According to the National Weather Service in Cheyenne, a strong cold front is expected to bring colder temperatures and scattered rain and snow showers to the region by week's end.
Several cities in southeast Wyoming and the Nebraska Panhandle could see near to record-high temperatures today, the National Weather Service in Cheyenne says.
A crash involving hazardous materials has forced the closure of Interstate 80 between Rawlins and Laramie, the Wyoming Department of Transportation says.