A very nice weather day is expected across Northcentral Washington today with partly sunny skies early with increasing clouds by this afternoon ahead of a massive storm system. Then, late tonight, a vigorous low-pressure weather system will spread a shield of precipitation into Washington, Oregon, and Idaho. This large feed of moisture is expected to produce 6 to 10 hours of light to moderate snow for the East Slopes of the Cascades, Wenatchee area, Okanogan Valley/Highlands, and Northeast Washington.
At this time, it looks like 3 to 5 inches of accumulation for Wenatchee, Chelan, Omak, and Waterville. For the East Slopes including Leavenworth, Stehekin, Mazama, and Winthrop around 4 to 8 inches of snow could fall by Saturday morning. A Winter Weather Advisory will go into effect at midnight for all of Northcentral Washington and will run until noon on Saturday. We have a 100% chance of snow tonight with 2-4 inches of new snow possible and a 80% chance of a rain/snow mix on Saturday where we could see another 1-2 inches of snow.
The active and progressive weather pattern rolls into early next week with a chance of scattered rain showers and very mild temperatures. Tuesday into next Thursday, we will see high temperatures in the lower to mid 40’s.