When looking at the sounding it looks like we have some freezing fog this morning at KGEG. Below 6920 m we can see that dew point and temperature are fairly close along with the PWAT being 7.62 mm of perceptible water there is a chance of seeing some precipitation today in the form of snow.
At Spokane Airport KGEG it looks like the most snowfall they have received by 10 am is the most they will get. There is a 60% chance of more snow until 4pm although only up to an inch of accumulation. Today we will see a high around 30 degrees Fahrenheit. Going into the overnight it will drop to 22 degrees Fahrenheit with a 50 % chance of another inch of possible snow accumulation. Throughout the coming week temperatures are going to continue to drop, Monday high near 26 degrees Fahrenheit and a low around 2 degrees Fahrenheit, with a 20 % chance of precipitation. Tuesday and Wednesday will be sunny with a high around 14 and a low around 2 degrees Fahrenheit.
As seen in the above figure, we can see that their is a stationary front North of Spokane. A high pressure system is currently overhead. Causing cold temperatures.
The jet stream is currently traveling east to west, with Spokane on the upper edge of the jet stream. This will why we are having cooler temperatures and the lower temperatures later in the week.