Satellite reveals a deep upper level trough of low pressure just off the Pacific coast with a deep and tightly wrapped up occluded surface low pressure over Vancouver Isle this morning. A warm front appending off of this weather system has brought some warming and breezy conditions to the eastern basin overnight while promoting heavy snow over the Cascades and the northern tier zones. Expect clearing skies throughout the day with slightly warmer temperatures this afternoon into the lower 30’s.
A bit of a weather break on Friday with partly cloudy skies and afternoon high temperatures in the lower to mid-30’s. F
riday night through Saturday night, the next round of precipitation arrives as another weather system pushes through the Inland Northwest. The timing looks a bit faster with precipitation starting Friday night especially across the Cascades into Northcentral Washington. Chance of snow late Friday night is 80%. Snow increases region-wide Saturday as a frontal boundary sweeps through Northcentral Washington. Temperatures will warm up a bit Saturday as well so expect possibly a rain/snow mix with an 80% chance of precipitation.
An upper level ridge amplifies over the region on Sunday with mostly cloudy skies and afternoon high temperatures much warmer into the upper 30’s.
For Martin Luther King Day on Monday, look for cloudy skies with mild high temperatures into the lower 40’s.
On Tuesday and into Wednesday, the upper ridge axis shifts east as another weather system sweeps in from the Pacific Northwest. Precipitation chances increase in the Wenatchee Valley Tuesday into Wednesday with a 40% chance of rain or snow Tuesday and a 20% chance on Wednesday with afternoon highs both days into the upper 30’s to lower 40’s.