The National Weather Service said that heavy snow was expected in Montana, near Pryor and along the northern Bighorn Mountains.

Michigan thunderstorms can cause widespread damage. What you should know about watches, warnings and when to take cover.

Travelers in parts of Montana, Idaho and Wyoming have been warned about dangerous road conditions as a storm system is forecast to bring up to two feet of snow.

Some meteorologists say they were unable to accurately forecast an ice storm that hit Northern Michigan in March because National Weather Service balloon sites were cut or reduced.