National Weather Service

If you must travel, it's highly recommended to keep an extra flashlight, food and water in your vehicle in case of an emergency.

Over four inches of snow is expected for some areas.

Even after a winter storm dropped over a foot of snow in parts of Wyoming, all of the state remains in a drought.

Use caution if traveling, especially if driving light/high profile vehicles or towing a trailer.

It's a good day to stay off the roads as much as possible.

The Wyoming Department of Transportation has begun closing roads in mountainous areas of Wyoming as a winter storm moves through the area.

The agency said up to 18 inches of snow is possible in mountain areas between Monday night and Wednesday.

According to the weather service, ''the drought continues to worsen for southeast Wyoming and the Nebraska Panhandle.''

The area covered by the watch includes Laramie, where the temperature is expected to plunge to 29 degrees.

The weather service passes along the alerts on behalf of the Wyoming Department of Environmental Quality.