The first colder storm that tracked through Thursday and Friday has blanketed the region with snow. Here's an analysis of snow on the ground.
This is just the beginning of the snow. A storm Saturday night and Sunday will bring light to moderate accumulations. Here is our forecast as of Friday afternoon for Saturday night and Sunday.
A stronger storm is on tap for Monday. Here is what one of the forecast models is showing.
|Dec 18th/18z GFS model run valid 10 am Monday showing 500mb height and 700-500mb Relative Humidity|
This one could bring moderate to heavy snow amounts for most of the area. Exception could be around Moses Lake, and Lewiston areas where milder air coming up from the south may limit accumulations as rain may mix in with the snow.
The snow that falls is expected to hang around a while as a cooler northwest flow sets up for the middle to end of next week. Models are showing an upper ridge building in the Gulf of Alaska with a cool trough over the region. This could bring cool weather and snow showers to the region especially in the mountains. Here is what one of the model forecasts look like for Christmas Eve.
|Dec 18th/18z GFS model run valid 10 am Christmas Eve showing 500mb height and 700-500mb Relative Humidity|
So, after a mild and wet start to December, it looks like the month will finish colder and snowy with a White Christmas for most.