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., Wednesday, January 17, 2018
E.g., Wednesday, January 17, 2018
E.g., Wednesday, January 17, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2018-01-06
January 6, 2018 at 6:59

The current warming and changing conditions may stress areas where our snowpack structure remains weak and a human triggered slide could result in a very large destructive avalanche.  The surface slab is consolidating with these warm conditions and it is imperative to recognize obvious signs of instability such as cracking and collapsing beneath your feet or machine while practicing safe travel techniques such as one member of the party on a slope at a time. 

Whitefish Range
Click here to see the full advisory for 2018-01-06
January 6, 2018 at 6:59

The current warming and changing conditions may stress areas where our snowpack structure remains weak and a human triggered slide could result in a very large destructive avalanche.  The surface slab is consolidating with these warm conditions and it is imperative to recognize obvious signs of instability such as cracking and collapsing beneath your feet or machine while practicing safe travel techniques such as one member of the party on a slope at a time. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-06
January 6, 2018 at 6:59

Warm moist new snow, accompanied by wind, returned overnight and will develop thin storm slabs as the day progresses. The current warming changing conditions may stress areas where our snowpack structure remains weak and a human triggered slide could result in a very large destructive avalanche.  The surface slab is consolidating with these warm conditions and it is imperative to recognize obvious signs of instability such as cracking and collapsing beneath your feet.

Swan Range
Click here to see the full advisory for 2018-01-05
January 5, 2018 at 6:58

Nearly a week without substantial new snow has resulted in avalanches becoming more difficult to trigger.  However, a poor snowpack structure remains in locations where a human triggered slide could result in a very large destructive avalanche. Continue to recognize obvious signs of instability such as cracking and collapsing beneath your feet or machine while practicing safe travel techniques such as one member of the party on a slope at a time. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-05
January 5, 2018 at 6:58

Nearly a week without substantial new snow has resulted in avalanches becoming more difficult to trigger.  However, a poor snowpack structure remains in locations where a human triggered slide could result in a very large destructive avalanche. Continue to recognize obvious signs of instability such as cracking and collapsing beneath your feet or machine while practicing safe travel techniques such as one member of the party on a slope at a time. 

Whitefish Range
Click here to see the full advisory for 2018-01-05
January 5, 2018 at 6:58

Nearly a week without substantial new snow has resulted in avalanches becoming more difficult to trigger.  However, a poor snowpack structure remains in locations where a human triggered slide could result in a very large destructive avalanche. Continue to recognize obvious signs of instability such as cracking and collapsing beneath your feet or machine while practicing safe travel techniques such as one member of the party on a slope at a time.

Swan Range
Click here to see the full advisory for 2018-01-04
January 4, 2018 at 6:52

The avalanche danger continues to trend down following a significant storm and avalanche cycle that ended over the holiday weekend.  Stay alert for obvious signs of instability like shooting cracks or collapses.  Although avalanches are becoming harder to trigger, the resulting size could be very destructive.  

Swan Range
Click here to see the full advisory for 2018-01-04
January 4, 2018 at 6:47

We have seen a string of human triggered persistent slabs, shooting cracks, and audible collapses since last weekend's storm and avalanche cycle ended. Although the danger is gradually easing, the potential for triggering a large and dangerous persistent slab avalanche requires careful snowpack and terrain evaluation. 

Whitefish Range
Click here to see the full advisory for 2018-01-04
January 4, 2018 at 6:47

We have seen a string of human triggered persistent slabs, shooting cracks, and audible collapses since last weekend's storm and avalanche cycle ended. Although the danger is gradually easing, the potential for triggering a large and dangerous persistent slab avalanche requires careful snowpack and terrain evaluation. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-03
January 3, 2018 at 7:10

The avalanche danger continues to trend down following a significant storm and avalanche cycle that ended over the holiday weekend.  Stay alert for obvious signs of instability like shooting cracks or collapses.  Although avalanches are becoming harder to trigger, the resulting size could be very destructive.  

Swan Range
Click here to see the full advisory for 2018-01-03
January 3, 2018 at 7:07

Heightened avalanche conditions exist due to reactive persistent slab instabilities and fresh wind loading following last weekend's storm.  Recent reports of collapses in the Flathead Range highlight the potential for triggering a large and dangerous avalanche.  Carefully assess the snowpack before committing to steeper terrain.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-03
January 3, 2018 at 6:56

Dangerous avalanche conditions exist due to reactive persistent slab instabilities following last weekend's storm.  Numerous persistent slab avalanches were triggered Monday in the Whitefish Range, including a partial burial.  Look for shooting cracks or collapses to help identify instabilities, and use conservative terrain choices.  

Whitefish Range
Click here to see the full advisory for 2018-01-02
January 2, 2018 at 0:11

Heightened avalanche conditions exist in the Swan Range in the wake of a significant storm that ended last weekend.  Triggering a large and dangerous avalanche is possible on slopes steeper than 35 degrees.  Look for shooting cracks to help identify instabilities, and continue to carefully evaluate the snow and terrain.  

Swan Range
Click here to see the full advisory for 2018-01-02
January 2, 2018 at 6:54

Dangerous avalanche conditions exist in the wake of a significant storm that ended last weekend.  Numerous large and dangerous persistent slab avalanches were triggered yesterday in the Whitefish Range, including a partial burial.  Look for shooting cracks or collapses to help identify instabilities, and use conservative terrain choices to manage deeper instabilities.  

Whitefish Range
Click here to see the full advisory for 2018-01-02
January 2, 2018 at 6:39

Dangerous avalanche conditions exist in the Flathead Range in the wake of a significant storm that ended last weekend.  The avalanche danger is CONSIDERABLE above 6,000 feet.  Increased winds overnight formed sensitive wind slabs and the potential of triggering a destructive persistent slab lingers.  Avoid wind loaded slopes and use conservative terrain selection to manage deeper instabilities.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-02
January 2, 2018 at 6:22

Heightened avalanche conditions exist in the Swan Range in the wake of a significant storm that ended last weekend.  Triggering a large and dangerous avalanche is possible on slopes steeper than 35 degrees.  Look for shooting cracks to help identify instabilities, and continue to carefully evaluate the snow and terrain.  

Swan Range
Click here to see the full advisory for 2018-01-01
January 1, 2018 at 6:54

Recent dry weather has allowed our snowpack to gain strength, however our avalanche danger remains elevated. The avalanche danger is CONSIDERABLE on all aspects above 6000'. Triggering a storm slab or persistent slab avalanche remains POSSIBLE at all elevations. Persistent slab avalanches have the potential to be very large and destructive. Careful snowpack evaluation, cautious routefinding and conservative decision making are essential.

Whitefish Range
Click here to see the full advisory for 2018-01-01
January 1, 2018 at 6:54

Recent dry weather has allowed our snowpack to gain strength, however our avalanche danger remains elevated. The avalanche danger is CONSIDERABLE on all aspects above 6000'. Triggering a storm slab or persistent slab avalanche remains POSSIBLE at all elevations. Persistent slab avalanches have the potential to be very large and destructive. Careful snowpack evaluation, cautious routefinding and conservative decision making are essential.

Swan Range
Click here to see the full advisory for 2018-01-01
January 1, 2018 at 6:54

Recent dry weather has allowed our snowpack to gain strength, however our avalanche danger remains elevated. The avalanche danger is CONSIDERABLE on all aspects above 6000'. Triggering a storm slab or persistent slab avalanche remains POSSIBLE at all elevations. Persistent slab avalanches have the potential to be very large and destructive. Careful snowpack evaluation, cautious routefinding and conservative decision making are essential.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-31
December 31, 2017 at 6:57

The recent bountiful storm is over but dangerous avalanche conditions remain. The avalanche danger is CONSIDERABLE on all aspects and elevations. The natural avalanche cycle has ended but triggering a storm slab avalanche is LIKELY today. Persistent slab avalanches have the potential to be very large and destructive. Cautious routefinding and conservative decision making are essential.

Whitefish Range
Click here to see the full advisory for 2017-12-31
December 31, 2017 at 6:57

The recent bountiful storm is over but dangerous avalanche conditions remain. The avalanche danger is CONSIDERABLE on all aspects and elevations. The natural avalanche cycle has ended but triggering a storm slab avalanche is LIKELY today. Persistent slab avalanches have the potential to be very large and destructive. Cautious routefinding and conservative decision making are essential.

Swan Range
Click here to see the full advisory for 2017-12-31
December 31, 2017 at 6:57

The recent bountiful storm is over but dangerous avalanche conditions remain. The avalanche danger is CONSIDERABLE on all aspects and elevations. The natural avalanche cycle has ended but triggering a storm slab avalanche is LIKELY today. Persistent slab avalanches have the potential to be very large and destructive. Cautious routefinding and conservative decision making are essential.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-30
December 30, 2017 at 6:58

Continued snowfall, accompanied by shifting winds, has created dangerous avalanche conditions. The avalanche danger is CONSIDERABLE on all aspects and elevations. A natural avalanche cycle is ongoing and triggering a dangerous avalanche is LIKELY today. Persistent slab avalanches have the potential to be very large and destructive. Cautious routefinding and conservative decision making are essential today.

Whitefish Range
Click here to see the full advisory for 2017-12-30
December 30, 2017 at 6:55

An AVALANCHE WARNING remains in effect until 5 p.m.  Continued snowfall, accompanied by shifting winds, has created very dangerous avalanche conditions. The avalanche danger is HIGH on all aspects above 5000 feet. A natural avalanche cycle is ongoing and triggering a dangerous avalanche is VERY LIKELY today. Persistent slab avalanches have the potential to be  very large and destructive. Travel in avalanche terrain is not recommended.  

Swan Range
Click here to see the full advisory for 2017-12-30
December 30, 2017 at 6:55

An AVALANCHE WARNING remains in effect until 5 p.m.  Continued snowfall, accompanied by shifting winds, has created very dangerous avalanche conditions. The avalanche danger is HIGH on all aspects above 5000 feet. A natural avalanche cycle is ongoing and triggering a dangerous avalanche is VERY LIKELY today. Persistent slab avalanches have the potential to be  very large and destructive. Travel in avalanche terrain is not recommended.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-29
December 29, 2017 at 7:04

Heavy snowfall and gusty winds have teamed up to create dangerous avalanche conditions and the avalanche danger is CONSIDERABLE.  Storm instabilities will be easily triggered and could fail naturally, and very destructive persistent slab avalanches have potential to fail and run full track.   Today is a great day to default to conservative, low angle terrain to manage for storm slabs and lurking deeper instabilities.  Give yourself a wide buffer in decision making and route selection. 

Whitefish Range
Click here to see the full advisory for 2017-12-29
December 29, 2017 at 6:45

Heavy snowfall and gusty winds have teamed up to create very dangerous avalanche conditions and the avalanche danger is HIGH.  Large and dangerous storm instabilities will be easily triggered or fail naturally, and very destructive persistent slab avalanches have potential to run full track.  Travel in avalanche terrain is not recommended.  

Swan Range
Click here to see the full advisory for 2017-12-29
December 29, 2017 at 6:45

Heavy snowfall and gusty winds have teamed up to create very dangerous avalanche conditions and the avalanche danger is HIGH.  Large and dangerous storm instabilities will be easily triggered or fail naturally, and very destructive persistent slab avalanches have potential to run full track.  Travel in avalanche terrain is not recommended.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-28
December 28, 2017 at 7:18

Expect changing conditions with avalanche danger rising from MODERATE today and reaching  CONSIDERABLE overnight as a potent storm begins to impact the forecast area. Storm instabilities will develop through the day and will begin to add stress to a more consequential persistent slab problem.  Monitor new snow accumulations and intensity while allowing a wide buffer in terrain selection to manage for lurking deeper instabilities.

Whitefish Range
Click here to see the full advisory for 2017-12-28
December 28, 2017 at 6:45

Expect changing conditions with avalanche danger rising to CONSIDERABLE by this evening as a potent storm begins to impact the forecast area. Storm instabilities will develop through the day and will begin to add stress to a more consequential persistent slab problem.  Monitor new snow accumulations and intensity while allowing a wide buffer in terrain selection to manage for lurking deeper instabilities.

Swan Range

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