An unusually strong trough is swinging across the Northwestern United States this weekend and will cause winter-like conditions for some areas.
NAM 500mb Vorticity
The northern Rockies will have the greatest impacts from this system; beginning tomorrow (Sunday) afternoon into Monday. The higher elevations (above 6,500 feet) of western Montana, northwestern Wyoming, and northern Idaho will see cold rain change to snow by Sunday evening.
NAM Simulated Radar (Monday Morning)
The snowfall forecast is tricky right now because the models are having issues with the track of the associated low-pressure system. It does appear locations as low as 6,000 feet may see a rain/snow mixture, with locations around 6,500 feet picking up 1-2″. Locations higher in elevation may see upwards of 4-8″ with higher amounts. It is likely that Glacier National Park will see a rain/snow mix, too, so if you have vacation plans, please dress accordingly.
NAM Snowfall Forecast Through Monday Night
Temperatures will be much below average. In the higher elevations, high temperatures will be in the 30’s. This is 20-30 degrees below average for this time of the year.
GFS Temperature Anomalies
For those of you dreaming of snow during this hot summer, keep in mind, it’ll be winter before you know it. Keep checking back for our 2016-17 Winter Forecast that will be released in a few weeks. We have been working and researching diligently to publish the most accurate winter forecast for you all.