Be prepared for a very cold start to your Tuesday forecast, and then very active weather arriving through the day today. A Hard Freeze Warning is in effect in the valley and foothills through 9am this morning. Skies are mostly clear to start the day, and temperatures are very cold. Valley and foothill areas are ranging from the 20's to 30's this morning, and mountain areas have dipped into the single digits to lower 20's overnight. Winds are mostly under 5mph and out of the north this morning, but we'll see a big shift to stronger south winds this afternoon. Sustained winds up to around 25mph will be possible later today. Rain and snow will move into our coastal areas mid day and will spread across the remainder of northern California into this evening. Snow levels are mostly projected to be down to around 500' to 1000', but some areas closer to the coast could see snow levels at 0'. Winter Storm Warnings will go into effect for our coastal areas as early as 2pm today, our valley and foothill areas as early as 4pm, and will then extend up into the Southern Cascades by 7pm tonight. Warnings will expire early to mid day on Wednesday in the Northern Mountains and valley, but are set to remain in place through early Friday morning in the Sierra and Southern Cascades. Rain is likely, and snow will potentially dip down to the valley floor by this evening. Several inches of snowfall will be possible in Redding tonight through early Wednesday. We'll also have a good chance for snow down into Red Bluff, and Corning. Chico will even have a slight chance for snow late tonight throughe early Wednesday. High temperatures will top out in the low to mid 40's in the valley, 30 to 40 degrees in the foothills, and in the mid 20's to mid 30's in our higher elevations this afternoon. A High Wind Warning will go into effect at 8pm tonight and last through noon on Wednesday in our valley and foothill areas. Sustained winds out of the south up to 45mph are possible, and gusts up to 60mph are in the forecast during that warning time.
Snow will stay very low through the start of Wednesday morning, but will start to lift into the 2000' to 3000' range through the day on Wednesday. Heavy rain, and snow can still be expected through the day, and temperatures will stay very cold. Overnight low temperatures will not be as cold as Tuesday morning, but daytime high temperatures may end up a few degrees cooler. Winds will start to drop off as we head into Wednesday afternoon, but the heavy rain and snow will linger. Foothill areas and above will continue to get moderate to heavy snowfall, while valley areas mostly see rain after Wednesday morning. More rain and snow will continue through Thursday, but snow levels will lift into the 3000' to 4000' range. Friday we'll start to see this system winding down, but rain and snow are still likely. We'll even see a chance for some lingering active weather on Saturday. Another wet system will drop down the West Coast and bring additional rain and snow into our forecast from Sunday through early next week. 3 to 5 inches of rain will be possible in the valley through this weekend, while our higher elevations could be seeing anywhere from 4 to 12 inches of rain. Up to around a foot of snow will be possible in Paradise through this weekend, and we'll see up to around 6 to 7 feet of snow possible in areas above 4500'. This will be a major impact to mountain travel through the end of this week in our mountain areas. Major travel impacts are also possible in Redding late Tuesday night through mid day on Wednesday.