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, April 26, 2018
E.g., Thursday, April 26, 2018
E.g., Thursday, April 26, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2018-01-22
January 22, 2018 at 6:54

Moderate to strong southwest winds increased overnight forming slabs on top of crusts and low density snow at upper elevations.  Continued windy conditions will thicken these slabs throughout the day. Several buried weak layers remain a concern and require evaluation before committing to consequential terrain. A human triggered avalanche remains possible and practicing safe travel techniques is recommended.

Swan Range
Click here to see the full advisory for 2018-01-22
January 22, 2018 at 6:51

Moderate to strong southwest winds increased overnight forming slabs on top of crusts and low density snow at upper elevations.  Continued windy conditions will thicken these slabs throughout the day. Several buried weak layers remain a concern and require evaluation before committing to consequential terrain. A human triggered avalanche remains possible and practicing safe travel techniques is recommended.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-22
January 22, 2018 at 6:51

Moderate to strong southwest winds increased overnight forming slabs on top of crusts and low density snow at upper elevations.  Continued windy conditions will thicken these slabs throughout the day. Several buried weak layers remain a concern and require evaluation before committing to consequential terrain. A human triggered avalanche remains possible and practicing safe travel techniques is recommended.

Whitefish Range
Click here to see the full advisory for 2018-01-21
January 21, 2018 at 6:57

Light to moderate southwest winds have formed thin wind slabs on top of crusts at upper elevations. Several buried weak layers remain a concern and require evaluation before committing to consequential terrain. A human triggered avalanche remains possible and exposing only one person on the slope at a time is imperative.

Swan Range
Click here to see the full advisory for 2018-01-21
January 21, 2018 at 6:56

Light to moderate southwest winds have formed thin wind slabs on top of crusts at upper elevations. Several buried weak layers remain a concern and require evaluation before committing to consequential terrain. A human triggered avalanche remains possible and exposing only one person on the slope at a time is imperative.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-21
January 21, 2018 at 6:56

Light to moderate southwest winds have formed thin wind slabs on top of crusts at upper elevations. Several buried weak layers remain a concern and require evaluation before committing to consequential terrain. A human triggered avalanche remains possible and exposing only one person on the slope at a time is imperative.

Whitefish Range
Click here to see the full advisory for 2018-01-20
January 20, 2018 at 6:58

New snow in the past 48 hours, combined with moderate southwesterly winds, have formed thin wind slabs at upper elevations which will thicken as the day progresses. A variety of weak layers exist in our pack which may be stressed by this new load or you and/or your machine. A human triggered avalanche is possible today and it is imperative to utilize safe travel techniques while evaluating snow and terrain carefully.

Swan Range
Click here to see the full advisory for 2018-01-20
January 20, 2018 at 6:57

New snow in the past 48 hours, combined with moderate southwesterly winds, have formed thin storm slabs at upper elevations. A variety of weak layers exist in our pack and may be stressed by this new load or you and/or your machine. A human triggered avalanche is possible today and it is imperative to utilize safe travel techniques while evaluating snow and terrain carefully.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-20
January 20, 2018 at 6:57

New snow in the past 48 hours, combined with moderate southwesterly winds, have formed thin storm slabs at upper elevations. A variety of weak layers exist in our pack and may be stressed by this new load or you and/or your machine. A human triggered avalanche is possible today and it is imperative to utilize safe travel techniques while evaluating snow and terrain carefully.

Whitefish Range
Click here to see the full advisory for 2018-01-19
January 19, 2018 at 7:28

Heightened avalanche conditions exist as snowfall continues to load buried weak layers that produced large and destructive avalanches earlier in the week. Natural or human triggered storm slabs will be likely on slopes steeper than 35 degrees at upper elevations. Diligent snowpack evaluation and cautious route-finding will be essential in managing our complex persistent slab problem, with generally safer conditions found at lower elevations.

Swan Range
Click here to see the full advisory for 2018-01-19
January 19, 2018 at 7:15

Dangerous avalanche conditions exist as snowfall continues to load buried weak layers that produced large and destructive avalanches earlier in the week. Natural or human triggered storm slabs will be most likely on slopes steeper than 35 degrees at upper elevations. Diligent snowpack evaluation and cautious route-finding will be essential in managing our complex snowpack, with generally safer conditions found at lower elevations.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-19
January 19, 2018 at 7:15

Dangerous avalanche conditions exist as snowfall continues to load buried weak layers that produced large and destructive avalanches earlier in the week. Natural or human triggered storm slabs will be most likely on slopes steeper than 35 degrees at upper elevations. Diligent snowpack evaluation and cautious route-finding will be essential in managing our complex snowpack, with generally safer conditions found at lower elevations.

Whitefish Range
Click here to see the full advisory for 2018-01-18
January 18, 2018 at 7:16

Warm temperatures, rain, wind, and dense snow will create increasingly dangerous avalanche conditions today. These ingredients are all stressing buried weak layers, which have been producing very large and destructive avalanches in the past week. Storm instabilities and loose wet avalanches will become more reactive to human or natrual triggers through the day. Careful snowpack evaluation and cautious route-finding are essential with our complex snowpack.

Swan Range
Click here to see the full advisory for 2018-01-18
January 18, 2018 at 7:06

Warm temperatures, rain, wind, and dense snow will create increasingly dangerous avalanche conditions today. These ingredients are all stressing buried weak layers, which have been producing very large and destructive avalanches in the past week. Storm instabilities and loose wet avalanches will become more reactive to human or natrual triggers through the day. Careful snowpack evaluation and cautious route-finding are essential with our complex snowpack.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-18
January 18, 2018 at 7:06

Warm temperatures, rain, wind, and dense snow will create increasingly dangerous avalanche conditions today. These ingredients are all stressing buried weak layers, which have been producing very large and destructive avalanches in the past week. Storm instabilities and loose wet avalanches will become more reactive to human or natrual triggers through the day. Careful snowpack evaluation and cautious route-finding are essential with our complex snowpack.

Whitefish Range
Click here to see the full advisory for 2018-01-17
January 17, 2018 at 7:20

The avalanche danger is gradually trending down following a significant storm. Buried weak layers are slow to adjust though. Heightened avalanche conditions warrant careful terrain selection and snowpack assessments; expect the danger to rise again tomorrow.     

Swan Range
Click here to see the full advisory for 2018-01-17
January 17, 2018 at 7:17

The avalanche danger is gradually trending down following a significant storm and noteworthy deep slab avalanche cycle. Buried weak layers are slow to adjust though; a very destructive deep slab released naturally in the vicinity of Monday night.  Heightened avalanche conditions warrant careful terrain selection and snowpack assessments; expect the danger to rise again tomorrow.     

Whitefish Range
Click here to see the full advisory for 2018-01-17
January 17, 2018 at 6:18

The avalanche danger is gradually trending down following a significant storm and noteworthy deep slab avalanche cycle. Buried weak layers are slow to adjust though; a very destructive deep slab released naturally in the vicinity of Monday night.  Heightened avalanche conditions warrant careful terrain selection and snowpack assessments; expect the danger to rise again tomorrow.     

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-16
January 16, 2018 at 6:43

Stability is improving, but a complicated snowpack with potential for suprising buried weak layers makes for heightened avalanche conditions today.  Carefully assess the snowpack before venturing into steeper terrain above 5,000 ft.  

Whitefish Range
Click here to see the full advisory for 2018-01-16
January 16, 2018 at 6:37

Stability is improving, but a complicated snowpack with potential for suprising buried weak layers makes for heightened avalanche conditions today.  Carefully assess the snowpack before venturing into steeper terrain above 5,000 ft.  

Swan Range
Click here to see the full advisory for 2018-01-16
January 16, 2018 at 6:00

Stability is improving, but a complicated snowpack with potential for suprising buried weak layers makes for heightened avalanche conditions today.  Carefully assess the snowpack before venturing into steeper terrain above 5,000 ft.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-15
January 15, 2018 at 6:52

The bountiful storm cycle is over but lingering storm slab instabilities exist, particularly in areas favored during the Friday/Saturday storm. The likelihood of a human triggered storm slab is decreasing but still possible on steep slopes. In areas that harbor a shallow snowpack It remains possible to trigger a very large avalanche on buried weak layers. With the complexity of problems in our snowpack it is best to travel with a conservative mindset until our snowpack adjusts to recent loading.

Whitefish Range
Click here to see the full advisory for 2018-01-15
January 15, 2018 at 6:50

The bountiful storm cycle is over but lingering storm slab instabilities exist, particularly in areas favored during the Friday/Saturday storm. The likelihood of a human triggered storm slab is decreasing but still possible on steep slopes. In areas that harbor a shallow snowpack It remains possible to trigger a very large avalanche on buried weak layers. With the complexity of problems in our snowpack it is best to travel with a conservative mindset until our snowpack adjusts to recent loading.

Swan Range
Click here to see the full advisory for 2018-01-15
January 15, 2018 at 6:48

The bountiful storm cycle is over but lingering storm slab instabilities exist, particularly in areas favored during the Friday/Saturday storm. The likelihood of a human triggered storm slab is decreasing but still possible on steep slopes. In areas that harbor a shallow snowpack It remains possible to trigger a very large avalanche on buried weak layers. With the complexity of problems in our snowpack it is best to travel with a conservative mindset until our snowpack adjusts to recent loading.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-14
January 14, 2018 at 6:59

Elevated avalanche conditions remain due to recent dense surface snow resting on lower density snow. Natural avalanche activity has diminished but a human triggered storm slab is possible on slopes steeper than 35 degrees at mid and upper elevations. In areas that harbor a shallow snowpack It remains possible to trigger a very large avalanche on buried weak layers. Evaluate the snow structure before committing to a slope and continue to practice safe travel techniques.

Whitefish Range
Click here to see the full advisory for 2018-01-14
January 14, 2018 at 6:58

Recent substantial precipitation has created dangerous avalanche conditions in the Swan Range. Dense surface snow resting on lower density snow has resulted in a storm slab problem. Natural avalanche activity has diminished but a human triggered storm slab is likely on slopes steeper than 35 degrees at mid and upper elevations. Practice patience and safe travel techniques while our snowpack adjusts to this load.

Swan Range
Click here to see the full advisory for 2018-01-14
January 14, 2018 at 6:58

Recent substantial precipitation has created dangerous avalanche conditions with dense surface snow resting on lower density snow. Natural avalanche activity has diminished but a human triggered storm slab is likely on slopes steeper than 35 degrees at mid and upper elevations. In areas that harbor a shallow snowpack It remains possible to trigger a very large avalanche on buried weak layers. Practice patience and safe travel techniques along with evaluating the snow structure while our snowpack adjusts to this load.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-13
January 13, 2018 at 7:00

Elevated avalanche conditions remain as dense snowfall overnight and today, accompanied by light to moderate winds, is deposited on lower density surface snow. A human triggered storm slab is possible on slopes steeper than 35 degrees at upper elevations. In areas that harbor a shallow snowpack It remains possible to trigger a very large avalanche on buried weak layers. Evaluate the snow structure before committing to a slope and continue to practice safe travel techniques.

Whitefish Range
Click here to see the full advisory for 2018-01-13
January 13, 2018 at 7:00

Elevated avalanche conditions remain as dense snowfall overnight and today, accompanied by light to moderate winds, is deposited on lower density surface snow. A human triggered storm slab is possible on slopes steeper than 35 degrees at upper elevations. In areas that harbor a shallow snowpack It remains possible to trigger a very large avalanche on buried weak layers. Evaluate the snow structure before committing to a slope and continue to practice safe travel techniques.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-01-13
January 13, 2018 at 6:58

Dangerous avalanche conditions remain as dense snowfall overnight and today, accompanied by light to moderate winds, is deposited on lower density surface snow. A human triggered storm slab is likely on slopes steeper than 35 degrees at mid and upper elevations. Evaluate the surface snow structure and continue to practice safe travel techniques.

Swan Range

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