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., Thursday, April 26, 2018
E.g., Thursday, April 26, 2018
E.g., Thursday, April 26, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2018-03-03
March 3, 2018 at 7:05

Yesterday's storm was intense but short-lived. Thin storm slabs formed on all aspects but will be thickest below ridgelines. Loose snow slides may be human triggered on steep slopes or initiate naturally with prolonged solar input. Evaluate the bonding of new snow to the old snow surface. Cracking under your feet or machine is an obvious sign of instability. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-03-03
March 3, 2018 at 7:05

Yesterday's storm was intense but short-lived. Thin storm slabs formed on all aspects but will be thickest below ridgelines. Loose snow slides may be human triggered on steep slopes or initiate naturally with prolonged solar input. Evaluate the bonding of new snow to the old snow surface. Cracking under your feet or machine is an obvious sign of instability. 

Whitefish Range
Click here to see the full advisory for 2018-03-03
March 3, 2018 at 7:05

Yesterday's storm was intense but short-lived. Thin storm slabs formed on all aspects but will be thickest below ridgelines. Loose snow slides may be human triggered on steep slopes or initiate naturally with prolonged solar input. Evaluate the bonding of new snow to the old snow surface. Cracking under your feet or machine is an obvious sign of instability. 

Swan Range
Click here to see the full advisory for 2018-03-02
March 2, 2018 at 6:58

The avalanche danger is MODERATE today but may rise to CONSIDERABLE later today if snowfall amounts are higher than forecasted. Changing conditions may develop with increasing snowfall intensity and wind loading. Evaluate storm totals and bonding of new snow to the old snow surface. Cracking in the snow surface is a signs of storm slab instability. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-03-02
March 2, 2018 at 6:58

The avalanche danger is MODERATE today but may rise to CONSIDERABLE later today if snowfall amounts are higher than forecasted. Changing conditions may develop with increasing snowfall intensity and wind loading. Evaluate storm totals and bonding of new snow to the old snow surface. Cracking in the snow surface is a signs of storm slab instability. 

Whitefish Range
Click here to see the full advisory for 2018-03-02
March 2, 2018 at 6:58

The avalanche danger is MODERATE today but may rise to CONSIDERABLE later today if snowfall amounts are higher than forecasted. Changing conditions may develop with increasing snowfall intensity and wind loading. Evaluate storm totals and bonding of new snow to the old snow surface. Cracking in the snow surface is a signs of storm slab instability. 

Swan Range
Click here to see the full advisory for 2018-03-01
March 1, 2018 at 7:22

Increasing temperatures at lower elevations will make loose wet avalanches possible today. Look for roller balls, pinwheels, or tree bombs to identify warming conditions. Relatively low density, cohesionless snow exist at mid and upper elevations where sluffing is possible on slopes greater than 35 degrees.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-03-01
March 1, 2018 at 7:22

Increasing temperatures at lower elevations will make loose wet avalanches possible today. Look for roller balls, pinwheels, or tree bombs to identify warming conditions. Relatively low density, cohesionless snow exist at mid and upper elevations where sluffing is possible on slopes greater than 35 degrees.

Whitefish Range
Click here to see the full advisory for 2018-03-01
March 1, 2018 at 7:22

Increasing temperatures at lower elevations will make loose wet avalanches possible today. Look for roller balls, pinwheels, or tree bombs to identify warming conditions. Relatively low density, cohesionless snow exist at mid and upper elevations where sluffing is possible on slopes greater than 35 degrees.

Swan Range
Click here to see the full advisory for 2018-02-28
February 28, 2018 at 7:01

Backcountry riders have triggered wind slabs or cracking snow in leeward terrain every day this week. Seek out soft, wind-sheltered powder for the safest riding conditions.  

Swan Range
Click here to see the full advisory for 2018-02-28
February 28, 2018 at 7:01

Backcountry riders have triggered wind slabs or cracking snow in leeward terrain every day this week. Seek out soft, wind-sheltered powder for the safest riding conditions.  

Whitefish Range
Click here to see the full advisory for 2018-02-28
February 28, 2018 at 7:00

Backcountry riders have triggered wind slabs or cracking snow in leeward terrain every day this week. Seek out soft, wind-sheltered powder for the safest riding conditions.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-27
February 27, 2018 at 7:13

The recent snow is most problematic on steep, wind loaded slopes. Be wary of thicker slabs in leeward terrain.

Swan Range
Click here to see the full advisory for 2018-02-27
February 27, 2018 at 7:13

The recent snow is most problematic on steep, wind loaded slopes. Be wary of thicker slabs in leeward terrain.

Whitefish Range
Click here to see the full advisory for 2018-02-27
February 27, 2018 at 7:11

The recent snow is most problematic on steep, wind loaded slopes. Be wary of thicker slabs in leeward terrain.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-26
February 26, 2018 at 6:58

The recent storm has ended down but the avalanche hazard remains elevated. Fresh wind slabs continue to thicken on leeward and cross-loaded slopes at upper elevations.  Yesterday's relatively dense snow is forming a storm slab problem in sheltered terrain. Watch for signs of instabilities in the new snow and wind-deposited snow such as cracking or collapsing.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-26
February 26, 2018 at 6:58

The recent storm has ended down but the avalanche hazard remains elevated. Fresh wind slabs continue to thicken on leeward and cross-loaded slopes at upper elevations.  Yesterday's relatively dense snow is forming a storm slab problem in sheltered terrain. Watch for signs of instabilities in the new snow and wind-deposited snow such as cracking or collapsing.

Whitefish Range
Click here to see the full advisory for 2018-02-26
February 26, 2018 at 6:58

The recent storm has ended down but the avalanche hazard remains elevated. Fresh wind slabs continue to thicken on leeward and cross-loaded slopes at upper elevations.  Yesterday's relatively dense snow is forming a storm slab problem in sheltered terrain. Watch for signs of instabilities in the new snow and wind-deposited snow such as cracking or collapsing.

Swan Range
Click here to see the full advisory for 2018-02-25
February 25, 2018 at 7:02

The avalanche hazard is increasing with moderate to strong southwest winds forming slabs on leeward aspects. Snow returns this morning and intensifies through the day possibly forming storm slabs in sheltered terrain. Slabs will thicken through the day with continued wind and snow. Watch for signs of instabilities in the new snow and wind-deposited snow such as cracking or collapsing.

Whitefish Range
Click here to see the full advisory for 2018-02-25
February 25, 2018 at 7:02

The avalanche hazard is increasing with moderate to strong southwest winds forming slabs on leeward aspects. Snow returns this morning and intensifies through the day possibly forming storm slabs in sheltered terrain. Slabs will thicken through the day with continued wind and snow. Watch for signs of instabilities in the new snow and wind-deposited snow such as cracking or collapsing.

Swan Range
Click here to see the full advisory for 2018-02-25
February 25, 2018 at 7:02

The avalanche hazard is increasing with moderate to strong southwest winds forming slabs on leeward aspects. Snow returns this morning and intensifies through the day possibly forming storm slabs in sheltered terrain. Slabs will thicken through the day with continued wind and snow. Watch for signs of instabilities in the new snow and wind-deposited snow such as cracking or collapsing.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-24
February 24, 2018 at 7:01

The return of light snow and southwest winds are forming thin storm slabs on a variety of surfaces. Slabs will be thickest and most reactive on leeward aspects at upper elevations. Slides may travel long distances due to the underlying firm bed surface. Use caution while riding above terrain traps and long-running gullies. Surface cracking and collapsing is a sign of a sensitive slab.  

Whitefish Range
Click here to see the full advisory for 2018-02-24
February 24, 2018 at 7:01

The return of light snow and southwest winds are forming thin storm slabs on a variety of surfaces. Slabs will be thickest and most reactive on leeward aspects at upper elevations. Slides may travel long distances due to the underlying firm bed surface. Use caution while riding above terrain traps and long-running gullies. Surface cracking and collapsing is a sign of a sensitive slab.  

Swan Range
Click here to see the full advisory for 2018-02-24
February 24, 2018 at 7:01

The return of light snow and southwest winds are forming thin storm slabs on a variety of surfaces. Slabs will be thickest and most reactive on leeward aspects at upper elevations. Slides may travel long distances due to the underlying firm bed surface. Use caution while riding above terrain traps and long-running gullies. Surface cracking and collapsing is a sign of a sensitive slab.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-23
February 23, 2018 at 7:01

Benign weather is consolidating and strengthening the upper snowpack forming generally safe conditions. Upper elevation wind slabs are identified by shooting cracks or collapses. LOW danger doesn’t mean NO danger. Use safe travel protocols including only exposing one person to a slope at a time.

Whitefish Range
Click here to see the full advisory for 2018-02-23
February 23, 2018 at 7:01

Benign weather is consolidating and strengthening the upper snowpack forming generally safe conditions. Upper elevation wind slabs are identified by shooting cracks or collapses. LOW danger doesn’t mean NO danger. Use safe travel protocols including only exposing one person to a slope at a time.

Swan Range
Click here to see the full advisory for 2018-02-23
February 23, 2018 at 7:01

Benign weather is consolidating and strengthening the upper snowpack forming generally safe conditions. Upper elevation wind slabs are identified by shooting cracks or collapses. LOW danger doesn’t mean NO danger. Use safe travel protocols including only exposing one person to a slope at a time.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-22
February 22, 2018 at 6:59

Continued benign weather is allowing the upper snowpack to consolidate and gain strength. Lingering wind slabs remain a concern on isolated, leeward slopes at upper elevations. Pockets of unstable snow can be identified by shooting cracks or audible collapses. The best riding conditions and safest conditions exist on wind-sheltered slopes.

Whitefish Range
Click here to see the full advisory for 2018-02-22
February 22, 2018 at 6:59

Continued benign weather is allowing the upper snowpack to consolidate and gain strength. Lingering wind slabs remain a concern on isolated, leeward slopes at upper elevations. Pockets of unstable snow can be identified by shooting cracks or audible collapses. The best riding conditions and safest conditions exist on wind-sheltered slopes.

Swan Range
Click here to see the full advisory for 2018-02-22
February 22, 2018 at 6:59

Continued benign weather is allowing the upper snowpack to consolidate and gain strength. Lingering wind slabs remain a concern on isolated, leeward slopes at upper elevations. Pockets of unstable snow can be identified by shooting cracks or audible collapses. The best riding conditions and safest conditions exist on wind-sheltered slopes.

Flathead Range and Glacier National Park

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