Northcentral Washington will be under a broad northwest flow of air aloft sandwiched between a deep low over the Canadian Plains and a flat ridge of high pressure in the Eastern Pacific.
Weather for Wednesday calling for mostly cloudy skies, calm wind with afternoon high temperatures in the mid to upper 30’s.
A weak shortwave weather system currently crossing the Gulf of Alaska will drop down the Washington Coast and swing into Oregon over the next 36-48 hours. Moisture streaming out ahead of the wave will get entrained into the northwest flow currently over our area leading to thickening clouds and potential for precipitation starting Thursday morning. At this time, thinking the main precipitation will fall south of a line from Lake Chelan to Moses Lake to Pullman. Snow amounts for most Northcentral Washington locations like Wenatchee, Moses Lake, and Leavenworth look to be less than an inch. Forecast for Thursday expect cloudy skies with a 40% chance of rain mixed with snow, afternoon high temperatures in the mid to upper 30’s.
As the Thursday weather system moves through, Friday and Saturday look nice with mostly sunny skies, calm wind and high temperatures in the upper 30’s to near 40 degrees on Friday, cooling into the mid 30’s on Saturday.
Then, between late Saturday night and Monday the next weather system moves into Northcentral Washington. Sunday will be cloudy with a 30% chance of snow and cooler with afternoon highs in the lower 30’s.
By Monday and Tuesday, Quiet and cool weather will be in our forecast with partly cloudy skies each day and afternoon high temperatures cooler than normal in the lower to mid 30’s.