A major storm system is moving in from the north this morning and will drastically change our current weather pattern. Expect mostly sunny skies today ahead of the weather system with breezy northwest winds 10-15 mph with highs today in the lower 70’s.
Friday the big weather maker for the weekend will move into the Pacific Northwest. A closed low pressure system will move into the Inland Northwest bringing a 30% chance of afternoon showers and much cooler temperatures with highs Friday only in the lower 60’s. Friday night, the upper low will move into the Columbia Basin and cold surface high pressure will push down from Canada along the Continental Divide. This will turn our winds to the northeast and our colder air will move into Northcentral Washington. Expect an 80% chance of rain Friday night with overnight lows dropping down into the lower 40’s.
For the upcoming weekend on Saturday and Sunday, the unseasonably strong cold front from Friday night will bring a surge of strong north winds that will peak on Saturday and remain gusty well into Sunday. The deep upper low pressure system associated with the cold front is expected to descend out of Canada early Saturday morning and stall over Southern Washington and Northern Oregon Saturday and Sunday. Bands of precipitation will wrap around the stalled low bringing periods of rain and snow to Idaho, Washington, and Montana. Our neighbors to the east will experience the worst that this storm has to bring with portions of northwest and north central Montana experiencing blizzard conditions over the weekend. Snow levels in Washington state will be around 4,000 feet. The Inland Northwest will be impacted as well with biting north winds, much below average temperatures, and early snow accumulations in the mountains.
The forecast for Saturday is calling for much cooler temperatures with highs only in the lower 50’s and a 70% chance of rain with precipitation amounts around a quarter to a half inch.
Even colder on Sunday with rain likely before noon and afternoon high temperatures only in the mid 40’s with overnight lows in the mid to upper 30’s.
It is tough to think about wind chills in September, but if you plan to be outside Saturday night or Sunday morning dig out your coat, gloves and hat. Wind chill values in the 20s will be common in Central and Eastern Washington.
Not much change in our weather forecast on Monday right through Wednesday except it will be drier with mostly sunny skies, afternoon high temperatures in the lower to mid-50’s, overnight lows in the upper 30’s to lower 40’s.