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, December 13, 2017
E.g., Wednesday, December 13, 2017
E.g., Wednesday, December 13, 2017
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2017-12-12
December 12, 2017 at 7:05

Today is another great day to travel into the mountains and take advantage of generally stable avalanche conditions and unseasonably nice weather.  Watch for isolated areas of unstable snow, especially point release avalanches in extreme or hazardous terrain.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-12
December 12, 2017 at 7:05

Today is another great day to travel into the mountains and take advantage of generally stable avalanche conditions and unseasonably nice weather.  Watch for isolated areas of unstable snow, especially point release avalanches in extreme or hazardous terrain.  

Whitefish Range
Click here to see the full advisory for 2017-12-12
December 12, 2017 at 7:05

Today is another great day to travel into the mountains and take advantage of generally stable avalanche conditions and unseasonably nice weather.  Watch for isolated areas of unstable snow, especially point release avalanches in extreme or hazardous terrain.  

Swan Range
Click here to see the full advisory for 2017-12-11
December 11, 2017 at 6:47

The avalanche danger is LOW on all slopes due to a lack of recent snow. Continued warm sunny conditions will affect the surface snow resulting in a continued wet loose avalanche problem at middle and upper elevations. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Evaluate the moisture content of the surface snow along with all wind loaded terrain before committing to a slope. 

Whitefish Range
Click here to see the full advisory for 2017-12-11
December 11, 2017 at 6:47

The avalanche danger is LOW on all slopes due to a lack of recent snow. Continued warm sunny conditions will affect the surface snow resulting in a continued wet loose avalanche problem at middle and upper elevations. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Evaluate the moisture content of the surface snow along with all wind loaded terrain before committing to a slope. 

Swan Range
Click here to see the full advisory for 2017-12-11
December 11, 2017 at 6:47

The avalanche danger is LOW on all slopes due to a lack of recent snow. Continued warm sunny conditions will affect the surface snow resulting in a continued wet loose avalanche problem at middle and upper elevations. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Evaluate the moisture content of the surface snow along with all wind loaded terrain before committing to a slope. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-10
December 10, 2017 at 6:54

The avalanche danger is LOW on all slopes due to a lack of recent snow. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Look for rounded pillows of snow and obvious signs of instability like cracking and collapsing. Warm sunny conditions are weakening the surface snow on sunny aspects creating a wet loose problem. Evaluate the moisture content of the surface snow along with all wind loaded terrain before committing to a slope. 

Whitefish Range
Click here to see the full advisory for 2017-12-10
December 10, 2017 at 6:54

The avalanche danger is LOW on all slopes due to a lack of recent snow. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Look for rounded pillows of snow and obvious signs of instability like cracking and collapsing. Warm sunny conditions are weakening the surface snow on sunny aspects creating a wet loose problem. Evaluate the moisture content of the surface snow along with all wind loaded terrain before committing to a slope. 

Swan Range
Click here to see the full advisory for 2017-12-10
December 10, 2017 at 6:54

The avalanche danger is LOW on all slopes due to a lack of recent snow. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Look for rounded pillows of snow and obvious signs of instability like cracking and collapsing. Warm sunny conditions are weakening the surface snow on sunny aspects creating a wet loose problem. Evaluate the moisture content of the surface snow along with all wind loaded terrain before committing to a slope. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-09
December 9, 2017 at 6:46

The avalanche danger is LOW on all aspects at all elevations due to recent benign weather. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Look for rounded pillows of snow and obvious signs of instability like cracking and collapsing. Evaluate all wind loaded terrain before committing to a slope. Continue to carry avalanche safety gear, practice using it, and follow  safe travel techniques that you would mid-winter.

Whitefish Range
Click here to see the full advisory for 2017-12-09
December 9, 2017 at 6:46

The avalanche danger is LOW on all aspects at all elevations due to recent benign weather. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Look for rounded pillows of snow and obvious signs of instability like cracking and collapsing. Evaluate all wind loaded terrain before committing to a slope. Continue to carry avalanche safety gear, practice using it, and follow  safe travel techniques that you would mid-winter.

Swan Range
Click here to see the full advisory for 2017-12-09
December 9, 2017 at 6:46

The avalanche danger is LOW on all aspects at all elevations due to recent benign weather. Isolated wind slabs exist on upper elevation slopes favored by wind loading. Look for rounded pillows of snow and obvious signs of instability like cracking and collapsing. Evaluate all wind loaded terrain before committing to a slope. Continue to carry avalanche safety gear, practice using it, and follow  safe travel techniques that you would mid-winter.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-04
December 4, 2017 at 9:04

Early Season Snowpack Update:  Recent snowfall has brought improved riding conditions at upper elevations, but isolated instabilities may exist as you climb into wind affected terrain.  Watch for shallow wind slabs on steep, wind-loaded slopes where the consequences of a slide could be dangerous.  Stability will continue to improve over the course of the week under a stagnant weather pattern.  The FAC will begin daily forecasts on December 9th. 

Whitefish Range
Click here to see the full advisory for 2017-12-04
December 4, 2017 at 9:04

Early Season Snowpack Update:  Recent snowfall has brought improved riding conditions at upper elevations, but isolated instabilities may exist as you climb into wind affected terrain.  Watch for shallow wind slabs on steep, wind-loaded slopes where the consequences of a slide could be dangerous.  Stability will continue to improve over the course of the week under a stagnant weather pattern.  The FAC will begin daily forecasts on December 9th. 

Swan Range
Click here to see the full advisory for 2017-12-04
December 4, 2017 at 9:04

Early Season Snowpack Update:  Recent snowfall has brought improved riding conditions at upper elevations, but isolated instabilities may exist as you climb into wind affected terrain.  Watch for shallow wind slabs on steep, wind-loaded slopes where the consequences of a slide could be dangerous.  Stability will continue to improve over the course of the week under a stagnant weather pattern.  The FAC will begin daily forecasts on December 9th. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-02
December 2, 2017 at 6:58

Recent incremental snowfall, combined with breezy westerly winds, has formed wind slabs on upper elevation leeward and cross loaded slopes. In many locations these slabs are resting on the stout Thanksgiving rain crust which may act as a slippery bed surface.  Forecasted snow and wind Saturday night/Sunday will thicken these slabs and potentially increase the wind slab hazard. Evaluate all upper elevation wind loaded terrain before committing to a slope.

Whitefish Range
Click here to see the full advisory for 2017-12-02
December 2, 2017 at 6:58

Recent incremental snowfall, combined with breezy westerly winds, has formed wind slabs on upper elevation leeward and cross loaded slopes. In many locations these slabs are resting on the stout Thanksgiving rain crust which may act as a slippery bed surface.  Forecasted snow and wind Saturday night/Sunday will thicken these slabs and potentially increase the wind slab hazard. Evaluate all upper elevation wind loaded terrain before committing to a slope.

Swan Range
Click here to see the full advisory for 2017-12-02
December 2, 2017 at 6:58

Recent incremental snowfall, combined with breezy westerly winds, has formed wind slabs on upper elevation leeward and cross loaded slopes. In many locations these slabs are resting on the stout Thanksgiving rain crust which may act as a slippery bed surface.  Forecasted snow and wind Saturday night/Sunday will thicken these slabs and potentially increase the wind slab hazard. Evaluate all upper elevation wind loaded terrain before committing to a slope.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-11-29
November 29, 2017 at 8:41

Last night's storm produced new snow with moderate wind speeds and strong gusts. Over the next few days, winds will continue so anticipate wind slab formation to increase in our higher elevation terrain. Wind slabs are more sensitive to human triggering shortly after formation especially in steeper terrain. Wind slabs are now sitting on top of our Thanksgiving rain crust so use small test slopes to assess the depth and sensitivity before committing to slopes steeper than 35 degrees. 

Whitefish Range
Click here to see the full advisory for 2017-11-29
November 29, 2017 at 8:41

Last night's storm produced new snow with moderate wind speeds and strong gusts. Over the next few days, winds will continue so anticipate wind slab formation to increase in our higher elevation terrain. Wind slabs are more sensitive to human triggering shortly after formation especially in steeper terrain. Wind slabs are now sitting on top of our Thanksgiving rain crust so use small test slopes to assess the depth and sensitivity before committing to slopes steeper than 35 degrees. 

Swan Range
Click here to see the full advisory for 2017-11-29
November 29, 2017 at 8:41

Last night's storm produced new snow with moderate wind speeds and strong gusts. Over the next few days, winds will continue so anticipate wind slab formation to increase in our higher elevation terrain. Wind slabs are more sensitive to human triggering shortly after formation especially in steeper terrain. Wind slabs are now sitting on top of our Thanksgiving rain crust so use small test slopes to assess the depth and sensitivity before committing to slopes steeper than 35 degrees. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-11-24
November 24, 2017 at 7:51

Recent substantial rain, combined with above freezing temperatures, has created a wet avalanche problem at all elevations. Natural avalanche activity is diminishing but human triggered avalanches in the saturated snow surface remain a concern. A deeper weak layer in the snowpack has also been stressed by the weight of this storm. Give the snowpack time to adjust to this unusual event while recreating on lower angle terrain and practicing safe travel techniques.

Whitefish Range
Click here to see the full advisory for 2017-11-24
November 24, 2017 at 7:51

Recent substantial rain, combined with above freezing temperatures, has created a wet avalanche problem at all elevations. Natural avalanche activity is diminishing but human triggered avalanches in the saturated snow surface remain a concern. A deeper weak layer in the snowpack has also been stressed by the weight of this storm. Give the snowpack time to adjust to this unusual event while recreating on lower angle terrain and practicing safe travel techniques.

Swan Range
Click here to see the full advisory for 2017-11-24
November 24, 2017 at 7:51

Recent substantial rain, combined with above freezing temperatures, has created a wet avalanche problem at all elevations. Natural avalanche activity is diminishing but human triggered avalanches in the saturated snow surface remain a concern. A deeper weak layer in the snowpack has also been stressed by the weight of this storm. Give the snowpack time to adjust to this unusual event while recreating on lower angle terrain and practicing safe travel techniques.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-11-21
November 21, 2017 at 17:52

Special Avalanche Bulletin:  Dangerous avalanche conditions will develop overnight and continue through Thursday.  Rapid warming and significant rainfall will cause widespread areas of unstable snow at mid and upper elevations.  Natural avalanches are likely.  Avalanches may run into areas with minimal snow coverage.  TRAVEL IN OR BELOW AVALANCHE TERRAIN IS NOT RECOMMENDED. 

 

Whitefish Range
Click here to see the full advisory for 2017-11-21
November 21, 2017 at 17:52

Special Avalanche Bulletin:  Dangerous avalanche conditions will develop overnight and continue through Thursday.  Rapid warming and significant rainfall will cause widespread areas of unstable snow at mid and upper elevations.  Natural avalanches are likely.  Avalanches may run into areas with minimal snow coverage.  TRAVEL IN OR BELOW AVALANCHE TERRAIN IS NOT RECOMMENDED. 

 

Swan Range
Click here to see the full advisory for 2017-11-21
November 21, 2017 at 17:52

Special Avalanche Bulletin:  Dangerous avalanche conditions will develop overnight and continue through Thursday.  Rapid warming and significant rainfall will cause widespread areas of unstable snow at mid and upper elevations.  Natural avalanches are likely.  Avalanches may run into areas with minimal snow coverage.  TRAVEL IN OR BELOW AVALANCHE TERRAIN IS NOT RECOMMENDED. 

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-11-19
November 19, 2017 at 7:53

Early Season Snowpack Update:  Dangerous avalanche conditions will be developing at mid to upper elevations over the next several days as heavy precipitation, intense winds, and rising freezing levels take aim on Northwest Montana.  Natural avalanche activity will increase as this system evolves.  Backcountry travelers should expect rapidly changing conditions and avoid traveling on or below steep avalanche terrain, especially in terrain receiving intense windloading or rain on snow.  

 

Whitefish Range
Click here to see the full advisory for 2017-11-19
November 19, 2017 at 7:53

Early Season Snowpack Update:  Dangerous avalanche conditions will be developing at mid to upper elevations over the next several days as heavy precipitation, intense winds, and rising freezing levels take aim on Northwest Montana.  Natural avalanche activity will increase as this system evolves.  Backcountry travelers should expect rapidly changing conditions and avoid traveling on or below steep avalanche terrain, especially in terrain receiving intense windloading or rain on snow.  

 

Swan Range
Click here to see the full advisory for 2017-11-19
November 19, 2017 at 7:53

Early Season Snowpack Update:  Dangerous avalanche conditions will be developing at mid to upper elevations over the next several days as heavy precipitation, intense winds, and rising freezing levels take aim on Northwest Montana.  Natural avalanche activity will increase as this system evolves.  Backcountry travelers should expect rapidly changing conditions and avoid traveling on or below steep avalanche terrain, especially in terrain receiving intense windloading or rain on snow.  

 

Flathead Range and Glacier National Park

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