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 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
Click here to see the full advisory for 2017-12-27
December 27, 2017 at 7:05

It has been a week since our major storm and avalanche cycle, and the snowpack is gradually adjusting.  Although the likelihood of triggering a persistent slab avalanche has significantly decreased, the consequences of triggering one of these avalanches remains large and deadly.  Carefully assess the snowpack and give yourself a wide buffer to allow for uncertainty when managing this complex problem.  

Swan Range
Click here to see the full advisory for 2017-12-27
December 27, 2017 at 7:05

It has been a week since our major storm and avalanche cycle, and the snowpack is gradually adjusting.  Although the likelihood of triggering a persistent slab avalanche has significantly decreased, the consequences of triggering one of these avalanches remains large and deadly.  Carefully assess the snowpack and give yourself a wide buffer to allow for uncertainty when managing this complex problem.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-27
December 27, 2017 at 7:05

It has been a week since our major storm and avalanche cycle, and the snowpack is gradually adjusting.  Although the likelihood of triggering a persistent slab avalanche has significantly decreased, the consequences of triggering one of these avalanches remains large and deadly.  Carefully assess the snowpack and give yourself a wide buffer to allow for uncertainty when managing this complex problem.  

Whitefish Range
Click here to see the full advisory for 2017-12-26
December 26, 2017 at 6:16

The likelihood of triggering a persistent slab avalanche continues to slowly decrease under our stable weather pattern, but the expected size remains the same.   Triggering a surprisingly large and deadly avalanche is possible today.  Carefully assess the snowpack and allow for a large margin of error when choosing terrain.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-26
December 26, 2017 at 6:16

The likelihood of triggering a persistent slab avalanche continues to slowly decrease under our stable weather pattern, but the expected size remains the same.   Triggering a surprisingly large and deadly avalanche is possible today.  Carefully assess the snowpack and allow for a large margin of error when choosing terrain.  

Whitefish Range
Click here to see the full advisory for 2017-12-26
December 26, 2017 at 6:16

The likelihood of triggering a persistent slab avalanche continues to slowly decrease under our stable weather pattern, but the expected size remains the same.   Triggering a surprisingly large and deadly avalanche is possible today.  Carefully assess the snowpack and allow for a large margin of error when choosing terrain.  

Swan Range
Click here to see the full advisory for 2017-12-25
December 25, 2017 at 6:53

Despite recent benign weather our snowpack structure remains weak with human triggered slides possible resulting in large and destructive avalanches. The best holiday gift to a friend and loved one is careful evaluation of snow structure and terrain while dealing with this complex Persistent Slab problem.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-25
December 25, 2017 at 6:53

Despite recent benign weather our snowpack structure remains weak with human triggered slides possible resulting in large and destructive avalanches. The best holiday gift to a friend and loved one is careful evaluation of snow structure and terrain while dealing with this complex Persistent Slab problem.

Whitefish Range
Click here to see the full advisory for 2017-12-25
December 25, 2017 at 6:53

Despite recent benign weather our snowpack structure remains weak with human triggered slides possible resulting in large and destructive avalanches. The best holiday gift to a friend and loved one is careful evaluation of snow structure and terrain while dealing with this complex Persistent Slab problem.

Swan Range
Click here to see the full advisory for 2017-12-24
December 24, 2017 at 6:58

Recent dry weather has helped our snowpack adjust to the substantial load deposited earlier in the week. Unfortunately, a weak snowpack structure remains with human triggered slides possible resulting in large and destructive avalanches. Given the serious consequences of triggering a Persistent Slab, carefully evaluate the snow structure and terrain.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-24
December 24, 2017 at 6:58

Recent dry weather has helped our snowpack adjust to the substantial load deposited earlier in the week. Unfortunately, a weak snowpack structure remains with human triggered slides possible resulting in large and destructive avalanches. Given the serious consequences of triggering a Persistent Slab, carefully evaluate the snow structure and terrain.

Whitefish Range
Click here to see the full advisory for 2017-12-24
December 24, 2017 at 6:58

Recent dry weather has helped our snowpack adjust to the substantial load deposited earlier in the week. Unfortunately, a weak snowpack structure remains with human triggered slides possible resulting in large and destructive avalanches. Given the serious consequences of triggering a Persistent Slab, carefully evaluate the snow structure and terrain.

Swan Range
Click here to see the full advisory for 2017-12-23
December 23, 2017 at 7:08

Storms over the past week have deposited substantial snow onto a weak fragile snowpack creating dangerous avalanche conditions. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Fresh windslabs have returned and have the potential of triggering larger persistent slabs.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-23
December 23, 2017 at 7:08

Storms over the past week have deposited substantial snow onto a weak fragile snowpack creating dangerous avalanche conditions. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Fresh windslabs have returned and have the potential of triggering larger persistent slabs.

Swan Range
Click here to see the full advisory for 2017-12-23
December 23, 2017 at 6:46

Storms over the past week have deposited substantial snow onto a weak fragile snowpack creating dangerous avalanche conditions. Large and destructive human triggered slab avalanches are a serious concern on slopes greater than 30 degrees. Fresh windslabs have returned and have the potential of triggering larger persistent slabs.

Whitefish Range
Click here to see the full advisory for 2017-12-22
December 22, 2017 at 7:04

Dangerous avalanche conditions exist as additional snowfall overnight added more stress to an already fragile snowpack. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Heads up for loose dry avalanches running fast and far in steeper terrain with the potential of triggering persistent slabs.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-22
December 22, 2017 at 7:04

Dangerous avalanche conditions exist as additional snowfall overnight added more stress to an already fragile snowpack. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Heads up for loose dry avalanches running fast and far in steeper terrain with the potential of triggering persistent slabs.

Whitefish Range
Click here to see the full advisory for 2017-12-22
December 22, 2017 at 7:04

Dangerous avalanche conditions exist as additional snowfall overnight added more stress to an already fragile snowpack. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Heads up for loose dry avalanches running fast and far in steeper terrain with the potential of triggering persistent slabs.

Swan Range
Click here to see the full advisory for 2017-12-21
December 21, 2017 at 7:01

Dangerous avalanche conditions continue after a potent storm system brought 2 to 3 feet of dense snow and a widespread natural avalanche cycle through Tuesday night. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Have patience and discipline allowing buried persistent weak layers to adjust to this exceptionally large and rapid loading event.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-21
December 21, 2017 at 7:01

Dangerous avalanche conditions continue after a potent storm system brought 2 to 3 feet of dense snow and a widespread natural avalanche cycle through Tuesday night. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Have patience and discipline allowing buried persistent weak layers to adjust to this exceptionally large and rapid loading event.

Whitefish Range
Click here to see the full advisory for 2017-12-21
December 21, 2017 at 7:01

Dangerous avalanche conditions continue after a potent storm system brought 2 to 3 feet of dense snow and a widespread natural avalanche cycle through Tuesday night. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Have patience and discipline allowing buried persistent weak layers to adjust to this exceptionally large and rapid loading event.

Swan Range
Click here to see the full advisory for 2017-12-20
December 20, 2017 at 22:00

Dangerous avalanche conditions continue after a potent storm system brought 2 to 3 feet of dense snow and a widespread natural avalanche cycle through Tuesday night. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Have patience and discipline allowing buried persistent weak layers to adjust to this exceptionally large and rapid loading event.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-20
December 20, 2017 at 22:00

Dangerous avalanche conditions continue after a potent storm system brought 2 to 3 feet of dense snow and a widespread natural avalanche cycle through Tuesday night. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Have patience and discipline allowing buried persistent weak layers to adjust to this exceptionally large and rapid loading event.

Whitefish Range
Click here to see the full advisory for 2017-12-20
December 20, 2017 at 22:00

Dangerous avalanche conditions continue after a potent storm system brought 2 to 3 feet of dense snow and a widespread natural avalanche cycle through Tuesday night. Large and destructive human triggered slab avalanches are likely on slopes greater than 30 degrees. Have patience and discipline allowing buried persistent weak layers to adjust to this exceptionally large and rapid loading event.

Swan Range
Click here to see the full advisory for 2017-12-20
December 20, 2017 at 7:10

Avalanche conditions remain dangerous in the wake of a significant storm and avalanche cycle that peaked last night. In the past two days, 2 to 3 feet of snow and gusty winds have overloaded buried weak layers.  Large and destructive slab avalanches will be easy to trigger on slopes steeper than 30 degrees, and natural avalanches that run through all elevation bands are possible. Patience and conservative terrain selection with an eye for overhead hazards are your silver bullets today. 

Whitefish Range
Click here to see the full advisory for 2017-12-20
December 20, 2017 at 7:10

Avalanche conditions remain dangerous in the wake of a significant storm and avalanche cycle that peaked last night. In the past two days, 2 to 3 feet of snow and gusty winds have overloaded buried weak layers.  Large and destructive slab avalanches will be easy to trigger on slopes steeper than 30 degrees, and natural avalanches that run through all elevation bands are possible. Patience and conservative terrain selection with an eye for overhead hazards are your silver bullets today. 

Swan Range
Click here to see the full advisory for 2017-12-20
December 20, 2017 at 7:10

Avalanche conditions remain dangerous in the wake of a significant storm and avalanche cycle that peaked last night. In the past two days, 2 to 3 feet of snow and gusty winds have overloaded buried weak layers.  Large and destructive slab avalanches will be easy to trigger on slopes steeper than 30 degrees, and natural avalanches that run through all elevation bands are possible. Patience and conservative terrain selection with an eye for overhead hazards are your silver bullets today. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-12-19
December 19, 2017 at 6:44

An AVALANCHE WARNING is in effect and the danger will rise to HIGH.  Heavy snowfall will be overloading a weak and fragile snowpack, and a large and widespread avalanche cycle is expected later today and tonight.  Very dangerous avalanche conditions exist: travel in and below avalanche terrain is not recommended.

Whitefish Range
Click here to see the full advisory for 2017-12-19
December 19, 2017 at 6:44

An AVALANCHE WARNING is in effect and the danger will rise to HIGH.  Heavy snowfall will be overloading a weak and fragile snowpack, and a large and widespread avalanche cycle is expected later today and tonight.  Very dangerous avalanche conditions exist: travel in and below avalanche terrain is not recommended.

Swan Range

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