Cheyenne, Wyoming – A more active storm track building across the Northern Rockies ahead of St. Patrick’s Day could bring accumulating mountain snow and periods of rain or wet snow to parts of Wyoming between March 11 and March 17.
According to the National Weather Service Climate Prediction Center, much of Wyoming falls within a 40-50% probability zone for above-normal precipitation during the 8-14 day period. Temperatures are projected to trend near seasonal averages statewide, meaning elevation and time of day will determine whether precipitation falls as rain or snow.
In Cheyenne and along the Interstate 25 corridor, daytime highs in the upper 30s and 40s may support rain at times, with wet snow mixing in overnight as temperatures dip toward freezing. Along Interstate 80 from Laramie through Rawlins, bursts of heavier precipitation could briefly reduce visibility and create slick travel, especially during pre-dawn hours. Higher elevations, including the Snowy Range and areas near South Pass, are more likely to see steady accumulating snow with each passing system.
Travelers crossing mountain passes should prepare for winter driving conditions at times, particularly overnight. Even brief temperature drops can change road conditions quickly. Additional updates are expected as the March 11-17 window approaches and storm timing becomes clearer.
