Use this page to view archived advisories. The table below shows the overall danger rating and the bottom line for the 20 most recent advisories. Click on the time and date link above each danger rating icon to view the full advisory for that day. Use the date chooser or the pager at the bottom to scroll through the older advisories.

E.g., Thursday, November 21, 2024
E.g., Thursday, November 21, 2024
E.g., Thursday, November 21, 2024
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2017-02-26
February 26, 2017 at 7:01

Fresh snowfall overnight, combined with wind and forecasted snow totals for today, has increased the avalanche hazard. The avalanche danger is CONSIDERABLE above 6000 feet where fresh storm and wind slabs should be expected. Below 6000 feet the avalanche danger is MODERATE but may rise depending on snowfall. Evaluate all terrain that has received wind loading or substantial new snow before committing to a slope. Dangerous avalanche conditions exist and conservative decision-making is essential today.

Whitefish Range
Click here to see the full advisory for 2017-02-25
February 25, 2017 at 6:48

Wind speeds increased overnight and will continue to increase throughout today. These winds will drift the snow that fell earlier this week onto typical leeward aspects. In some locations this snow will accumulate onto surface hoar which will increase the instability. The avalanche danger is MODERATE above 6000 feet where fresh thin wind slabs should be expected. Evaluate all wind loaded terrain before committing to it and practice safe back country travel techniques. Below 6000 feet the danger is LOW.

Swan Range
Click here to see the full advisory for 2017-02-25
February 25, 2017 at 6:48

Wind speeds increased overnight and will continue to increase throughout today. These winds will drift the snow that fell earlier this week onto typical leeward aspects. In some locations this snow will accumulate onto surface hoar which will increase the instability. The avalanche danger is MODERATE above 6000 feet where fresh thin wind slabs should be expected. Evaluate all wind loaded terrain before committing to it and practice safe back country travel techniques. Below 6000 feet the danger is LOW.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-25
February 25, 2017 at 6:48

Wind speeds increased overnight and will continue to increase throughout today. These winds will drift the snow that fell earlier this week onto typical leeward aspects. In some locations this snow will accumulate onto surface hoar which will increase the instability. The avalanche danger is MODERATE above 6000 feet where fresh thin wind slabs should be expected. Evaluate all wind loaded terrain before committing to it and practice safe back country travel techniques. Below 6000 feet the danger is LOW.

Whitefish Range
Click here to see the full advisory for 2017-02-24
February 24, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet due to lingering storm instabilities that exist at upper elevations. Carefully evaluate the terrain you intend to ski or ride before committing to any slope. Below 6000 feet the danger is LOW. Pay attention to isolated terrain that harbors unstable snow, and practice safe back country travel technique.

Swan Range
Click here to see the full advisory for 2017-02-24
February 24, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet due to lingering storm instabilities that exist at upper elevations. Carefully evaluate the terrain you intend to ski or ride before committing to any slope. Below 6000 feet the danger is LOW. Pay attention to isolated terrain that harbors unstable snow, and practice safe back country travel technique.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-24
February 24, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet due to lingering storm instabilities that exist at upper elevations. Carefully evaluate the terrain you intend to ski or ride before committing to any slope. Below 6000 feet the danger is LOW. Pay attention to isolated terrain that harbors unstable snow, and practice safe back country travel technique.

Whitefish Range
Click here to see the full advisory for 2017-02-23
February 23, 2017 at 7:00

Storm slabs that formed during the abundant snow-fall early in the week sit on a thick, smooth crust that can prolong the time it takes them to settle and strengthen.  The avalanche danger is MODERATE above 6000 feet where human triggered avalanches are possible. Below 6000 feet the danger is LOW. Remember that LOW danger does not mean NO danger. Continue to practice safe back country travel technique and look for the isolated areas with unstable snow.

Swan Range
Click here to see the full advisory for 2017-02-23
February 23, 2017 at 7:00

Storm slabs that formed during the abundant snow-fall early in the week sit on a thick, smooth crust that can prolong the time it takes them to settle and strengthen.  The avalanche danger is MODERATE above 6000 feet where human triggered avalanches are possible. Below 6000 feet the danger is LOW. Remember that LOW danger does not mean NO danger. Continue to practice safe back country travel technique and look for the isolated areas with unstable snow.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-23
February 23, 2017 at 7:00

Storm slabs that formed during the abundant snow-fall early in the week sit on a thick, smooth crust that can prolong the time it takes them to settle and strengthen.  The avalanche danger is MODERATE above 6000 feet where human triggered avalanches are possible. Below 6000 feet the danger is LOW. Remember that LOW danger does not mean NO danger. Continue to practice safe back country travel technique and look for the isolated areas with unstable snow.

Whitefish Range
Click here to see the full advisory for 2017-02-22
February 22, 2017 at 7:00

Heavy snow fall formed thin, reactive storm slabs late yesterday. Continued snow in the southern ranges this morning will thicken these slabs. The new storm snow will need a bit of time to settle and strengthen. The avalanche danger is CONSIDERABLE above 6000 feet. Human triggered avalanches are likely. Watch for obvious signs of instability like cracking and collapsing. The danger is MODERATE at mid elevations and LOW below 5000 feet.  See advisory for Whitefish Range Here.

Swan Range
Click here to see the full advisory for 2017-02-22
February 22, 2017 at 7:00

Heavy snow fall formed thin, reactive storm slabs late yesterday. Continued snow in the southern ranges this morning will thicken these slabs. The new storm snow will need a bit of time to settle and strengthen. The avalanche danger is CONSIDERABLE above 6000 feet. Human triggered avalanches are likely. Watch for obvious signs of instability like cracking and collapsing. The danger is MODERATE at mid elevations and LOW below 5000 feet.  See advisory for Whitefish Range Here.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-22
February 22, 2017 at 6:41

Heavy snow fall formed thin, reactive storm slabs late yesterday. These slabs will need a bit of time to settle and strengthen. The avalanche danger is MODERATE above 5000 feet where it remains possible to trigger recent storm slabs. Watch for obvious signs of instability like cracking and collapsing. Below 5000 feet the danger is LOW.  See advisory for other ranges here.

Whitefish Range
Click here to see the full advisory for 2017-02-21
February 21, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and winds formed fresh wind slabs at upper elevations. Additional snow and winds are in the forecast today. Evaluate all wind loaded terrain before committing to a slope. The danger is LOW below 6000 feet. LOW danger does not mean NO danger. Continue to use normal caution and look for signs of unstable snow such as recent avalanche activity.  

Swan Range
Click here to see the full advisory for 2017-02-21
February 21, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and winds formed fresh wind slabs at upper elevations. Additional snow and winds are in the forecast today. Evaluate all wind loaded terrain before committing to a slope. The danger is LOW below 6000 feet. LOW danger does not mean NO danger. Continue to use normal caution and look for signs of unstable snow such as recent avalanche activity.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-21
February 21, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and winds formed fresh wind slabs at upper elevations. Additional snow and winds are in the forecast today. Evaluate all wind loaded terrain before committing to a slope. The danger is LOW below 6000 feet. LOW danger does not mean NO danger. Continue to use normal caution and look for signs of unstable snow such as recent avalanche activity.  

Whitefish Range
Click here to see the full advisory for 2017-02-20
February 20, 2017 at 6:55

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and wind formed fresh wind slabs at upper elevations. Lingering storm slab instability should be expected in areas favored by our last storm. In some locations both wind and storm slabs formed on a crust adding to their instability. Evaluate all wind loaded terrain, along with areas that received more recent snowfall, before committing to a slope. The danger below 6000 feet is LOW.

Swan Range
Click here to see the full advisory for 2017-02-20
February 20, 2017 at 6:55

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and wind formed fresh wind slabs at upper elevations. Lingering storm slab instability should be expected in areas favored by our last storm. In some locations both wind and storm slabs formed on a crust adding to their instability. Evaluate all wind loaded terrain, along with areas that received more recent snowfall, before committing to a slope. The danger below 6000 feet is LOW.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-20
February 20, 2017 at 6:55

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and wind formed fresh wind slabs at upper elevations. Lingering storm slab instability should be expected in areas favored by our last storm. In some locations both wind and storm slabs formed on a crust adding to their instability. Evaluate all wind loaded terrain, along with areas that received more recent snowfall, before committing to a slope. The danger below 6000 feet is LOW.

Whitefish Range
Click here to see the full advisory for 2017-02-19
February 19, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. New snow overnight, combined with wind, has formed fresh wind slabs and added weight to existing slabs. In areas of favored snowfall storm slabs should be expected. In some locations these slabs are being deposited onto a crust. Below 5000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Swan Range
Click here to see the full advisory for 2017-02-19
February 19, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. New snow overnight, combined with wind, has formed fresh wind slabs and added weight to existing slabs. In areas of favored snowfall storm slabs should be expected. In some locations these slabs are being deposited onto a crust. Below 5000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-19
February 19, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. New snow overnight, combined with wind, has formed fresh wind slabs and added weight to existing slabs. In areas of favored snowfall storm slabs should be expected. In some locations these slabs are being deposited onto a crust. Below 5000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Whitefish Range
Click here to see the full advisory for 2017-02-18
February 18, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. Recent snow and wind has formed fresh wind slabs on leeward aspects at upper elevation locations, particularly in the alpine terrain.  Below 6000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Swan Range
Click here to see the full advisory for 2017-02-18
February 18, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. Recent snow and wind has formed fresh wind slabs on leeward aspects at upper elevation locations, particularly in the alpine terrain.  Below 6000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-18
February 18, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. Recent snow and wind has formed fresh wind slabs on leeward aspects at upper elevation locations, particularly in the alpine terrain.  Below 6000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Whitefish Range
Click here to see the full advisory for 2017-02-17
February 17, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Temperatures have dropped below freezing above 6000 feet and 3-7 inches of snow overnight combined with west-southwest winds have likely formed fresh wind slabs. Below 6000 feet, wet loose avalanches remain possible thanks to the rain and above-freezing temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Swan Range
Click here to see the full advisory for 2017-02-17
February 17, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Temperatures have dropped below freezing above 6000 feet and 3-7 inches of snow overnight combined with west-southwest winds have likely formed fresh wind slabs. Below 6000 feet, wet loose avalanches remain possible thanks to the rain and above-freezing temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-02-17
February 17, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Temperatures have dropped below freezing above 6000 feet and 3-7 inches of snow overnight combined with west-southwest winds have likely formed fresh wind slabs. Below 6000 feet, wet loose avalanches remain possible thanks to the rain and above-freezing temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Whitefish Range
Click here to see the full advisory for 2017-02-16
February 16, 2017 at 7:00

The avalanche danger is CONSIDERABLE above 6000 feet and MODERATE below this. Tropical moisture in the form of rain has entered the area.  The snow surface is already saturated in places due to 48 hours of above freezing temperatures at mid- and upper elevations.  The strong rain crust is breaking down in places and it is possible to have wet loose avalanches or trigger an avalanche on an older persistent weak layer or wind loaded slope. 

 

Whitefish Range
Click here to see the full advisory for 2017-02-16
February 16, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Tropical moisture in the form of rain has entered the area.  The snow surface is already saturated in places due to 48 hours of above freezing temperatures at mid and upper elevations.  The strong rain crust is breaking down in places and it is possible to have wet loose avalanches or trigger an avalanche on an older persistent weak layer or wind loaded slope. 

 

Flathead Range and Glacier National Park

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