National Weather Service officials say heavy rain has caused flooding in parts of Glacier and Pondera counties.
The weather service says nearly 5 inches of rain fell in parts of Glacier National Park over the last two days, while a record 1.23 inches fell in Cut Bank on Tuesday.
St. Mary River is above flood stage and Divide Creek is running over the park's Going-to-the-Sun Road. Debris flow temporarily closed state Highway 49 north of East Glacier.
More rain and heavy snow in higher elevations is expected to fall Wednesday and Thursday.
The weather service issued a winter storm warning for Marias Pass and along the northern Rocky Mountain Front.
A flood warning also has been issued over a broad swath from the mountains to east of Browning.