A late-season snow system is forecast to affect parts of the central Rocky Mountains, bringing significant accumulations and strong winds across several states. The conditions are expected to disrupt travel and pose risks to outdoor activities through early Tuesday. The warning, issued by the National Weather Service, highlights potentially dangerous conditions across regions of Wyoming, Colorado, and Montana. Authorities are urging residents to remain cautious as snowfall intensifies and road conditions deteriorate.
Snowfall Totals and Regional Impacts across Three States
Snowfall is expected to vary significantly depending on elevation and location, with the heaviest accumulations forecast in mountainous terrain. According to the National Weather Service, parts of southern Wyoming, including the Sierra Madre and Snowy Ranges, could receive between 6 and 10 inches of snow from Monday afternoon through Tuesday afternoon.
In north central and northeastern Wyoming, snowfall totals are expected to range between 5 and 10 inches by midday Monday. The same source indicates that light snow during the morning will likely transition into heavier showers later in the day, continuing into Tuesday.
Colorado is also expected to experience snowfall, particularly in higher elevations. Central areas could see up to 3 inches by Monday morning, while north central regions within the Central Rocky Mountains may receive up to 8 inches, accompanied by winds reaching 40 mph.
Further north, parts of south-central and south-eastern Montana are forecast to receive between 1 and 10 inches of snow. According to the National Weather Service,wind speeds in these areas could range from 30 to 35 mph, particularly across the Pryor and Bighorn mountain ranges and the southern Rosebud Mountains.
Travel Disruptions and Safety Guidance from Authorities
The developing conditions are expected to significantly impact transport routes, especially in elevated and exposed areas. According to theNational Weather Service, roads such as Highway 14 in the Bighorns, Interstate 90 between Lodge Grass and Sheridan, and US-212 over Lame Deer Divide are likely to be affected.
Additional routes, including Powder River and Granite Passes, as well as sections of Interstate 25 and Interstate 90 near Buffalo, may also become hazardous. In Colorado, several mountain passes, including Fremont Pass, are expected to experience difficult driving conditions due to snow and wind.
Officials have warned that bridges and overpasses may become particularly slippery, increasing the risk for motorists. The National Weather Service advises avoiding unnecessary travel during periods of heavy snowfall. For those who must travel, reducing speed, allowing extra time, and carrying emergency supplies such as blankets, food, water, and a charged phone are recommended precautions.
Residents are also advised to prepare for possible power outages. Heavy snow can weigh down tree branches and power lines, leading to service disruptions. Keeping essential supplies at home may reduce the need to travel under hazardous conditions.
Looking ahead, conditions are expected to improve later in the week. Wyoming and Montana are forecast to transition to warmer and drier weather, with rain replacing snow in parts of Montana. In Colorado, intermittent snowfall may continue, although accumulations are expected to remain relatively light before temperatures rise towards the weekend.
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