Probabilistic Heavy Snow and Icing Discussion NWS Weather Prediction Center College Park MD 325 PM EDT Sun Oct 20 2024 Valid 00Z Mon Oct 21 2024 - 00Z Thu Oct 24 2024 ...Central Rockies... Day 1... An upper trough moving into the western U.S. will encourage the closed low over the Southwest eastward -- from the Four Corners to eastern Colorado overnight. Models have trended a little wetter and colder with the system -- pushing the probabilities for accumulating snow upward over the higher terrain of the west- central Colorado ranges. The probabilities for snow accumulations of 4 inches or more have shown notable increases, climbing above 50 percent, across portions of the Elk and Sawatch ranges, especially for areas above 10,000 ft. The probability of significant ice across the CONUS is less than 10 percent. Pereira