The same storm that brought snow to the mountains in California this past week will blanket portions of Wyoming, Colorado and South Dakota with up to 2 feet of snow this weekend.
The storm is producing plenty of cold air to deliver heavy snow or cause rain to change to snow this Mother's Day weekend.
Temperatures during the storm will average 20-30 degrees below normal with lows in the 20s and highs in the 30s.
Snow will fall from Denver to Cheyenne and Casper, Wyoming, eastward to Rapid City, South Dakota, this weekend.
Portions of I-25 and I-70 in Colorado, I-25, I-80 and I-90 in Wyoming and I-90 in western South Dakota will become slushy with poor visibility. Motorists traveling through these areas should expect significant delays with possible closures in higher elevations, where the snow is likely to stick to roads.
While only a few inches of snow will fall on grassy surfaces in the Denver metro area, the snow will ramp up westward into the foothills and Colorado Rockies, as well as northward into the mountains and plains of Wyoming and the Black Hills of western South Dakota.
A whopping 1-2 feet of snow will fall with locally higher amounts on some non-paved areas into Sunday evening.
The wet, clinging nature of the snow has the potential to bring down trees and power lines.
In Colorado, including the Denver area, this will be the second snowy Mother's Day weekend in a row. A storm spanning May 11-12, 2014, brought several inches of snow to the Denver area with 10-30 inches in parts of the foothills and mountains.
The storm this weekend is likely to be the biggest of the snow season in Rapid City and push the city well above average. Prior to this storm, about 36 inches of snow has fallen on Rapid City. Typical seasonal snowfall is about 40 inches.
In addition to bringing heavy snow to parts of the Rockies and High Plains, severe thunderstorms and tornadoes will threaten lives and property farther to the south and east. The storm produced tornadoes and large hail in eastern Colorado Saturday afternoon.
Utilize AccuWeather MinuteCast® for your location to get an exact start time on the rain, snow and storms that may impact your plans.