The Inland Northwest will enjoy another mild weather day today with light winds, sunny skies and afternoon high temperatures above normal into the lower 60’s.
For Friday, a fast moving cold front will produce windy conditions by afternoon and into Friday evening. A tight westerly surface pressure gradient will produce wind speeds out of the northwest between 20-30 mph with gusts around Northcentral Washington 40-45 mph. Under mostly sunny skies, highs Friday will once again be above normal into the lower and mid 60’s. A Wind Advisory for Friday may be necessary. A few broken tree limbs, widely scattered power outages, and treacherous cross winds (north/south roads) will be the primary impacts. Big weather changes for Saturday as a shortwave disturbance will move down out of Canada on the backside of the upper level trough of lower pressure. This will tighten the northerly pressure gradient with a second surge of winds down the Okanogan Valley for the morning and into the afternoon. Wind gusts are expected to pick up to between 30-40 mph and peak around late morning or early afternoon. Under sunny skies and northwest winds 10-15 mph Saturday, afternoon high temperatures in the Wenatchee Valley will be much cooler down into the lower to mid-50’s.
Sunday through Wednesday of next week, the weather pattern will be highly amplified with cold air surging across the Central U.S. under a deep trough of low pressure. At the same time, strong ridging of higher pressure is located over the eastern Pacific. Expect sunny skies each day and clear skies each night with afternoon highs Sunday through Wednesday mainly in the low 50’s with overnight lows near 30 degrees. We could also be looking at a period of stagnant conditions with pollutants building up near the surface throughout next week.