Weather 10-21-20



A cold front will deliver the mountains a shot of early season snow today while cool northerly winds channel down the Okanogan Valley into central Washington this afternoon. Accumulations in a convective environment are often highly localized and can briefly be heavy. Northcentral Washington weather forecast for today expect mostly sunny skies, a northwest wind 10-20 mph by afternoon with high temperatures in the mid 50’s. Those blustery north winds early this evening will subside through the night and with clearing skies, many locations will experience lows in the upper 20’s to lower 30’s for the first time this season. Wenatchee and Lewiston will likely dip below the freezing mark for the first time, too. Protecting tender vegetation may save your flowers for another couple of days, but the arrival of much colder air this weekend will be the end of the gardening season for the entire region.

On Thursday, most of the Inland Northwest will experience high temperatures in the upper 40’s to lower 50’s. Along with increasing cloudiness throughout the day, Columbia Basin and Wenatchee Valley temperatures will top out near 50 degrees.

By Friday, as advertised, weather variables are really coming together for an early winter storm to impact the entire Inland Northwest. An upper level low pressure trough will dig out across southern British Columbia on Friday at the same time as a much colder artic air begins barreling down from Canada. This Combination will provide the perfect ingredients for a pretty significant precipitation event for Northcentral Washington. The heaviest precipitation will occur from the east slopes of the Cascades to the Waterville Plateau, Wenatchee Valley and along the northern Columbia Basin. It`s also looking more and more likely that most areas will see snow, including places like Wenatchee and Moses Lake.  Weather forecast for Friday calling for Cloudy skies, a 90% chance of mainly snow showers and much colder with afternoon highs only in the lower to mid-30’s. That’s over 15 degrees cooler than our normal high temperatures for this time of year.

Snow Amounts: The valleys in the east slopes of the Cascade look to receive 5 to 8 inches with around a foot or more in the mountains. We’re looking at 4 to 6 inches of snow on the Waterville Plateau, the Wenatchee Valley and across the northern basin to the Okanogan Highlands.

For Saturday and the weekend, high pressure will build in behind the exiting winter storm system. This will usher in drier air, and temperatures will remain very cold into early next week as the Polar Vortex of cold air continues to sag south. Record cold temperatures will be possible Sunday into Tuesday. Weather for Northcentral Washington Saturday through Tuesday, expect mostly sunny skies each day and unseasonably cold with afternoon high temperatures mainly in the upper 30’s and lower 40’s.