Winter and spring collided Sunday as parts of Colorado, Wyoming, Utah and Nebraska were blasted with up to 4 feet of snow while Oklahoma, Arkansas and Missouri braced for heavy rains, high winds, flooding and possible tornadoes.

Cheyenne, Wyoming, saw snow totals of 25.8 inches this weekend — smashing a previous 2-day record held since 1979, according to the National Weather Service. And more could be coming — the weather service warned some areas could see up to 50 inches of snow and wind gusts of up to 60 mph before the weather eased Monday.

Schools in Cheyenne and another city in Wyoming, Casper, are taking a snow day Monday, as are Denver Public Schools. Some government offices in those areas also will be closed Monday.

Wyoming Gov. Mark Gordon announced the closure of state facilities and state offices in Laramie County starting Monday, adding that Wyoming Legislature will not meet as well.