Hydrologic Outlook issued June 18 at 3:55PM UTC by NWS Missoula MT

ESFMSO

Where: Flathead and Lincoln Counties in northwest Montana

What: Confidence is trending higher that a prolonged rain event will
produce 2 to 4 inches of rainfall in a 48hr period, starting Friday
evening and lasting into Sunday. The result will be the potential
for rock and debris slides along steep terrain in Glacier National
Park and Forest Service roads in the Flathead and Kootenai National
Forests. Low land ponding of water will be possible in poor drainage
areas.

Consider delaying backcountry travel this weekend, or plan
accordingly as conditions will be cold and wet, and moderate to
heavy snow is expected at elevations above 6000 feet. Check
weather.gov/Missoula for further updates and details in the coming
days.