomorrow afternoon.
Temperatures are expected to become several degrees cooler from Thursday night into early Friday. You may want to bundle up if you're heading out early Friday morning, but you won't need that jacket if you'll be home by the early evening. Showers will then return to Northern California on Friday night and will persist into Saturday. The heaviest showers are expected to be in the mountains, and snow levels will be in the 4000' to 5000' range during that time. Snow levels could become slightly lower as we head into Saturday evening. Another wet system will then impact Northern California Sunday into Monday. Showers will be modest in the valley during the Friday to Saturday system, and most of the showers on Sunday are currently projected to stay in the mountains. Temperatures will top out in the low 50's in the valley for both days this weekend.
The potential for more wet weather is currently in the forecast as we head into next week. The heaviest showers are still projected to fall in the mountains, but valley areas may see a bit more of an impact on Monday. Scattered showers will be possible on Tuesday, and then we'll have rain and snow showers with lower snow levels possible on Wednesday. The current long range outlook even puts a chance for some snow on the ground in Redding on Wednesday morning. That's still a ways off and is subject to change, but it's worth keeping an eye on as we get closer to next week.