A dry weather break is expected today under a flat and short-lived upper level ridge of high pressure in the wake of yesterday`s trough passage. Northcentral Washington can expect increasing clouds today, west wind 5-15 mph with afternoon high temperatures just slightly below normal into the lower 50’s.
Quiet weather is expected for Friday as well in the Wenatchee Valley with mostly cloudy skies and warmer temperatures with highs in the mid to upper 50’s.
Then Saturday, through next week, the overall weather flow regime will become moist and progressive. Mostly cloudy skies for the weekend with a 40% chance of rain showers Saturday afternoon and evening and a 30% chance on Sunday with afternoon high temperatures both days in the upper 50’s to near 60 degrees.
With a progressive spring time weather pattern, weather models are showing pretty low confidence of forecast details beyond Sunday`s short wave passage. For now, it looks like scattered showers Monday and Tuesday with highs in the upper 50’s and then partly cloudy skies on Wednesday with afternoon highs near 60.
What is of higher confidence will be the prospect of frequent breezy conditions most afternoons with the polar jet stream transiting a series of surface low pressures through Southern Canada maintaining a moderate southwesterly gradient across the forecast area. Most of the windiest areas will be the Columbia Basin and parts of the Waterville Plateau.