WWA Summary for All Issued by MSO

Winter Weather Advisory

URGENT - WINTER WEATHER MESSAGE
National Weather Service Billings MT
1237 AM MDT Sun May 31 2026

MTZ067-010600-
/O.CON.KBYZ.WW.Y.0020.000000T0000Z-260601T0600Z/
Absaroka/Beartooth Mountains-
1237 AM MDT Sun May 31 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR THE BEARTOOTH HIGHWAY...

* WHAT...Snow showers over for the Beartooth Highway. Total snow
  accumulation up to 1 inch above 9000 feet.

* WHERE...Absaroka/Beartooth Mountains.

* WHEN...Until midnight MDT tonight.

* IMPACTS...Travel on the Beartooth Highway will be impacted by
  wintry conditions, mainly at elevations above Vista Point.

* ADDITIONAL DETAILS...Those with recreation plans in the high
  country should be prepared for wintry conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. For the latest road
conditions, call 5 1 1.

&&

$$

Additional graphics for this hazard can be found at
http://www.weather.gov/billings

Arends

Flood Watch

Flood Watch
National Weather Service Great Falls MT
214 AM MDT Sun May 31 2026

MTZ301>303-307>309-312-316-010000-
/O.CON.KTFX.FA.A.0001.000000T0000Z-260602T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
East Glacier Park Region-Northern High Plains-Eastern Glacier,
Western Toole, and Central Pondera-Southern Rocky Mountain Front-
Southern High Plains-Eastern Pondera and Eastern Teton-Cascade
County below 5000ft-Gates of the Mountains-
Including the following locations: Dutton, Kiowa, Browning, East
Glacier Park, Cut Bank, Augusta, Shelby, Conrad, Fairfield, Heart
Butte, Choteau, South Browning, Black Eagle, Cascade, Wolf Creek,
North Browning, Kevin, East Glacier Park Village, Belt, Sunburst,
Great Falls, Valier, Power, Brady, and Fort Shaw
214 AM MDT Sun May 31 2026

...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON...

* WHAT...Flooding caused by excessive rainfall continues to be
  possible.

* WHERE...Portions of central and north central Montana, including
  the following areas, in central Montana, Gates of the Mountains.
  In north central Montana, Cascade County below 5000ft, East
  Glacier Park Region, Eastern Glacier, Western Toole, and Central
  Pondera, Eastern Pondera and Eastern Teton, Northern High Plains,
  Southern High Plains and Southern Rocky Mountain Front.

* WHEN...Through Monday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
  creeks, streams, and other low-lying and flood-prone locations.

* ADDITIONAL DETAILS...
  - Isolated areas of heavy rainfall could result in flooding.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.

&&

$$

Brusda

Flood Watch
National Weather Service Missoula MT
1202 PM MDT Sat May 30 2026

MTZ002-003-311815-
/O.CON.KMSO.FA.A.0004.260531T0000Z-260601T1800Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
West Glacier Region-Flathead/Mission Valleys-
1202 PM MDT Sat May 30 2026

...FLOOD WATCH REMAINS IN EFFECT FROM 6 PM MDT THIS EVENING THROUGH
MONDAY MORNING...

* WHAT...Flooding caused by rain and snowmelt continues to be
  possible.

* WHERE...A portion of northwest Montana, including the following
  areas, Flathead/Mission Valleys and West Glacier Region.

This includes the following Specific Areas...
Kalispell and Going-to-the-Sun Road in Glacier Park.

* WHEN...From 6 PM MDT this evening through Monday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers,
  creeks, streams, and other low-lying and flood-prone locations.
  Rockfall and debris flows are also possible in steep terrain.

* ADDITIONAL DETAILS...
  - Rainfall of 1 to 2 inches for valley locations with 2 to 4 inches
    in the terrain are possible late Saturday through Monday.
  - https://www.weather.gov/mso/hydrology

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.

&&

$$

Flood Watch
National Weather Service Missoula MT
1201 PM MDT Sat May 30 2026

...The Flood Watch continues for the following rivers in Montana...

  Flathead River At Columbia Falls affecting Flathead County.

For the Flathead River...including At Columbia Falls...flooding is
possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you are in the watch area, remain alert to possible flooding.

Residents and those with interests near the river should monitor
rising water levels and be prepared for possible Flood Warnings.

Additional information is available at www.weather.gov.

The next statement will be issued Sunday afternoon at 1215 PM MDT.

&&

MTC029-311815-
/O.CON.KMSO.FL.A.0006.000000T0000Z-260601T1200Z/
/CFMM8.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1201 PM MDT Sat May 30 2026

...FLOOD WATCH REMAINS IN EFFECT UNTIL MONDAY MORNING...

* WHAT...Flooding is possible.

* WHERE...Flathead River At Columbia Falls.

* WHEN...Until Monday morning.

* IMPACTS...At 13.0 feet, Farmers crops adjacent to the Flathead
  River are inundated with water. At 14.0 feet, Flooding of farmers
  crops adjacent to the Flathead River is likely. Sections of the
  Steel Bridge Road become inundated with water and impassable.

* ADDITIONAL DETAILS...
  - At 10:45 AM MDT Saturday the stage was 13.8 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 10:45 AM MDT Saturday was 13.8 feet.
  - Forecast...Flood stage may be reached based on the latest
    forecast information.
  - Flood stage is 14.0 feet. Forecast crest is 14.1 feet on Saturday
    afternoon.
  - https://www.weather.gov/mso/hydrology

&&

LAT...LON 4818 11414 4816 11412 4812 11411 4810 11408
      4804 11411 4805 11415 4813 11417 4811 11422
      4818 11430 4825 11426 4833 11425 4838 11421
      4840 11412 4847 11411 4845 11400 4837 11402
      4832 11416 4828 11418 4825 11418 4818 11423

$$

Flood Watch
National Weather Service Missoula MT
1200 PM MDT Sat May 30 2026

...The Flood Watch continues for the following rivers in Montana...

  Swan River Near Bigfork affecting Lake, Missoula and Flathead
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you are in the watch area, remain alert to possible flooding.

Residents and those with interests near the river should monitor
rising water levels and be prepared for possible Flood Warnings.

Additional information is available at www.weather.gov.

The next statement will be issued Sunday afternoon at noon MDT.

&&

MTC029-047-063-311800-
/O.CON.KMSO.FL.A.0005.260601T1625Z-260603T0500Z/
/SWRM8.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.NR/
1200 PM MDT Sat May 30 2026

...FLOOD WATCH REMAINS IN EFFECT FROM MONDAY MORNING TO TUESDAY
EVENING...

* WHAT...Flooding is possible.

* WHERE...Swan River Near Bigfork.

* WHEN...From Monday morning to Tuesday evening.

* IMPACTS...At 6.5 feet, Flooding affects low lying areas adjacent to
  the river. At 6.6 feet, Flooding affects low lying areas north of
  Lion Creek Road and adjacent to the river.

* ADDITIONAL DETAILS...
  - At 11:00 AM MDT Saturday the stage was 5.2 feet.
  - Forecast...Rises on the river are possible over the next few
    days. The river may reach flood stage.
  - Flood stage is 6.5 feet.
  - https://www.weather.gov/mso/hydrology

&&

LAT...LON 4810 11396 4797 11384 4791 11381 4780 11378
      4768 11376 4751 11365 4749 11375 4752 11378
      4771 11389 4774 11390 4781 11389 4787 11390
      4793 11392 4800 11400 4803 11402 4804 11407
      4805 11410 4809 11408

$$

Flood Watch
National Weather Service Missoula MT
1158 AM MDT Sat May 30 2026

...The Flood Watch continues for the following rivers in Montana...

  Clark Fork River Above Missoula affecting Missoula County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Residents and those with interests near the river should monitor
rising water levels and be prepared for possible Flood Warnings.


Additional information is available at www.weather.gov.

The next statement will be issued Sunday afternoon at noon MDT.

&&

MTC063-311800-
/O.CON.KMSO.FL.A.0004.260601T0251Z-260605T0700Z/
/ABOM8.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1158 AM MDT Sat May 30 2026

...FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY EVENING TO LATE THURSDAY
NIGHT...

* WHAT...Flooding is possible.

* WHERE...Clark Fork River Above Missoula.

* WHEN...From Sunday evening to late Thursday night.

* IMPACTS...At 7.5 feet, Flooding of low lying areas adjacent to the
  river is possible. Flood waters begin to flood streets in the
  Orchard Homes area, specifically the north end of Tower Street
  including Kehrwald Drive.


* ADDITIONAL DETAILS...
  - At 11:00 AM MDT Saturday the stage was 6.2 feet.
  - Forecast...Rises on the river are possible over the next few
    days. The river may reach flood stage.
  - Flood stage is 7.5 feet.
  - https://www.weather.gov/mso/hydrology

&&

LAT...LON 4690 11395 4691 11390 4690 11387 4684 11382
      4685 11391 4684 11403 4686 11413 4690 11410
      4691 11402

$$

Hydrologic Outlook

Hydrologic Outlook
MTC039-063-077-311945-

Hydrologic Outlook
National Weather Service Missoula MT
143 PM MDT Sat May 30 2026


 What: Widespread Moderate to Heavy Precipitation

 Where: West-Central Montana Counties: Missoula, Granite and Powell.

 Timing: Saturday May 30 through Monday June 1, 2026

 Relevant factors:
        Total precipitation amounts of 0.5 to 2 inches with locally
        higher amounts possible in higher terrain along the Divide.
        Ongoing snowmelt and recent precipitation has kept stream and
        river levels rising. Anticipate further rises in local
        waterways, rockfall and mudslide potential in steep terrain,
        as well as possible urban and low-land flooding.


$$