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 2015-02-15
February 15, 2015 at 6:56

The avalanche hazard is MODERATE in steep terrain above 5500 feet. Human triggered avalanches are possible in isolated areas where buried surface hoar survived the recent series of warm, wet storm systems. Dig into the snow to determine if this weak layer is present, and where it is choose conservative, low angle terrain.  Below 5500 feet the hazard is LOW.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-14
February 14, 2015 at 6:58

Increased cloud cover and slightly cooler temperatures will decrease the loose, wet avalanche hazard today. However, above freezing temperatures are still expected and human triggered avalanches remain possible. The hazard is MODERATE above 5000 feet. In isolated areas, surface hoar formed in late January still exists and has proven reactive. Continue to assess the snow pack for deeper instabilities and choose conservative terrain where present and reactive.

Whitefish Range
Click here to see the full advisory for 2015-02-14
February 14, 2015 at 6:58

Increased cloud cover and slightly cooler temperatures will decrease the loose, wet avalanche hazard today. However, above freezing temperatures are still expected and human triggered avalanches remain possible. The hazard is MODERATE above 5000 feet. In isolated areas, surface hoar formed in late January still exists and has proven reactive. Continue to assess the snow pack for deeper instabilities and choose conservative terrain where present and reactive.

Swan Range
Click here to see the full advisory for 2015-02-14
February 14, 2015 at 6:58

Increased cloud cover and slightly cooler temperatures will decrease the loose, wet avalanche hazard today. However, above freezing temperatures are still expected and human triggered avalanches remain possible. The hazard is MODERATE above 5000 feet. In isolated areas, surface hoar formed in late January still exists and has proven reactive. Continue to assess the snow pack for deeper instabilities and choose conservative terrain where present and reactive.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-13
February 13, 2015 at 6:31

Unscheduled advisory update: The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs but will rise to CONSIDERABLE on sunny aspects today as skies clear. Both natural and human triggered wet, loose avalanches are likely today. Below 5500 feet the hazard is LOW. Ample sunshine, 1-2 feet of wet, heavy snow from 3-5 days ago, and well above freezing temperatures will cause a wet snow hazard today.

Whitefish Range
Click here to see the full advisory for 2015-02-13
February 13, 2015 at 6:31

Unscheduled advisory update: The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs but will rise to CONSIDERABLE on sunny aspects today as skies clear. Both natural and human triggered wet, loose avalanches are likely today. Below 5500 feet the hazard is LOW. Ample sunshine, 1-2 feet of wet, heavy snow from 3-5 days ago, and well above freezing temperatures will cause a wet snow hazard today.

Swan Range
Click here to see the full advisory for 2015-02-13
February 13, 2015 at 6:31

Unscheduled advisory update: The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs but will rise to CONSIDERABLE on sunny aspects today as skies clear. Both natural and human triggered wet, loose avalanches are likely today. Below 5500 feet the hazard is LOW. Ample sunshine, 1-2 feet of wet, heavy snow from 3-5 days ago, and well above freezing temperatures will cause a wet snow hazard today.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-12
February 12, 2015 at 6:49

The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs with the potential for wet, loose avalanches as the day warms. Below 5500 feet the hazard is LOW. Since last Thursday through Tuesday over 1-2 feet of heavy, wet snow accumulated above 6000 feet. Human triggered avalanches are possible so evaluate snow and terrain carefully today. The hazard could be higher if skies clear more than expected and wet snow avalanches become more likely.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-12
February 12, 2015 at 6:49

The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs with the potential for wet, loose avalanches as the day warms. Below 5500 feet the hazard is LOW. Since last Thursday through Tuesday over 1-2 feet of heavy, wet snow accumulated above 6000 feet. Human triggered avalanches are possible so evaluate snow and terrain carefully today. The hazard could be higher if skies clear more than expected and wet snow avalanches become more likely.

Whitefish Range
Click here to see the full advisory for 2015-02-12
February 12, 2015 at 6:49

The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs with the potential for wet, loose avalanches as the day warms. Below 5500 feet the hazard is LOW. Since last Thursday through Tuesday over 1-2 feet of heavy, wet snow accumulated above 6000 feet. Human triggered avalanches are possible so evaluate snow and terrain carefully today. The hazard could be higher if skies clear more than expected and wet snow avalanches become more likely.

Swan Range
Click here to see the full advisory for 2015-02-10
February 10, 2015 at 7:00

Heavy, wet snow and rain overnight continuing into today created unstable conditions. The hazard is CONSIDERABLE above 5000 feet and MODERATE below 5000 feet. Human triggered avalanches are likely and natural avalanches are possible today. Since last Thursday a series of warm, wet storms deposited substantial new snow above 6500 feet and rain on snow below this elevation. Dangerous avalanche conditions exist and cautious route-finding and conservative decision making are essential.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-10
February 10, 2015 at 7:00

Heavy, wet snow and rain overnight continuing into today created unstable conditions. The hazard is CONSIDERABLE above 5000 feet and MODERATE below 5000 feet. Human triggered avalanches are likely and natural avalanches are possible today. Since last Thursday a series of warm, wet storms deposited substantial new snow above 6500 feet and rain on snow below this elevation. Dangerous avalanche conditions exist and cautious route-finding and conservative decision making are essential.

Whitefish Range
Click here to see the full advisory for 2015-02-10
February 10, 2015 at 7:00

Heavy, wet snow and rain overnight continuing into today created unstable conditions. The hazard is CONSIDERABLE above 5000 feet and MODERATE below 5000 feet. Human triggered avalanches are likely and natural avalanches are possible today. Since last Thursday a series of warm, wet storms deposited substantial new snow above 6500 feet and rain on snow below this elevation. Dangerous avalanche conditions exist and cautious route-finding and conservative decision making are essential.

Swan Range
Click here to see the full advisory for 2015-02-08
February 8, 2015 at 7:08

The northern part of the advisory area was strongly favored with recent precipitation. Wet, heavy snow or rain, warm temperatures and gusty winds in the Swan Range still contributed to dangerous conditions. The hazard in CONSIDERABLE above 5000 feet. Human triggered loose, wet and storm slab avalanches are likely. Careful snow pack evaluation and conservative terrain selection are important.

Swan Range
Click here to see the full advisory for 2015-02-08
February 8, 2015 at 6:58

A substantial amount of wet, heavy snow or rain, strong gusty winds, and warm temperatures created dangerous avalanche conditions. The hazard is HIGH on all slopes above 6000 feet. Travel in avalanche terrain and run-out zones is not recommended. The hazard below 6000 feet is CONSIDERABLE and human triggered storm slab and loose, wet avalanches are likely. At low to mid elevations it is just as important to consider the terrain above you as assessing the slope below.

Whitefish Range
Click here to see the full advisory for 2015-02-08
February 8, 2015 at 6:58

A substantial amount of wet, heavy snow or rain, strong gusty winds, and warm temperatures created dangerous avalanche conditions. The hazard is HIGH on all slopes above 6000 feet. Travel in avalanche terrain and run-out zones is not recommended. The hazard below 6000 feet is CONSIDERABLE and human triggered storm slab and loose, wet avalanches are likely. At low to mid elevations it is just as important to consider the terrain above you as assessing the slope below.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-07
February 7, 2015 at 7:07

Recent snow totals favored the northern part of the advisory area. The hazard is in the Swan Range is CONSIDERABLE on slopes above 5000 feet especially where wind drifted snow created slabs over an existing weak snow structure. Other terrain above 5000 feet is rated MODERATE and human triggered avalanches are possible. Be aware of changing weather conditions today and carefully evaluate recent storm instability before commiting to a slope.

Swan Range
Click here to see the full advisory for 2015-02-07
February 7, 2015 at 6:57

In many locations across the advisory area temperatures failed to drop below freezing in the past 24 hours. Warm temperatures combined with moderate to strong wind and rain on a previously weak snow structure created dangerous avalanche conditions. The hazard is HIGH on wind loaded slopes above 6000 feet and travel in this terrain and avalanche run-out zones is not recommended. Other terrain above 5000 feet is rated CONSIDERABLE and human triggered loose, wet and storm slab avalanches are likely.

Whitefish Range
Click here to see the full advisory for 2015-02-07
February 7, 2015 at 6:57

In many locations across the advisory area temperatures failed to drop below freezing in the past 24 hours. Warm temperatures combined with moderate to strong wind and rain on a previously weak snow structure created dangerous avalanche conditions. The hazard is HIGH on wind loaded slopes above 6000 feet and travel in this terrain and avalanche run-out zones is not recommended. Other terrain above 5000 feet is rated CONSIDERABLE and human triggered loose, wet and storm slab avalanches are likely.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-06
February 6, 2015 at 6:43

The hazard is HIGH above 6000 ft. and CONSIDERABLE below 6000 feet, particularly in the northern part of the ranges. Heavy, wet snow, strong winds, and rain on new snow continues to accumulate over a weak layer of buried surface hoar that sits on a crust throughout most of the advisory area. Dangerous avalanche conditions exist and both human triggered and natural avalanches will become more likely as the day progresses. Travel in avalanche terrain is not recommended.

Whitefish Range
Click here to see the full advisory for 2015-02-06
February 6, 2015 at 6:43

The hazard is HIGH above 6000 ft. and CONSIDERABLE below 6000 feet, particularly in the northern part of the ranges. Heavy, wet snow, strong winds, and rain on new snow continues to accumulate over a weak layer of buried surface hoar that sits on a crust throughout most of the advisory area. Dangerous avalanche conditions exist and both human triggered and natural avalanches will become more likely as the day progresses. Travel in avalanche terrain is not recommended.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-06
February 6, 2015 at 6:41

Due to new snow, rain, and moderate to strong winds the hazard is CONSIDERABLE above 5000 feet. Heavy, wet snow and rain on new snow continues to accumulate over a weak layer of buried surface hoar that sits on a crust throughout most of the advisory area. Dangerous avalanche conditions exist and both human triggered and natural avalanches will become more likely as the day progresses. 

Swan Range
Click here to see the full advisory for 2015-02-05
February 5, 2015 at 6:56

The avalanche hazard will increase throughout the day. The hazard will rise to CONSIDERABLE on all slopes above 5000 feet as heavy, wet snow accumulates over a weak layer of buried surface hoar that sits on a crust. Dangerous avalanche conditions will develop and human triggered avalanches will become more likely as the day progresses. Natural activity will also be possible. Expect the hazard to rise over the next few days as this potent storm moves through the advisory area.

Whitefish Range
Click here to see the full advisory for 2015-02-05
February 5, 2015 at 6:56

The avalanche hazard will increase throughout the day. The hazard will rise to CONSIDERABLE on all slopes above 5000 feet as heavy, wet snow accumulates over a weak layer of buried surface hoar that sits on a crust. Dangerous avalanche conditions will develop and human triggered avalanches will become more likely as the day progresses. Natural activity will also be possible. Expect the hazard to rise over the next few days as this potent storm moves through the advisory area.

Swan Range
Click here to see the full advisory for 2015-02-05
February 5, 2015 at 6:56

The avalanche hazard will increase throughout the day. The hazard will rise to CONSIDERABLE on all slopes above 5000 feet as heavy, wet snow accumulates over a weak layer of buried surface hoar that sits on a crust. Dangerous avalanche conditions will develop and human triggered avalanches will become more likely as the day progresses. Natural activity will also be possible. Expect the hazard to rise over the next few days as this potent storm moves through the advisory area.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-03
February 3, 2015 at 6:55

New snow (4-10 inches) accompanied by moderate to strong winds over the past 48 hours created sensitive wind slabs. These new slabs sit on top of a weak layer of buried surface hoar and a crust. This combination makes the hazard CONSIDERABLE on wind loaded slopes above 5000 feet. Human triggered avalanches are likely in wind loaded terrain today. All other terrain is rated MODERATE where human triggered avalanches are possible. 

Whitefish Range
Click here to see the full advisory for 2015-02-03
February 3, 2015 at 6:55

New snow (4-10 inches) accompanied by moderate to strong winds over the past 48 hours created sensitive wind slabs. These new slabs sit on top of a weak layer of buried surface hoar and a crust. This combination makes the hazard CONSIDERABLE on wind loaded slopes above 5000 feet. Human triggered avalanches are likely in wind loaded terrain today. All other terrain is rated MODERATE where human triggered avalanches are possible. 

Swan Range
Click here to see the full advisory for 2015-02-03
February 3, 2015 at 6:55

New snow (4-10 inches) accompanied by moderate to strong winds over the past 48 hours created sensitive wind slabs. These new slabs sit on top of a weak layer of buried surface hoar and a crust. This combination makes the hazard CONSIDERABLE on wind loaded slopes above 5000 feet. Human triggered avalanches are likely in wind loaded terrain today. All other terrain is rated MODERATE where human triggered avalanches are possible. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-02
February 2, 2015 at 8:43

2-4 inches of new snow fell on a variety of surfaces including surface hoar and crusts. Pay close attention to wind loaded slopes where thicker slabs could be present today. The avalanche hazard is likely to increase as more snow falls today through the week. The next regularly scheduled advisory will be issues Tuesday, Feb. 3, 2015.

 

Whitefish Range
Click here to see the full advisory for 2015-02-02
February 2, 2015 at 8:43

2-4 inches of new snow fell on a variety of surfaces including surface hoar and crusts. Pay close attention to wind loaded slopes where thicker slabs could be present today. The avalanche hazard is likely to increase as more snow falls today through the week. The next regularly scheduled advisory will be issues Tuesday, Feb. 3, 2015.

 

Swan Range

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