Significant warming has taken place over the last 24 hours across much of Northcentral Washington. Safe to say that pre-frontal warming with breezy surface winds will help usher in the atmospheric river conditions to the Pacific Northwest over the next 48 hours. The cold front will move through eastern Washington later today as the jet stream slides south, shifting the winds more out of the west at the surface. Wind advisories are in place for much of Central and Eastern Washington. The strongest winds today look to be along the eastern slope valleys along the Chelan/Douglas county line and the Waterville Plateau with steady westerly winds 10-20 mph with gusts to 30 mph. Cloudy skies in our weather forecast today as that cold front moves through with a 50% chance of rain today and warm with afternoon highs in the lower to mid-50’s.
A cold pool of air settles over Northcentral Washington tomorrow and remains in place throughout the day Tuesday with a secondary shortwave of moisture that will slide south along the Pacific coast through the day Tuesday bringing a 30% chance of mainly rain, with highs in the mid to upper 40’s. Breezy tomorrow as well with west winds 10-15 mph.
A well-needed break from any significant weather is on tap for Wednesday as an upper level ridge of high pressure briefly moves over the region Wednesday morning. Under this dry airmass, skies will be sunny with much less wind and afternoon high temperatures in the mid-40’s.
By Thursday and Friday, two weather systems are expected to move through the Pacific Northwest back to back with the first one looking to move through early Thursday morning and the second one sometime between Friday afternoon and evening. We can expect mostly cloudy skies each day, a 30% chance of a rain/snow mix with afternoon highs in the mid-40’s.
As the trough moves out of the area late Friday, an upper level ridge of high pressure will briefly move over the Pacific Northwest bringing sunny skies both Saturday and Sunday with highs in the mid 40’s.