Montana, 2026

Flooding in Montana, June 29 to 30, 2026

June 29 to 30, 2026 · NWS MSO · 2 events in 2 counties and zones

Wraparound precipitation from a closed low pressure system located east of the Continental Divide sent abundant moisture into the Northern Rockies. Saturated ground conditions from previous rainfall combined with an additional two to four inches of precipitation, resulting in flooding across parts of northwest Montana.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS MSO wrote it up.

Wraparound precipitation from a closed low pressure system located east of the Continental Divide sent abundant moisture into the Northern Rockies. Saturated ground conditions from previous rainfall combined with an additional two to four inches of precipitation, resulting in flooding across parts of northwest Montana.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 flood. Local standard time, as filed.

Flood, Flathead

When
June 29, 6:17 AM MST to 9:45 AM MST
Where
Flathead County, 9.41 mi NNE of Polebridge Sonderson to 18.46 mi ENE of Polebridge Sonderson
Cause
Heavy Rain
Reported by
Park/Forest Service
Coordinates
48.983, -114.283

Glacier National Park Dispatch reported several flooding impacts west of the Continental Divide. Sprague Creek reached its banks, and water from Logan Creek began coming onto the road. Claudes Creek, located west of Claudes Corner, flooded the roadway, and water levels were close to overtopping the road at Claudes Corner itself. The Going to the Sun Road was closed at Avalanche Creek. Additionally, multiple temporary closures were reported across Glacier National Park due to flooding and debris on the roadways, particularly near the Loop and along McDonald Creek.

Flood, Lake

When
June 29, 6:17 AM MST to June 30, 9:45 AM MST
Where
Lake County, 12.45 mi SW of Big Arm to 11.69 mi WSW of Moiese
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
47.678, -114.497

The Lake County Emergency Manager reported that DeLaney and Old Freight roads were flooded. A bridge ramp on Rocky Butte Road sustained minor damage from the flooding, though it was easily repaired with gravel. Flooding impacts were also reported at a local business, Bev's Bloomers, with water flowing over nearby roads.

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Montana in 2026Every state in 2026This day in weather historyWarnings in Montana, June 2026

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 1348924, 1348927.