The light snow we saw across Southwest Idaho Tuesday was just a precursor to the bigger system that arrives early Wednesday morning. On average, the Treasure Valley will see about 1-4” of snow depending on elevation. The mountains will see about 5-10” of snow. Most of the snow will fall prior to the morning commute which will likely generate slick roads as people start moving around the valley in the early hours. Look for a scattering of showers in the afternoon Wednesday. This is only the first of a series of storms poised to move into the region.
We’ll see drier conditions Thursday and Friday. But, the models are already indicating that another fast moving snow storm will move into the area Saturday. It’s still too early to tell how snow we could get out of this storm. With the cold air already in place, chances are any snow that does fall will stick to the roads. Plus, we could also see occasional snow showers on Sunday and Monday.
Why is the pattern so active all of a sudden? A large high pressure has centered itself over the Pacific Ocean. The clockwise circulation of air around that high is pushing the storm track into the Gulf of Alaska and then down into the northwest part of the country which includes Idaho. As long as the high is in place, the Jet Stream will usher in one storm after another and pump in lots of cold air from Canada. The models indicate this will likely be the case for the next 7-10 days! Let’s just say winter is off to a late start! We’ll be watching.