Building a Weather-Ready Nation
A strong weather system will push across the Northern Rockies Today (Monday) and tonight. This system will bring abundant moisture to areas along and west of the Continental Divide Today and continuing into tonight. A favorable westerly mountaintop wind direction will aid in snow production in the western mountains.
To the east of the Continental Divide, strong southwest wind will blow in central Wyoming
and possibly along the east slopes of the Wind River, Green, and Owl Creek mountains today.
Snowfall totals will generally range from 5 to 10 inches in the western valleys, including
Jackson Hole, Star Valley, and south Lincoln County...with 2 to 6 inches across the Upper Green
River Basin and Sweetwater County. The highest snowfall rates, 1/2" to 1" per
hour will occur from until early afternoon on Monday. The heaviest snow amounts will fall in Grand Teton
National Park and the north half of the Star Valley. Southwest wind of 20 to 30 with occasional gusts to
40 mph are possible in these valleys, creating significant blowing snow and limited visibility. Mountain
snowfall will top-out above 1 foot with the Teton Mountains receiving between 15 and 25 inches before
the snow winds down tonight. Click here for snowfall totals through early Monday morning.
As for the wind, southwest wind will increase in Natrona and eastern Fremont
counties this morning. The strongest wind will blow during the midday hours with
speeds of 30 to 40 mph and gusts aroudn 60 mph. This will impact travel on US Highway 287
from near Lander to Muddy Gap, and on Wyoming Highway 220 in Natrona County. The
potential also exists for gusty downslope winds along the east slope of the Wind River
Mountains around Lander, and the north slope of the Owl Creek Mountains around
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