Feb 3, 2015 9:25 PM by Kris Kuyper
Tuesday was a mix of sun and clouds around the North State, with a few light showers near the Oregon border. High pressure will temporarily build into California Wednesday, sending that plume of moisture northward and giving us partly to mostly sunny skies. But Wednesday will be the last time we see the sun until next week.
An atmospheric river is coming our way late this week, and it's bringing a lot of rain with it. The clouds from this subtropical plume of moisture will arrive Wednesday night, and look for a few showers on Thursday... but not much. The steady rain should begin Friday, but the heaviest part of that band will get hung up on the coast during the day. It arrives here Friday night, along with south winds that will gust 35 to 40 mph in the Valley. The Valley should pick up 1" to 2" of rain just Friday night, with higher amounts in the higher elevations! This is a warm storm, a Pineapple Express, so snow levels may start near 5500' on Thursday, but they will rise to near 7000' by Friday afternoon and stay there through the weekend.
The first surge of moisture will be though by Saturday, so look for a lull in the rain then... just a stray shower or two on Saturday. Round two arrives Sunday with more rain (although probably not quite as much as Friday night, and not as much wind). We'll still get soaked a second time however. Upper level low pressure will move in on Monday, turning the rain to showers with a slight chance of a thunderstorm then as well. As the low moves east Monday night, the sun will return Tuesday with a breezy north wind then as well.
Between Thursday and Monday, the Valley should pick up 2" to 5" of rain! Some mountain areas in the Siskiyous and northern Sierra could see close to 10". Looks like we're going to make up for our dry January in a hurry!
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