Mostly sunny skies in our weather forecast for Wednesday with a west breeze, afternoon high temperatures will top out in the lower 50’s.
Our ridge of high pressure and zonal flow will amplify on Thursday with warmer temperatures and sunny skies, highs should reach the mid 50’s.
Filtered sunshine for Friday with calm wind conditions and afternoon high temperatures once again in the mid 50’s.
The period of benign weather will deteriorate Friday night and Saturday with weather models indicating the arrival of a vigorous short-wave weather trough probably producing a field of mountain snow and valley rain/snow mix Friday night and into Saturday morning. Northcentral Washington can expect mostly cloudy skies Saturday with a 30% chance of rain and high temperatures in the lower 50’s. The Cascade crest may receive appreciable amounts of snow accumulation near pass levels and travel across Stevens Pass may be slippery and tricky Friday night and Saturday, but otherwise snow accumulations from this system look minor and confined mainly to northern valleys. The main issue on Saturday, or at least the most noticeable to the majority of the population, will be breezy and gusty winds with a strong cold front passage and a pressure gradient feeding winds into a passing surface low across southern Canada. No wind highlights are expected at this time but gusts on exposed terrain of the basin and ridges to 35 or 40 mph are possible.
Dry and mostly sunny weather is expected for Sunday with afternoon high temperatures in the lower 50’s.
Our zonal flow becomes moist on Monday and Tuesday with a 40% chance of rain each day and afternoon highs in the lower 50’s.