Avalanche Warning

MTZ001-221200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Backcountry Avalanche Warning
Flathead Avalanche Center Hungry Horse MT
Relayed by National Weather Service Missoula MT
624 AM MDT Sat Mar 21 2026

The following message is transmitted at the request of Flathead Avalanche
Center Hungry Horse MT.

...AVALANCHE WARNING ISSUED BY THE FLATHEAD AVALANCHE CENTER...

06:00 MDT Sat Mar 21 2026
The Flathead Avalanche Center in Hungry Horse has issued a BACKCOUNTRY
AVALANCHE WARNING for the following areas:

NWS Missoula MT -
MTZ001 (MTZ001)

* WHAT...Rain and warm temperatures have created very dangerous avalanche
conditions that will likely persist through  Saturday.

* WHERE...Slopes above 5,000 feet in the Flathead Ranges, and the Lake
McDonald and Marias Pass areas of Glacier National Park.

* WHEN...In effect from Sat 06:00 MDT to Sun 06:00 MDT.

* IMPACTS...Natural and human-triggered avalanches are likely. Wet
avalanches will entrain a dangerous amount of debris. Weak layers buried
several feet deep may fail, resulting in very large and destructive
avalanches.


* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche
conditions. Travel in avalanche terrain is not recommended. Avalanches may
run long distances and can run into mature forests, valley floors, or flat
terrain.

Consult http://www.flatheadavalanche.org/ or www.avalanche.org for more
detailed information.

Similar avalanche danger may exist at locations outside the coverage area of
this or any avalanche center.

$$

Flood Watch

Flood Watch
National Weather Service Missoula MT
458 PM MDT Fri Mar 20 2026

.An atmospheric river will bring moderate rain rates to the
mountains of northwest Montana tonight. This will fall on a deep
primed snowpack leading to the melt increasing. Flows in rivers and
streams may increase quickly and reach bankfull or exceed their
banks.

MTC053-221800-
/O.NEW.KMSO.FA.A.0003.260320T2258Z-260322T1800Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln-
458 PM MDT Fri Mar 20 2026

...FLOOD WATCH IN EFFECT THROUGH SUNDAY MORNING...

* WHAT...Flooding caused by rain and snowmelt is possible.

* WHERE...A portion of northwest Montana, including the following
  county, Lincoln.

* WHEN...Through Sunday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers,
  creeks, streams, and other low-lying and flood-prone locations.
  Creeks and streams may rise out of their banks. Flooding may occur
  in poor drainage and urban areas. Low-water crossings may be
  flooded. Rockfall is possible.

* ADDITIONAL DETAILS...
  - The atmospheric river will bring moderate rain rates between
    0.10 to 0.25 inches per hour to the Cabinet Mountains between
    9 PM Friday evening and 4 AM MDT Saturday. With conditions
    already primed, creeks could overflow their banks early
    Saturday morning. Landslides and rockfalls are possible on
    windward and leeward sides of the mountains. Ross Creek has
    swelled into nearby ditches and caused water to flow over
    Highway 56 south of Bull Lake.

    The Yaak River and Fisher River are forecast to reach action
    stage by Saturday night.
  - https://www.weather.gov/mso/hydrology

$$

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Riverton WY
1237 AM MDT Sat Mar 21 2026

WYZ001>020-022>030-221300-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
1237 AM MDT Sat Mar 21 2026

...Red Flag Warning in effect for much of central and southern
Wyoming through this evening...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

A combination of record high temperatures, humidity falling to around
10 percent and strong wind will bring elevated to critical fire
weather today. Concerns are higher on this day then the previous
three. Please see Red Flag Warning and forecasts for details.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...Elevated fire weather possible in southern Wyoming.

Tuesday and Wednesday...Elevated to critical fire weather
possible, with Wednesday looking more concerning at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

$$

Hydrologic Outlook

Hydrologic Outlook
MTC053-089-211800-

Hydrologic Outlook
National Weather Service Missoula MT
224 PM MDT Fri Mar 20 2026

...INCREASED FLOWS IN STREAMS, CREEKS AND RIVERS DUE TO RAIN AND WARM
TEMPERATURES ACCELERATING SNOW MELT...

Lincoln and Sanders Counties

The Yaak River near Troy, and Fisher River near Libby are forecast
to rise near flood stage this weekend. There are reports of creeks
rising over their banks, and additional runoff may contribute to
additional rises through the weekend. Cooler overnight temperatures
may help to decrease additional runoff.


$$