The agency issued the following statement late Monday morning: weather.gov/cys 10/1140AM: Greetings! For those traveling on I-80 near/west of Cheyenne, be prepared for moderate to heavy snow this afternoon. The visibility will drop below one quarter of a mile at times. Be aware for sudden drops in visibility this afternoon and allow extra distance between you and the vehicle in front of you. Get our free mobile app Winter Storm Warnings and Winter Weather Advisories remain in effect until noon Tuesday for much of the area. URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 144 PM MDT Mon May 10 2021