A pair of back to back weather systems will inundate Northcentral Washington today and again tonight. Satellite pictures reveal a deep upper level low circulating off the coast this morning. A Southerly flow ahead of this low is bringing moisture into the forecast area from the south and will continue to do so for the next 24 hours. Two distinct short waves in this flow will enhance available moisture into two rounds of light snow, the first one during the day today over mainly the eastern half of the forecast area. The Wenatchee Valley can expect cloudy skies today with an 80% chance of snow developing by mid- afternoon and high temperatures in the upper 20’s. Little snow accumulation is expected during the day. By tonight, hot on the heels of this first wave will come another and potentially stronger short wave weather system. This wave will focus most of its energy over the western zones and bring at least solid advisory criteria for snow amounts in the Wenatchee/Waterville area, the Okanogan Highlands and Valley, and portions of the northern Columbia Basin with another 2 to 4 inches of snow is likely. The Wenatchee Valley can expect around 2-3 inches of snow overnight with lows in the lower 20’s.
On Thursday, the second storm system will exit to the northwest with drying conditions and sunny skies by afternoon with high temperatures in the lower 30’s.
To end our workweek on Friday, cold high pressure will take over our weather picture mostly sunny skies, light and variable wind and afternoon high temperatures in the lower 30’s.
Saturday through early next week, pressure gradients will continue to relax while temperatures will be unseasonably cold with highs 15 to 25 degrees below normal! Under mostly sunny skies, afternoon high temperatures Saturday through Tuesday will be in the upper 20’s with overnight low temperatures in the mid-teens. Fortunately, mostly clear skies will prevail creating rather pleasant late winter days. There are some disagreements, but the upper level flow could turn back to the southwest towards the middle of next week bringing a return of clouds, rain, snow, and possibly warmer temperatures.