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., Monday, July 24, 2017
E.g., Monday, July 24, 2017
E.g., Monday, July 24, 2017
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2017-02-10
February 10, 2017 at 7:00

Very dangerous avalanche conditions exist. Heavy precipitation combined with strong winds and relatively warm temperatures over the past 24 hours created an unstable snow pack. The avalanche danger is HIGH above 6000 feet and CONSIDERABLE below. Avoid avalanche terrain in the upper elevations and exposure to run-out zones of avalanche paths that reach into the alpine.  Conservative decision-making remains essential in low to mid elevations due to the continued possibility for large, natural avalanches. 

 

Whitefish Range
Click here to see the full advisory for 2017-02-10
February 10, 2017 at 7:00

Very dangerous avalanche conditions exist. Heavy precipitation combined with strong winds and relatively warm temperatures over the past 24 hours created an unstable snow pack. The avalanche danger is HIGH above 6000 feet and CONSIDERABLE below. Avoid avalanche terrain in the upper elevations and exposure to run-out zones of avalanche paths that reach into the alpine.  Conservative decision-making remains essential in low to mid elevations due to the continued possibility for large, natural avalanches. 

 

Swan Range
Click here to see the full advisory for 2017-02-10
February 10, 2017 at 7:00

Very dangerous avalanche conditions exist. Heavy precipitation combined with strong winds and relatively warm temperatures over the past 24 hours created an unstable snow pack. The avalanche danger is HIGH above 6000 feet and CONSIDERABLE below. Avoid avalanche terrain in the upper elevations and exposure to run-out zones of avalanche paths that reach into the alpine.  Conservative decision-making remains essential in low to mid elevations due to the continued possibility for large, natural avalanches. 

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-09
February 9, 2017 at 7:00

An AVALANCHE WARNING is in effect. A relatively warm, wet system moved into the area late yesterday and brought substantial precipitation to the mountains. Today should see strong winds, continued heavy rain/snow, and warming temperatures that will likely tip the scale on a snowpack that was still recovering from last weekend's enormous stress. Natural and human triggered avalanches are likely. The avalanche danger is HIGH, travel in avalanche terrain and run-out zones is not recommended.

Whitefish Range
Click here to see the full advisory for 2017-02-09
February 9, 2017 at 7:00

An AVALANCHE WARNING is in effect. A relatively warm, wet system moved into the area late yesterday and brought substantial precipitation to the mountains. Today should see strong winds, continued heavy rain/snow, and warming temperatures that will likely tip the scale on a snowpack that was still recovering from last weekend's enormous stress. Natural and human triggered avalanches are likely. The avalanche danger is HIGH, travel in avalanche terrain and run-out zones is not recommended.

Swan Range
Click here to see the full advisory for 2017-02-09
February 9, 2017 at 7:00

An AVALANCHE WARNING is in effect. A relatively warm, wet system moved into the area late yesterday and brought substantial precipitation to the mountains. Today should see strong winds, continued heavy rain/snow, and warming temperatures that will likely tip the scale on a snowpack that was still recovering from last weekend's enormous stress. Natural and human triggered avalanches are likely. The avalanche danger is HIGH, travel in avalanche terrain and run-out zones is not recommended.

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-08
February 8, 2017 at 7:00

The widespread natural avalanche cycle has slowed, but human triggered avalanches are still likely and natural avalanches are possible. The storm ended Monday and the new snow has had a little time to strengthen, but it still sits on a weak snowpack and instabilities associated with the storm are lingering. Careful snowpack evaluation, cautious route-finding and conservative decision-making are essential. The danger is CONSIDERABLE at all elevations today.

 

Whitefish Range
Click here to see the full advisory for 2017-02-08
February 8, 2017 at 7:00

The widespread natural avalanche cycle has slowed, but human triggered avalanches are still likely and natural avalanches are possible. The storm ended Monday and the new snow has had a little time to strengthen, but it still sits on a weak snowpack and instabilities associated with the storm are lingering. Careful snowpack evaluation, cautious route-finding and conservative decision-making are essential. The danger is CONSIDERABLE at all elevations today.

 

Swan Range
Click here to see the full advisory for 2017-02-08
February 8, 2017 at 7:00

The widespread natural avalanche cycle has slowed, but human triggered avalanches are still likely and natural avalanches are possible. The storm ended Monday and the new snow has had a little time to strengthen, but it still sits on a weak snowpack and instabilities associated with the storm are lingering. Careful snowpack evaluation, cautious route-finding and conservative decision-making are essential. The danger is CONSIDERABLE at all elevations today.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-07
February 7, 2017 at 6:57

Very dangerous avalanche conditions exist. The storm dropped up to 4.5 inches of SWE (over 50 inches of snow) in some locations since Friday onto a weak snowpack. A widespread natural avalanche cycle occurred over the past 48 hours. While the storm tapered yesterday afternoon, the snowpack needs time to adjust to this new load. Travel in avalanche terrain and run-out zones is not recommended. The danger is High above 6000 feet today. See other ranges here

 

Whitefish Range
Click here to see the full advisory for 2017-02-07
February 7, 2017 at 6:45

An AVALANCHE WARNING was extended today. Large, natural avalanches were reported as recently as last night. The storm dropped up to 4.5 inches of SWE (over 50 inches of snow) in some locations since Friday onto a weak snowpack. While the storm tapered yesterday afternoon, the snowpack needs time to adjust to this new load. Travel in avalanche terrain and run-out zones is not recommended. The danger is High above 5000 feet today. See Whitefish Range here.

 

Swan Range
Click here to see the full advisory for 2017-02-07
February 7, 2017 at 6:45

An AVALANCHE WARNING was extended today. Large, natural avalanches were reported as recently as last night. The storm dropped up to 4.5 inches of SWE (over 50 inches of snow) in some locations since Friday onto a weak snowpack. While the storm tapered yesterday afternoon, the snowpack needs time to adjust to this new load. Travel in avalanche terrain and run-out zones is not recommended. The danger is High above 5000 feet today. See Whitefish Range here.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-06
February 6, 2017 at 7:08

AVALANCHE WARNING IN EFFECT. The avalanche danger is EXTREME at upper elevations. The current storm has added over 3" of water to a snowpack that consists of a variety of weak layers. Both natural and human triggered avalanches are certain. Avoid all avalanche terrain. Stay off of and out from underneath slopes steeper than 30 degrees. Avalanches may run long distances and can reach into mature forests.

 

Whitefish Range
Click here to see the full advisory for 2017-02-06
February 6, 2017 at 7:08

AVALANCHE WARNING IN EFFECT. The avalanche danger is EXTREME at upper elevations. The current storm has added over 3" of water to a snowpack that consists of a variety of weak layers. Both natural and human triggered avalanches are certain. Avoid all avalanche terrain. Stay off of and out from underneath slopes steeper than 30 degrees. Avalanches may run long distances and can reach into mature forests.

 

Swan Range
Click here to see the full advisory for 2017-02-06
February 6, 2017 at 7:08

AVALANCHE WARNING IN EFFECT. The avalanche danger is EXTREME at upper elevations. The current storm has added over 3" of water to a snowpack that consists of a variety of weak layers. Both natural and human triggered avalanches are certain. Avoid all avalanche terrain. Stay off of and out from underneath slopes steeper than 30 degrees. Avalanches may run long distances and can reach into mature forests.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-05
February 5, 2017 at 7:00

AVALANCHE WARNING IN EFFECT. The avalanche danger is HIGH. The current storm has added substantial weight to a snowpack that consists of a variety of weak layers. Both natural and human triggered avalanches are likely. Travel in avalanche terrain is not recommended. Stay off of and out from underneath slopes steeper than 30 degrees. Avalanches may run long distances and can reach into mature forests.

 

Whitefish Range
Click here to see the full advisory for 2017-02-05
February 5, 2017 at 7:00

AVALANCHE WARNING IN EFFECT. The avalanche danger is HIGH. The current storm has added substantial weight to a snowpack that consists of a variety of weak layers. Both natural and human triggered avalanches are likely. Travel in avalanche terrain is not recommended. Stay off of and out from underneath slopes steeper than 30 degrees. Avalanches may run long distances and can reach into mature forests.

 

Swan Range
Click here to see the full advisory for 2017-02-05
February 5, 2017 at 7:00

AVALANCHE WARNING IN EFFECT. The avalanche danger is HIGH. The current storm has added substantial weight to a snowpack that consists of a variety of weak layers. Both natural and human triggered avalanches are likely. Travel in avalanche terrain is not recommended. Stay off of and out from underneath slopes steeper than 30 degrees. Avalanches may run long distances and can reach into mature forests.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-04
February 4, 2017 at 7:00

Dangerous avalanche conditions exist! Substantial snow has fallen at all elevations onto a weak snowpack structure. Variable wind direction has and will continue to form fresh wind slabs on all aspects. The avalanche danger is HIGH above 6000 feet. Natural avalanches are likely and human triggered avalanches are very likely. Travel in avalanche terrain is not recommended.

 

Whitefish Range
Click here to see the full advisory for 2017-02-04
February 4, 2017 at 7:00

Dangerous avalanche conditions exist! Substantial snow has fallen at all elevations onto a weak snowpack structure. Variable wind direction has and will continue to form fresh wind slabs on all aspects. The avalanche danger is HIGH above 6000 feet. Natural avalanches are likely and human triggered avalanches are very likely. Travel in avalanche terrain is not recommended.

 

Swan Range
Click here to see the full advisory for 2017-02-04
February 4, 2017 at 7:00

Dangerous avalanche conditions exist! Substantial snow has fallen at all elevations onto a weak snowpack structure. Variable wind direction has and will continue to form fresh wind slabs on all aspects. The avalanche danger is HIGH above 6000 feet. Natural avalanches are likely and human triggered avalanches are very likely. Travel in avalanche terrain is not recommended.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-03
February 3, 2017 at 6:36

Today is a weather transition day as a wet and relatively warm system approaches the region. The avalanche danger is MODERATE above 6000 feet, but will rise tonight as the storm intensifies. New snow expected during day light hours should not affect stability, but pay close attention to changing weather conditions. New, thin wind slabs will form as the day progresses and a few inches of new snow will make it difficult to identify older slabs where lingering instability exists.

 

Whitefish Range
Click here to see the full advisory for 2017-02-03
February 3, 2017 at 6:36

Today is a weather transition day as a wet and relatively warm system approaches the region. The avalanche danger is MODERATE above 6000 feet, but will rise tonight as the storm intensifies. New snow expected during day light hours should not affect stability, but pay close attention to changing weather conditions. New, thin wind slabs will form as the day progresses and a few inches of new snow will make it difficult to identify older slabs where lingering instability exists.

 

Swan Range
Click here to see the full advisory for 2017-02-03
February 3, 2017 at 6:36

Today is a weather transition day as a wet and relatively warm system approaches the region. The avalanche danger is MODERATE above 6000 feet, but will rise tonight as the storm intensifies. New snow expected during day light hours should not affect stability, but pay close attention to changing weather conditions. New, thin wind slabs will form as the day progresses and a few inches of new snow will make it difficult to identify older slabs where lingering instability exists.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-02
February 2, 2017 at 7:00

Several generations of wind slabs formed on multiple aspects over the past week. In some areas these slabs remain sensitive to human triggers. Wind loaded areas should be treated with respect given the variety of surfaces they formed on. The avalanche danger is MODERATE above 6000 feet and LOW below 6000 feet. Identify recently wind loaded slopes and avoid steep, exposed terrain where these slabs exist.

Whitefish Range
Click here to see the full advisory for 2017-02-02
February 2, 2017 at 7:00

Several generations of wind slabs formed on multiple aspects over the past week. In some areas these slabs remain sensitive to human triggers. Wind loaded areas should be treated with respect given the variety of surfaces they formed on. The avalanche danger is MODERATE above 6000 feet and LOW below 6000 feet. Identify recently wind loaded slopes and avoid steep, exposed terrain where these slabs exist.

Swan Range
Click here to see the full advisory for 2017-02-02
February 2, 2017 at 7:00

Several generations of wind slabs formed on multiple aspects over the past week. In some areas these slabs remain sensitive to human triggers. Wind loaded areas should be treated with respect given the variety of surfaces they formed on. The avalanche danger is MODERATE above 6000 feet and LOW below 6000 feet. Identify recently wind loaded slopes and avoid steep, exposed terrain where these slabs exist.

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-01
February 1, 2017 at 7:00

We were missed by the latest storm.  The avalanche danger is MODERATE above 6000 feet. Shifting winds continue to drift snow onto leeward aspects forming fresh wind slabs and putting additional weight onto existing slabs. In some locations these slabs are being deposited on top of a rain crust. Buried weak layers still exist and remain a concern. Choose conservative terrain in areas where you find a weak snowpack structure. 

Whitefish Range
Click here to see the full advisory for 2017-02-01
February 1, 2017 at 7:00

We were missed by the latest storm.  The avalanche danger is MODERATE above 6000 feet. Shifting winds continue to drift snow onto leeward aspects forming fresh wind slabs and putting additional weight onto existing slabs. In some locations these slabs are being deposited on top of a rain crust. Buried weak layers still exist and remain a concern. Choose conservative terrain in areas where you find a weak snowpack structure. 

Swan Range
Click here to see the full advisory for 2017-02-01
February 1, 2017 at 7:00

We were missed by the latest storm.  The avalanche danger is MODERATE above 6000 feet. Shifting winds continue to drift snow onto leeward aspects forming fresh wind slabs and putting additional weight onto existing slabs. In some locations these slabs are being deposited on top of a rain crust. Buried weak layers still exist and remain a concern. Choose conservative terrain in areas where you find a weak snowpack structure. 

Flathead Range and southern Glacier National Park

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