Another round of prolonged rain is expected to drench much of Northwest Montana as the region recovers from floods that destroyed multiple bridges in Lincoln County last week.

The atmospheric river will once again target the Pacific Northwest with heavy precipitation beginning Monday through Wednesday, the National Weather Service in Missoula warned.

Four-day totals ending Friday morning will be 1 to 2 inches of liquid for Libby and Troy, with 3 to 4 inches in the Cabinet Mountains and higher terrain along the Idaho-Montana border.

The heaviest rain will fall Tuesday and Tuesday night.

"Due to already saturated ground, particularly in Northwest Montana, this rainfall increases the risk of rock and landslides, stream and river rises, and minor flooding," the Weather Service warned.

Heavy precipitation is also on tap for the Clearwater, Swan, Mission and Flathead ranges, which could see 1.5 to 3 inches of liquid. 

Snow levels will top out at around 7,000 feet before crashing to the valley floor by Thursday.

The Fisher River near Libby dropped to 5.7 feet on Saturday after cresting above flood stage Dec. 11 at 7.67 feet. The river was projected to crest again Wednesday, Dec. 17 at 6.79 feet, just below minor flood stage.

The Yaak River near Troy was at 6.12 feet Saturday after topping out Dec. 11 at above flood stage at 8.3 feet. The river was projected to crest again Wednesday, Dec. 17 at 6.4 feet.