A strong cold front will approach Northcentral Washington today and move through this afternoon and evening. The main weather focus will be the gusty winds which could be on the order of 40-50 mph for some areas of the Columbia Basin. Areas of light to moderate rain will also fall across the Cascade Crest, and at times expand into far eastern reaches of Washington.
Weather forecast for today, expect mostly cloudy skies, breezy in the Wenatchee Valley and windy for the Columbia Basin and Waterville Plateau with a 40% chance of mainly afternoon rain with high temperatures today in the upper 60’s. Strong winds will bring the potential for blowing dust near recently plowed fields in the Western Columbia Basin including locations like Moses Lake, Ephrata, and Odessa. There is also a potential for blowing ash near the Pearl Hill, Cold Springs, and Greenhouse burn scars on the Waterville Plateau, Okanogan Valley, and Colville Reservation. Boaters and recreationists should be prepared for choppy lakes. Lastly, we cannot rule out some tree damage and power outages but given the weaker wind speeds compared to Tuesday, these impacts should be quite isolated.
On Saturday, we will see a shift toward north and northeasterly winds at the surface as cooler air spills into Northcentral Washington. Under mostly cloudy skies, afternoon highs on Saturday will dip back into the upper 50s to lower 60s, a few degrees shy of mid-October normal readings.
For Sunday and right through most of next week, an upper level ridge of high pressure, that’s been stationary, remains off the coast and the axis oscillates east and west a bit over time through this interval but remains off the coast. As a result, the jet stream will remain within close proximity along with the east edge of the ridge with orientation to provide a prolonged interval of a northwest air-flow and stable weather conditions. There is a 30% chance of showers Sunday morning as the weather system moves east with afternoon highs, cooler, into the upper 50’s.
A cool northwest flow of air will keep our temperatures down Monday through Thursday under partly to mostly cloudy skies, afternoon high temperatures will slightly below normal into the mid and upper 50’s.