A broad southwest flow will continue as a trough of low pressure moves down the Canadian shore and towards the Pacific Northwest. The main impact over the next 2 days will be periods of mid and high- level moisture moving through. There will be enough breaks in clouds for central and eastern Washington to stay above normal temperature-wise for the next two days. Northcentral Washington weather forecast today calling for mostly cloudy skies and mild with highs this afternoon around 70 degrees. Mostly cloudy for Tuesday as well with highs once again around 70 degrees. This is likely the last 70-degree days we will see this year. Expect an increase in southwesterly winds as well Tuesday afternoon with gusts 15 to 25 mph across the Okanogan Valley, Columbia Basin and into the Waterville Plateau.
An upper-level trough and associated cold front will continue to move across the region Wednesday. Precipitation will be light, showery, and confined to the Cascades and the Northeast Washington mountains. The rest of the region will stay dry with overcast skies and breezy southwest winds with the frontal passage. The most notable feature of this front will be the dramatic change in temperatures on Wednesday. Afternoon highs will cool by 10 to 20 with extended forecasts projecting the PNW to remain in below average temperatures over the next 14 days. Partly cloudy skies for Wednesday and much cooler with afternoon highs in the lower 60’s.
A cool and unsettled weather pattern will continue through the rest of the week and into the weekend as the upper level trough digs down the west coast.
Thursday and Friday’s weather will be partly cloudy to mostly sunny and cool with highs in the lower 60’s.
A robust weather-system moves in later Saturday accompanied by stronger upper level dynamics and better moisture to move southeastward into the region. There is increasing confidence for widespread precipitation and breezy to gusty winds with this system. Snow levels over the Cascades will drop below 5000 feet during the day Sunday and to below 3000 feet Sunday night. Weather for Saturday, increasing clouds and cool with afternoon high temperatures in the mid-60’s. By Sunday precipitation moves in bringing a 40% chance of rain and cool temperatures with highs around 60 degrees.