Light snow possible Friday, but no big storms yet
WEDNESDAY NOVEMBER 25…5:25 AM…..Thanksgiving is shaping up to be a beautiful fall day across the Tahoe region, and the holiday weekend should be crisp but mostly fair and maybe a bit breezy. The next major storm for the basin is probably at least a week away.
A deep low pressure system in the Gulf of Alaska and a ridge of high pressure over the West are dictating our weather pattern for the moment. The low is sending out waves of energy, but as they approach the west coast of the U.S. these waves are being pushed back to the north and into the Northern Rockies. Nothing for the Sierra. Nothing for Tahoe.
The latest wave of energy is headed our way late on Thanksgiving Day or early Friday. It will likely bring some high winds and cloud cover, and perhaps a snow shower or two. But it appears certain to break apart as it hits that ridge, with most of its energy going north, and what remains falling completely apart before it reaches as far south as Interstate 80. If we get any snow at all it will be light and scattered and should not amount of much accumulation. Another piece of energy might ride south on northerly winds aloft on Saturday, but that piece looks aimed more for eastern Nevada and Utah than the Sierra. This “inside slider” would have to veer hundreds of miles off its current path to the west in order to bring snow to Tahoe. The winds carrying that system on a north to south trajectory, however, could also bring us cooler temperatures for the weekend.
Then the ridge of high pressure will rebuild and temperatures should warm a bit on Monday and Tuesday. There are some signs of a pattern change by the middle of next week, with a warmer, wetter flow from the Central Pacific. That wouldn’t necessarily be what we are looking for. But it would be consistent with the El Nino condition that so far has not begun to shape our weather. And it might be the start of something big if that moisture plume could hook up with a blast of cold air from Alaska.
Have a safe and Happy Thanksgiving. Think snow. We will continue to post updates here through the weekend.