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., Tuesday, June 27, 2017
E.g., Tuesday, June 27, 2017
E.g., Tuesday, June 27, 2017
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2017-02-20
February 20, 2017 at 6:55

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and wind formed fresh wind slabs at upper elevations. Lingering storm slab instability should be expected in areas favored by our last storm. In some locations both wind and storm slabs formed on a crust adding to their instability. Evaluate all wind loaded terrain, along with areas that received more recent snowfall, before committing to a slope. The danger below 6000 feet is LOW.

Whitefish Range
Click here to see the full advisory for 2017-02-20
February 20, 2017 at 6:55

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and wind formed fresh wind slabs at upper elevations. Lingering storm slab instability should be expected in areas favored by our last storm. In some locations both wind and storm slabs formed on a crust adding to their instability. Evaluate all wind loaded terrain, along with areas that received more recent snowfall, before committing to a slope. The danger below 6000 feet is LOW.

Swan Range
Click here to see the full advisory for 2017-02-20
February 20, 2017 at 6:55

The avalanche danger is MODERATE above 6000 feet where human triggered avalanches remain possible. Recent snowfall and wind formed fresh wind slabs at upper elevations. Lingering storm slab instability should be expected in areas favored by our last storm. In some locations both wind and storm slabs formed on a crust adding to their instability. Evaluate all wind loaded terrain, along with areas that received more recent snowfall, before committing to a slope. The danger below 6000 feet is LOW.

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-19
February 19, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. New snow overnight, combined with wind, has formed fresh wind slabs and added weight to existing slabs. In areas of favored snowfall storm slabs should be expected. In some locations these slabs are being deposited onto a crust. Below 5000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Whitefish Range
Click here to see the full advisory for 2017-02-19
February 19, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. New snow overnight, combined with wind, has formed fresh wind slabs and added weight to existing slabs. In areas of favored snowfall storm slabs should be expected. In some locations these slabs are being deposited onto a crust. Below 5000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Swan Range
Click here to see the full advisory for 2017-02-19
February 19, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. New snow overnight, combined with wind, has formed fresh wind slabs and added weight to existing slabs. In areas of favored snowfall storm slabs should be expected. In some locations these slabs are being deposited onto a crust. Below 5000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-18
February 18, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. Recent snow and wind has formed fresh wind slabs on leeward aspects at upper elevation locations, particularly in the alpine terrain.  Below 6000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Whitefish Range
Click here to see the full advisory for 2017-02-18
February 18, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. Recent snow and wind has formed fresh wind slabs on leeward aspects at upper elevation locations, particularly in the alpine terrain.  Below 6000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Swan Range
Click here to see the full advisory for 2017-02-18
February 18, 2017 at 6:53

The avalanche danger is MODERATE above 6000 feet. Recent snow and wind has formed fresh wind slabs on leeward aspects at upper elevation locations, particularly in the alpine terrain.  Below 6000 feet the wet loose avalanche danger may rise throughout the day with warming temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-17
February 17, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Temperatures have dropped below freezing above 6000 feet and 3-7 inches of snow overnight combined with west-southwest winds have likely formed fresh wind slabs. Below 6000 feet, wet loose avalanches remain possible thanks to the rain and above-freezing temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Whitefish Range
Click here to see the full advisory for 2017-02-17
February 17, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Temperatures have dropped below freezing above 6000 feet and 3-7 inches of snow overnight combined with west-southwest winds have likely formed fresh wind slabs. Below 6000 feet, wet loose avalanches remain possible thanks to the rain and above-freezing temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Swan Range
Click here to see the full advisory for 2017-02-17
February 17, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Temperatures have dropped below freezing above 6000 feet and 3-7 inches of snow overnight combined with west-southwest winds have likely formed fresh wind slabs. Below 6000 feet, wet loose avalanches remain possible thanks to the rain and above-freezing temperatures. Pay attention to changing conditions and evaluate the snowpack and your terrain choices carefully.

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-16
February 16, 2017 at 7:00

The avalanche danger is CONSIDERABLE above 6000 feet and MODERATE below this. Tropical moisture in the form of rain has entered the area.  The snow surface is already saturated in places due to 48 hours of above freezing temperatures at mid- and upper elevations.  The strong rain crust is breaking down in places and it is possible to have wet loose avalanches or trigger an avalanche on an older persistent weak layer or wind loaded slope. 

 

Whitefish Range
Click here to see the full advisory for 2017-02-16
February 16, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Tropical moisture in the form of rain has entered the area.  The snow surface is already saturated in places due to 48 hours of above freezing temperatures at mid and upper elevations.  The strong rain crust is breaking down in places and it is possible to have wet loose avalanches or trigger an avalanche on an older persistent weak layer or wind loaded slope. 

 

Swan Range
Click here to see the full advisory for 2017-02-16
February 16, 2017 at 7:00

The avalanche danger is MODERATE at all elevations today. Tropical moisture in the form of rain has entered the area.  The snow surface is already saturated in places due to 48 hours of above freezing temperatures at mid and upper elevations.  The strong rain crust is breaking down in places and it is possible to have wet loose avalanches or trigger an avalanche on an older persistent weak layer or wind loaded slope. 

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-15
February 15, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet and LOW below this. The rain crust is key to determining stability right now.  Where it is present it will increase stability.  Where it isn't found or is breaking down, it is possible to trigger an avalanche on an older persistent weak layer or wind loaded slopes. Today's potential above-freezing temperatures and abundant sunshine may increase the avalanche danger. Pay attention to these changing conditions and adjust travel plans accordingly.

 

Whitefish Range
Click here to see the full advisory for 2017-02-15
February 15, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet and LOW below this. The rain crust is key to determining stability right now.  Where it is present it will increase stability.  Where it isn't found or is breaking down, it is possible to trigger an avalanche on an older persistent weak layer or wind loaded slopes. Today's potential above-freezing temperatures and abundant sunshine may increase the avalanche danger. Pay attention to these changing conditions and adjust travel plans accordingly.

 

Swan Range
Click here to see the full advisory for 2017-02-15
February 15, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet and LOW below this. The rain crust is key to determining stability right now.  Where it is present it will increase stability.  Where it isn't found or is breaking down, it is possible to trigger an avalanche on an older persistent weak layer or wind loaded slopes. Today's potential above-freezing temperatures and abundant sunshine may increase the avalanche danger. Pay attention to these changing conditions and adjust travel plans accordingly.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-14
February 14, 2017 at 7:00

The avalanche danger is MODERATE above 5000 feet and LOW below this. Wind slabs formed over the past weekend need time to stabilize. You are more likely to trigger a wind slab avalanche in alpine terrain, but be cautious of all wind-loaded slopes. It is also possible to trigger an avalanche on an older persistent weak layer. Today's potential above-freezing temperatures and abundant sunshine may increase the avalanche danger. Pay attention to these changing conditions and adjust travel plans accordingly.

 

Whitefish Range
Click here to see the full advisory for 2017-02-14
February 14, 2017 at 7:00

The avalanche danger is MODERATE above 5000 feet and LOW below this. Wind slabs formed over the past weekend need time to stabilize. You are more likely to trigger a wind slab avalanche in alpine terrain, but be cautious of all wind-loaded slopes. It is also possible to trigger an avalanche on an older persistent weak layer. Today's potential above-freezing temperatures and abundant sunshine may increase the avalanche danger. Pay attention to these changing conditions and adjust travel plans accordingly.

 

Swan Range
Click here to see the full advisory for 2017-02-14
February 14, 2017 at 7:00

The avalanche danger is MODERATE above 5000 feet and LOW below this. Wind slabs formed over the past weekend need time to stabilize. You are more likely to trigger a wind slab avalanche in alpine terrain, but be cautious of all wind-loaded slopes. It is also possible to trigger an avalanche on an older persistent weak layer. Today's potential above-freezing temperatures and abundant sunshine may increase the avalanche danger. Pay attention to these changing conditions and adjust travel plans accordingly.

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-13
February 13, 2017 at 6:31

Fresh wind slabs continue to form and thicken above Thursday's rain line. Our weak snowpack structure is now capped by a thick slab deposited during last weeks strong storms. The avalanche danger is CONSIDERABLE above 6000 feet and MODERATE below. Triggering a wind slab avalanche today is likely and it is possible to trigger an avalanche on a buried weak layer at all elevations. Conservative decision-making remains essential on all aspects

 

Whitefish Range
Click here to see the full advisory for 2017-02-13
February 13, 2017 at 6:31

Fresh wind slabs continue to form and thicken above Thursday's rain line. Our weak snowpack structure is now capped by a thick slab deposited during last weeks strong storms. The avalanche danger is CONSIDERABLE above 6000 feet and MODERATE below. Triggering a wind slab avalanche today is likely and it is possible to trigger an avalanche on a buried weak layer at all elevations. Conservative decision-making remains essential on all aspects

 

Swan Range
Click here to see the full advisory for 2017-02-13
February 13, 2017 at 6:31

Fresh wind slabs continue to form and thicken above Thursday's rain line. Our weak snowpack structure is now capped by a thick slab deposited during last weeks strong storms. The avalanche danger is CONSIDERABLE above 6000 feet and MODERATE below. Triggering a wind slab avalanche today is likely and it is possible to trigger an avalanche on a buried weak layer at all elevations. Conservative decision-making remains essential on all aspects

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-12
February 12, 2017 at 6:49

Moderate to strong winds over the past 48 hours have formed fresh wind slabs, especially in the alpine. Storms over the past week have deposited a thick slab on top of a weak snowpack structure. The avalanche danger is CONSIDERABLE above 6000 feet. You are likely to trigger a wind slab avalanche today and it is possible to trigger an avalanche on a buried weak layer at all elevations. Conservative decision-making remains essential on all aspects

 

Whitefish Range
Click here to see the full advisory for 2017-02-12
February 12, 2017 at 6:49

Moderate to strong winds over the past 48 hours have formed fresh wind slabs, especially in the alpine. Storms over the past week have deposited a thick slab on top of a weak snowpack structure. The avalanche danger is CONSIDERABLE above 6000 feet. You are likely to trigger a wind slab avalanche today and it is possible to trigger an avalanche on a buried weak layer at all elevations. Conservative decision-making remains essential on all aspects

 

Swan Range
Click here to see the full advisory for 2017-02-12
February 12, 2017 at 6:49

Moderate to strong winds over the past 48 hours have formed fresh wind slabs, especially in the alpine. Storms over the past week have deposited a thick slab on top of a weak snowpack structure. The avalanche danger is CONSIDERABLE above 6000 feet. You are likely to trigger a wind slab avalanche today and it is possible to trigger an avalanche on a buried weak layer at all elevations. Conservative decision-making remains essential on all aspects

 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-02-11
February 11, 2017 at 6:32

Strong winds overnight continue to form and thicken wind slabs, especially in the alpine. Recent heavy precipitation and fluctuating temperatures have stressed our weak snowpack structure. The avalanche danger is CONSIDERABLE above 5000 feet. You are likely to trigger a wind slab avalanche today and it is possible to trigger an avalanche on a buried weak layer. Conservative decision-making remains essential on all aspects

 

Whitefish Range
Click here to see the full advisory for 2017-02-11
February 11, 2017 at 6:32

Strong winds overnight continue to form and thicken wind slabs, especially in the alpine. Recent heavy precipitation and fluctuating temperatures have stressed our weak snowpack structure. The avalanche danger is CONSIDERABLE above 5000 feet. You are likely to trigger a wind slab avalanche today and it is possible to trigger an avalanche on a buried weak layer. Conservative decision-making remains essential on all aspects

 

Swan Range
Click here to see the full advisory for 2017-02-11
February 11, 2017 at 6:32

Strong winds overnight continue to form and thicken wind slabs, especially in the alpine. Recent heavy precipitation and fluctuating temperatures have stressed our weak snowpack structure. The avalanche danger is CONSIDERABLE above 5000 feet. You are likely to trigger a wind slab avalanche today and it is possible to trigger an avalanche on a buried weak layer. Conservative decision-making remains essential on all aspects

 

Flathead Range and southern Glacier National Park

Pages

CSV