A rather flat ridge of high pressure over the area shows a slight bit of warmer southwest to northeast reorientation as ridging downstream amplifies. The end result is a warming trend allowing for forecast temperatures on the warm side of normal for this time of year. Northcentral Washington weather today calling for mostly sunny skies, a light west breeze with afternoon high temperatures above normal, in the lower to mid-50’s.
Tomorrow and Thursday, the Inland Northwest will be under a southwesterly flow with longwave troughing of lower pressure over the eastern Pacific and ridging of high pressure over the Rockies. Warmer temperatures being pumped northwards will result in a continued warming trend into Friday.
Forecast for Wednesday and Thursday expect beautiful late winter weather with mostly sunny skies tomorrow with highs in the lower 50’s, partly cloudy for Thursday and warmer with highs in the lower to mid-50’s. Moisture will be advancing across the western portion of Washington State by Thursday night into Friday with precipitation across the Cascades possible.
The added cloud cover there will result in noticeably cooler temperatures over that portion of the region compared to eastern Washington; Moses Lake to Spokane, where afternoon high temperatures will be in the upper 50s to lower 60s for highs on Friday. Not quite that warm for the western section of our viewing are but still unseasonably warm with high temperatures Friday for Wenatchee in the mid 50’s. Also, on Friday, precipitation in western Washington will bring us just a slight chance for a sprinkle or two.
On Saturday, Sunday and Monday, we will see the upper level trough offshore make a slow transition inland. Saturday will still be unseasonably warm with partly cloudy skies and afternoon highs in the lower to mid-50’s. Temperatures will be quite mild until we see the slightly colder air move in on Sunday. Expect partly cloudy skies Sunday and slightly cooler with highs in the upper 40’s while on Monday temperatures will drop back to slightly below normal readings for this time of year with highs in the mid to upper 40’s.