DENVER - A powerful spring storm dropped more than a foot of sloppy, wet snow in parts of Colorado and Wyoming on Mother's Day, and forecasters warned that instability ahead of the cold front created conditions ripe for tornadoes and severe thunderstorms in the Plains states.
The National Weather Service issued a winter storm warning for most of northern Colorado and parts of southern Wyoming for all of Sunday and for Monday morning. The storm also created high winds across the West.
Weather service meteorologist Kyle Fredin in Boulder says the weather pattern is typical for this time of year.
Department of Transportation officials say plunging temperatures and heavy, wet snow created icy conditions and forced several closures along Interstate 70 west of Denver on Sunday afternoon. Multiple accidents were reported on the mountain corridor, frustrating skiers and snowboarders eager to get a few more runs in before the season ends. Authorities also closed parts of Interstate 25 because of several accidents Sunday afternoon.
Southwest of Denver, a seven-car pileup Sunday evening injured a sheriff's deputy on U.S. 285 near the community of Doubleheader. Three others were hurt, but their injuries didn't appear to be life-threatening.
Snow amounts could vary greatly, but up to 15 inches could fall at higher elevations and 4 to 9 inches could fall at lower elevations, including Denver and other cities along Colorado's Front Range.