Another round of dense fog has developed in West Side Valleys this morning. The fog will begin breaking into midday as a cold front moves south and east across the region. This will help to flush out the trapped polluted & cold air in the lower elevations. For this reason, the air stagnation advisory in place across Southern Oregon will lift this afternoon.
Scattered showers will begin developing at the Coast through the morning and spread inland around lunchtime to areas west and east of the Cascades. By mid afternoon, shower activity should move into Siskiyou County.
Because temperatures have been so cold all week in the Valley, I am not expecting much of a warm up this afternoon west of the Cascades. With highs in the 30’s, showers that develop across West Side Valleys may be in the form of snow. With that being said, both rain and snow showers are expected today but with little to no accumulations.
As the cold air settles in behind the front, snow levels will sharply drop. They will start around 5,000’ and drop by this evening to 1,500.’ Post frontal showers in the overnight hours will be isolated and fairly light, tapering off by the morning hours.
Thursday will be dry with a good amount of sun over the valleys before our next storm moves in for the end of the week. Snow levels will be high with this storm & primarily rain is expected Friday into Saturday morning. By midday Saturday and through the remainder of the weekend, dry air will move in.
Meteorologist Alyssa Caroprese