BOZEMAN – A deep trough of Low-pressure is sitting over the western US Monday pulling in colder Canadian air down into Montana. Temperatures are likely to remain cooler than normal for several more days.
The Polar jetstream is forcing storms to dive into California and roll over the SW US and lifting into the central plains. This will keep most of the wet weather south of Montana for a few days with one exception.
The far southern half of Beaverhead, Madison, Gallatin and Parks counties along with Yellowstone National Park and Island Park, ID will see increasing snow activity beginning Wednesday through the end of the week.
Moderate to heavy snow is possible from Monida Pass eastward through West Yellowstone over to the Cooke City area later this week.