Cooler weather on the way
September 3, 2015
Cooler weather on the way Labor Day weekend with some snow possible in northwest Wyoming.
An area of low pressure will track across the intermountain west Saturday and Sunday. After a warm day on Saturday, cooler temperatures can be expected as this weather system swings a cold front across the state Saturday night. High temperatures Sunday will be about 10 degrees below normal, with 50s west of the Continental Divide and 60s elsewhere. Overnight lows may dip below freezing both Saturday night and Sunday night in the western valleys and basins.
This weather system will also generate an increasing chance of precipitation along and west of the continental divide beginning Saturday afternoon and continuing into the early morning hours Sunday. The timing of the precipitation Saturday night could lead to snow across northwest Wyoming, including much of Yellowstone National Park. Early indications are that snow could accumulate at Old Faithful, Lake, Canyon, and other populated areas in the park.
Conditions will be drier and slightly warmer for Labor Day. High temperatures Monday will generally range from 65 to 75. Any precipitation would be confined to far northwest Wyoming and the northern Bighorn Mountains, but chances look limited.