Snow amounts from Sunday through Tuesday morning ranged from 13-18″ in the Tetons, continuing what has been an active start to 2020. Following a short break Tuesday night, another storm system will arrive Wednesday morning, bringing more snow to the Tetons through Thursday night.
The National Weather Service in Riverton has issued a Winter Weather Advisory for all of Teton County from 5 am Wednesday until noon Thursday. However, snow is likely to persist through Thursday afternoon and Thursday night as well.
The main jet stream energy with this upcoming storm will be tracking south of the area, but a prolonged period west/southwest winds transporting Pacific moisture into Western Wyoming will cause heavy snow to fall as this moisture is forced to rise when it encounters the Tetons. Cold temperatures across the higher elevations will also lead to higher snow to liquid ratios and will result in a dry, powdery snowfall.
Snow will arrive Wednesday morning and continue off-and-on through Thursday night before tapering off by around daybreak Friday. Total snow amounts over this two-day period will range from 8-16″ in the Tetons and 2-6″ in the Jackson Hole Valley. Excellent skiing and riding conditions will continue on both Wednesday and Thursday.
Here is the Colorado Avalanche Center model’s projected snowfall across the Western U.S. through Friday morning.
For travelers, the highest impact times will be Wednesday evening, Thursday morning, and Thursday evening.
Temperatures in the Jackson Hole Valley will start out in the mid 20s Wednesday morning before rising into the low 30s Wednesday afternoon and falling into the upper teens Wednesday night. On Thursday, temperatures will be colder with highs in the mid 20s in the valley and lows Thursday night in the single digits.
Mountain temperatures at 9,000 feet will be trending colder throughout the event, starting out in the upper teens Wednesday morning before falling into the low teens Wednesday afternoon. On Thursday, mountain temperatures will only be in the single digits.
Mountain winds will be gusty on Wednesday from the west/southwest at 15-25 mph with gusts to 40 mph, before decreasing to westerly at 10-15 mph with gusts to 25 mph on Thursday. Valley winds will be out of the southwest at 10-20 mph with gusts to 30 mph on Wednesday, before decreasing to 5-15 mph on Thursday.
Conditions will start to dry out on Friday, but another storm is expected this weekend.
Be sure to check Buckrail’s Daily Snow and Weather Report (issued Monday-Friday mornings) for additional updates during this storm.
Alan Smith, Meteorologist
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