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 2017-01-17
January 17, 2017 at 6:56

Southwest winds have increased overnight likely forming fresh wind slabs. Older wind slabs have been slow to strengthen. Weak layers formed earlier in the season have continued to weaken and remain a concern. The avalanche danger is MODERATE above 5000 feet. Carefully evaluate the snowpack and your terrain choices. Pay close attention to the changing weather today and be aware that quickly warming temperatures may increase the avalanche danger.

Whitefish Range
Click here to see the full advisory for 2017-01-16
January 16, 2017 at 6:36

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  At upper elevation locations fresh wind slabs continue to form and older wind slabs have been slow to strengthen. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers exist throughout our pack and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-16
January 16, 2017 at 6:36

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  At upper elevation locations fresh wind slabs continue to form and older wind slabs have been slow to strengthen. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers exist throughout our pack and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Whitefish Range
Click here to see the full advisory for 2017-01-16
January 16, 2017 at 6:36

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  At upper elevation locations fresh wind slabs continue to form and older wind slabs have been slow to strengthen. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers exist throughout our pack and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Swan Range
Click here to see the full advisory for 2017-01-15
January 15, 2017 at 6:02

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  Fresh wind slabs continue to form in the alpine terrain. Older wind slabs have been slow to strengthen. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers exist throughout our pack and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-15
January 15, 2017 at 6:02

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  Fresh wind slabs continue to form in the alpine terrain. Older wind slabs have been slow to strengthen. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers exist throughout our pack and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Whitefish Range
Click here to see the full advisory for 2017-01-15
January 15, 2017 at 6:02

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  Fresh wind slabs continue to form in the alpine terrain. Older wind slabs have been slow to strengthen. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers exist throughout our pack and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Swan Range
Click here to see the full advisory for 2017-01-14
January 14, 2017 at 6:47

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  Recent winds have drifted snow onto a variety of aspects forming thin wind slabs. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers formed earlier in the season continue to weaken and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-14
January 14, 2017 at 6:47

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  Recent winds have drifted snow onto a variety of aspects forming thin wind slabs. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers formed earlier in the season continue to weaken and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Whitefish Range
Click here to see the full advisory for 2017-01-14
January 14, 2017 at 6:47

Above 5000 feet, the avalanche danger is MODERATE and human triggered avalanches are possible.  Recent winds have drifted snow onto a variety of aspects forming thin wind slabs. Carefully evaluate wind loaded terrain before committing to a slope. Weak layers formed earlier in the season continue to weaken and remain a concern. Avoid steep, rocky terrain and slopes with a shallow snow pack.

Swan Range
Click here to see the full advisory for 2017-01-13
January 13, 2017 at 7:00

Today the avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible.  Variable wind direction over the past week created slabs on multiple aspects. Carefully evaluate wind loaded terrain before committing to a slope. Additionally, weak snow exists deep in the snow pack so lower your odds of triggering a deeper layer by avoiding steep, rocky terrain and slopes with a shallow snow pack.

Whitefish Range
Click here to see the full advisory for 2017-01-13
January 13, 2017 at 7:00

Today the avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible.  Variable wind direction over the past week created slabs on multiple aspects. Carefully evaluate wind loaded terrain before committing to a slope. Additionally, weak snow exists deep in the snow pack so lower your odds of triggering a deeper layer by avoiding steep, rocky terrain and slopes with a shallow snow pack.

Swan Range
Click here to see the full advisory for 2017-01-13
January 13, 2017 at 7:00

Today the avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible.  Variable wind direction over the past week created slabs on multiple aspects. Carefully evaluate wind loaded terrain before committing to a slope. Additionally, weak snow exists deep in the snow pack so lower your odds of triggering a deeper layer by avoiding steep, rocky terrain and slopes with a shallow snow pack.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-12
January 12, 2017 at 7:00

Natural avalanche activity was reported in wind loaded terrain yesterday. Wind continued to drift the snow and thicken slabs that I expect to remain sensitive to human triggers today. The avalanche danger is CONSIDERABLE above 6000 feet. Be aware of the potential for small avalanches to stress deep weak layers resulting in deeper slides. Dig into the snow and look for weak layers that exists in the mid snow pack and choose less complex terrain where present.

Swan Range
Click here to see the full advisory for 2017-01-12
January 12, 2017 at 7:00

Natural avalanche activity was reported in wind loaded terrain yesterday. Wind continued to drift the snow and thicken slabs that I expect to remain sensitive to human triggers today. The avalanche danger is CONSIDERABLE above 6000 feet. Be aware of the potential for small avalanches to stress deep weak layers resulting in deeper slides. Dig into the snow and look for weak layers that exists in the mid snow pack and choose less complex terrain where present.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-12
January 12, 2017 at 7:00

Natural avalanche activity was reported in wind loaded terrain yesterday. Wind continued to drift the snow and thicken slabs that I expect to remain sensitive to human triggers today. The avalanche danger is CONSIDERABLE above 6000 feet. Be aware of the potential for small avalanches to stress deep weak layers resulting in deeper slides. Dig into the snow and look for weak layers that exists in the mid snow pack and choose less complex terrain where present.

Whitefish Range
Click here to see the full advisory for 2017-01-11
January 11, 2017 at 7:00

Winds out of the Northeast are transporting recent storm snow onto slopes not normally loaded. The recent storm deposited denser layers of snow onto a layer of lighter, less dense snow, creating dangerous avalanche conditions. It is also possible for avalanches to step down to weak layers that exist deeper in the snowpack. The avalanche danger is CONSIDERABLE  above 5000 feet.  Human triggered avalanches are likely and conservative decision-making is essential today.

 

 

 

Swan Range
Click here to see the full advisory for 2017-01-11
January 11, 2017 at 7:00

Winds out of the Northeast are transporting recent storm snow onto slopes not normally loaded. The recent storm deposited denser layers of snow onto a layer of lighter, less dense snow, creating dangerous avalanche conditions. It is also possible for avalanches to step down to weak layers that exist deeper in the snowpack. The avalanche danger is CONSIDERABLE  above 5000 feet.  Human triggered avalanches are likely and conservative decision-making is essential today.

 

 

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-11
January 11, 2017 at 7:00

Winds out of the Northeast are transporting recent storm snow onto slopes not normally loaded. The recent storm deposited denser layers of snow onto a layer of lighter, less dense snow, creating dangerous avalanche conditions. It is also possible for avalanches to step down to weak layers that exist deeper in the snowpack. The avalanche danger is CONSIDERABLE  above 5000 feet.  Human triggered avalanches are likely and conservative decision-making is essential today.

 

 

 

Whitefish Range
Click here to see the full advisory for 2017-01-10
January 10, 2017 at 7:00

New snowfall and winds formed fresh slabs across our advisory area. The recent storm brought us warmer temperatures and dense, heavy snow. This accumulated onto a layer of lighter, less dense snow, creating dangerous avalanche conditions. It is also possible for avalanches to step down to weak layers that exist deeper in the snowpack. The avalanche danger is CONSIDERABLE  above 5000 feet.  Human triggered avalanches are likely and conservative decision-making is essential today. 

 

 

 

Swan Range
Click here to see the full advisory for 2017-01-10
January 10, 2017 at 7:00

New snowfall and winds formed fresh slabs across our advisory area. The recent storm brought us warmer temperatures and dense, heavy snow. This accumulated onto a layer of lighter, less dense snow, creating dangerous avalanche conditions. It is also possible for avalanches to step down to weak layers that exist deeper in the snowpack. The avalanche danger is CONSIDERABLE  above 5000 feet.  Human triggered avalanches are likely and conservative decision-making is essential today. 

 

 

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-10
January 10, 2017 at 7:00

New snowfall and winds formed fresh slabs across our advisory area. The recent storm brought us warmer temperatures and dense, heavy snow. This accumulated onto a layer of lighter, less dense snow, creating dangerous avalanche conditions. It is also possible for avalanches to step down to weak layers that exist deeper in the snowpack. The avalanche danger is CONSIDERABLE  above 5000 feet.  Human triggered avalanches are likely and conservative decision-making is essential today. 

 

 

 

Whitefish Range
Click here to see the full advisory for 2017-01-09
January 9, 2017 at 7:00

Dangerous avalanche conditions exist and human triggered avalanches are likely today. Warm heavy snow, accompanied by wind, is being deposited onto a cold low density snow surface. Avalanches today could step down into deeper weak layers. This morning the avalanche danger is CONSIDERABLE above 5000' but may rise throughout the day with continued snow and wind. Conservative decision making is essential.

Swan Range
Click here to see the full advisory for 2017-01-09
January 9, 2017 at 7:00

Dangerous avalanche conditions exist and human triggered avalanches are likely today. Warm heavy snow, accompanied by wind, is being deposited onto a cold low density snow surface. Avalanches today could step down into deeper weak layers. This morning the avalanche danger is CONSIDERABLE above 5000' but may rise throughout the day with continued snow and wind. Conservative decision making is essential.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-09
January 9, 2017 at 7:00

Dangerous avalanche conditions exist and human triggered avalanches are likely today. Warm heavy snow, accompanied by wind, is being deposited onto a cold low density snow surface. Avalanches today could step down into deeper weak layers. This morning the avalanche danger is CONSIDERABLE above 5000' but may rise throughout the day with continued snow and wind. Conservative decision making is essential.

Whitefish Range
Click here to see the full advisory for 2017-01-08
January 8, 2017 at 6:53

Several generations of wind slabs exist at mid and upper elevations throughout our area. Recent cold temperatures has delayed the strengthening process for these slabs and contributed to the weakening of the snowpack below these slabs. The avalanche danger is MODERATE above 5000 feet where human triggered avalanches are possible. Carefully evaluate wind loaded slopes and keep in mind the potential for a small avalanche to step down in to deeper weak layers

Swan Range
Click here to see the full advisory for 2017-01-08
January 8, 2017 at 6:53

Several generations of wind slabs exist at mid and upper elevations throughout our area. Recent cold temperatures has delayed the strengthening process for these slabs and contributed to the weakening of the snowpack below these slabs. The avalanche danger is MODERATE above 5000 feet where human triggered avalanches are possible. Carefully evaluate wind loaded slopes and keep in mind the potential for a small avalanche to step down in to deeper weak layers

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-01-08
January 8, 2017 at 6:53

Several generations of wind slabs exist at mid and upper elevations throughout our area. Recent cold temperatures has delayed the strengthening process for these slabs and contributed to the weakening of the snowpack below these slabs. The avalanche danger is MODERATE above 5000 feet where human triggered avalanches are possible. Carefully evaluate wind loaded slopes and keep in mind the potential for a small avalanche to step down in to deeper weak layers

Whitefish Range
Click here to see the full advisory for 2017-01-07
January 7, 2017 at 6:50

Wind slabs formed on atypical slopes earlier in the week still harbor instabilities. Recent winds have created thin slabs on typical leeward slopes at upper elevations. In some locations these slabs were deposited onto weak snow which adds to their instability. The avalanche danger is MODERATE above 5000 feet where human triggered avalanches are possible. Carefully evaluate wind loaded slopes and keep in mind the potential for a small avalanche to step down in to deeper weak layers

Swan Range
Click here to see the full advisory for 2017-01-07
January 7, 2017 at 6:50

Wind slabs formed on atypical slopes earlier in the week still harbor instabilities. Recent winds have created thin slabs on typical leeward slopes at upper elevations. In some locations these slabs were deposited onto weak snow which adds to their instability. The avalanche danger is MODERATE above 5000 feet where human triggered avalanches are possible. Carefully evaluate wind loaded slopes and keep in mind the potential for a small avalanche to step down in to deeper weak layers

Flathead Range and Glacier National Park

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