The National Weather Service in Billings has issued a winter storm warning for heavy snow from noon Thursday to 3 p.m. on Friday.
Rain and snow showers Thursday morning are expected to become more widespread and change to snow by this afternoon. Snow, which will be heavy at times, will continue overnight and early Friday, then decrease Friday afternoon.
Driving conditions could become difficult along Interstate 90 and Highway 89, the weather service said. Heavy wet snow also may cause falling power lines and endanger young livestock.
A winter storm warning means a significant amount of snow is expected or occurring. Strong winds also are possible.
The high temperature for Billings will be about 44 degrees Thursday with a low of 29 degrees. Friday's high is forecast to be 37 degrees while the low will be about 27 degrees.