I hope everyone took advantage of the very pleasant and comfortable weather across Northern California today, because a very potent wet system is set to arrive this weekend. Skies were partly cloudy, temperatures were mild, and winds were modest for your Friday afternoon. Temperatures topped out in the mid 70's to low 80's in the valley, and in the 60's to low 70's in the foothills and mountains. Winds have been out of the North up to 10mph in most areas, but a few cities had winds up to around 15mph.
We'll be staying mild and dry through the start of your Saturday, but the potential for showers will spread from West to East as we head into your afternoon and evening. Showers are currently projected to arrive along the Coastal Range and Northern Mountains late in the morning, before moving into the Northern Valley late in the afternoon. Showers will become more widespread on Saturday night. Temperatures will start out in the 50's in the valley on Saturday morning and will end up in the mid to high 70's in the afternoon. Foothill areas will start out in the 50's and end up in the 60's to low 70's, while mountain areas start out in the 40's and end up in the 60's to low 70's on Saturday. Winds will be out of the South to around 20mph, with gusts up to around 40mph in the valley on Saturday and Sunday. Sierra locations can expect gusts up to 60mph out of the South late Saturday and Sunday. A Wind Advisory is currently set to go into effect from 11am through 8pm Sunday along the Eastern Slopes of the Sierra, but we could see more areas added to that Advisory as we move into the weekend.
Cooler temperatures, widespread showers, high elevation snow, the threat of thunderstorms and gusty winds will all be on the way for your Sunday. The best threat of thunderstorms will be in Tehama and Shasta Counties, and we could be seeing snow levels dipping to around 6000' by Sunday evening. A Winter Weather Advisory is set to go into effect on Sunday night through Monday night in portions of the Sierra above 6000'. Gusty winds and heavy snowfall could result in very low visibility and slippery roads. Avoid mountain travel during that time if you're able to. Showers are expected to be very heavy for this time of year, and we will have the potential for water ponding on roads. Thunderstorms could bring periods of heavy rain and hail to our region on Sunday afternoon and evening.
Monday is expected to be even more active than Sunday, but winds are not expected to be quite as strong. We'll continue to track moderate to heavy showers, and the threat of thunderstorms will become more widespread on Monday afternoon and evening. Impressive rain totals and accumulating hail will be possible in areas impacted by thunderstorms and that could result in dangerous driving conditions. We'll continue to have the potential for lighter showers on Tuesday, but temperatures will become warmer than Sunday and Monday. The chance for showers will linger on Wednesday, but will mostly be limited to mountain areas. Temperatures will be back in the mid 70's in the valley on Wednesday and will return to the low 80's on Thursday. We'll be mostly dry, with sunny skies and average temperatures for the latter half of next week.
The current storm total projection brings up to 3 inches of rain to the Northern end of the valley, foothills, and Sierra. Up to 2 inches of rain is expected in the mid valley.