Areas of rain will impact outdoor plans today, but the more significant wet weather will arrive tonight into Tuesday. A few isolated rumbles of thunder are possible across southwest Montana, with the strong storms staying in the central and eastern Montana.

Today's highs will run a good 10 to 20 degrees below normal. Highs will be in the 50s to low 60s.

Temperatures and snow levels will drop enough tonight that 1 to 2 inches of slushy snow is possible around West Yellowstone, Lost Trail, Homestake, and the Macdonald Pass areas.

Tuesday will be very similar to Monday with scattered showers and high temperatures in the upper 50s and low 60s.

A WINTER STORM WATCH has been posted for the Rocky Mountain Front. The eastern slopes of the Rocky Mountains and the Glacier National Park area could see up to 20 inches of snow above 6500 feet.