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, November 21, 2024
E.g., Thursday, November 21, 2024
E.g., Thursday, November 21, 2024
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2016-03-26
March 26, 2016 at 7:00

Today should be a repeat of last weekend with another sharp transition from winter to spring conditions. Warming temperatures and sun expected today will weaken the surface of nearly 2 feet of recent snow, and increase the likelihood of loose, wet avalanches. The avalanche danger will rise to CONSIDERABLE on sunny slopes above 5000 feet today. In other terrain the danger is MODERATE. Carefully evaluate recently formed wind slabs for lingering instability and give large cornices a wide buffer.

Swan Range
Click here to see the full advisory for 2016-03-25
March 25, 2016 at 6:45

12-15 inches of new snow the past 48 hours combined with strong winds and continued snow today will make human triggered avalanches likely. Wind slabs can be up to 3 feet thick and exist on many aspects due to variable and strong winds. Cautious route finding and careful snowpack evaluation are essential. Also, give large cornices a wide berth. The avalanche danger is CONSIDERABLE above 6000 feet, MODERATE between 5000-6000 feet and LOW below.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-25
March 25, 2016 at 6:45

12-15 inches of new snow the past 48 hours combined with strong winds and continued snow today will make human triggered avalanches likely. Wind slabs can be up to 3 feet thick and exist on many aspects due to variable and strong winds. Cautious route finding and careful snowpack evaluation are essential. Also, give large cornices a wide berth. The avalanche danger is CONSIDERABLE above 6000 feet, MODERATE between 5000-6000 feet and LOW below.

Whitefish Range
Click here to see the full advisory for 2016-03-25
March 25, 2016 at 6:45

12-15 inches of new snow the past 48 hours combined with strong winds and continued snow today will make human triggered avalanches likely. Wind slabs can be up to 3 feet thick and exist on many aspects due to variable and strong winds. Cautious route finding and careful snowpack evaluation are essential. Also, give large cornices a wide berth. The avalanche danger is CONSIDERABLE above 6000 feet, MODERATE between 5000-6000 feet and LOW below.

Swan Range
Click here to see the full advisory for 2016-03-24
March 24, 2016 at 6:55

New snow yesterday combined with more snow and strong winds today will create dangerous avalanche conditions. Cautious route finding and careful snowpack evaluation are essential. Human triggered storm slab and wind slab avalanches are likely. Be cautious of cornices as they get larger with today's wind, and assess weak layers around a crust 1.5 to 3 feet from the surface. The avalanche danger is CONSIDERABLE above 5000 feet and MODERATE below.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-24
March 24, 2016 at 6:55

New snow yesterday combined with more snow and strong winds today will create dangerous avalanche conditions. Cautious route finding and careful snowpack evaluation are essential. Human triggered storm slab and wind slab avalanches are likely. Be cautious of cornices as they get larger with today's wind, and assess weak layers around a crust 1.5 to 3 feet from the surface. The avalanche danger is CONSIDERABLE above 5000 feet and MODERATE below.

Whitefish Range
Click here to see the full advisory for 2016-03-24
March 24, 2016 at 6:55

New snow yesterday combined with more snow and strong winds today will create dangerous avalanche conditions. Cautious route finding and careful snowpack evaluation are essential. Human triggered storm slab and wind slab avalanches are likely. Be cautious of cornices as they get larger with today's wind, and assess weak layers around a crust 1.5 to 3 feet from the surface. The avalanche danger is CONSIDERABLE above 5000 feet and MODERATE below.

Swan Range
Click here to see the full advisory for 2016-03-23
March 23, 2016 at 6:58

Thin fresh wind slabs will continue to form through the day on top of a crust in many locations. Older wind slabs also rest on deeper crusts. Large cornices exist and should be treated as suspect. Weak snow near a series of crusts in the upper snowpack should also be assessed before committing to a slope. The avalanche danger is MODERATE above 6000 feet on steep wind loaded terrain. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-23
March 23, 2016 at 6:58

Thin fresh wind slabs will continue to form through the day on top of a crust in many locations. Older wind slabs also rest on deeper crusts. Large cornices exist and should be treated as suspect. Weak snow near a series of crusts in the upper snowpack should also be assessed before committing to a slope. The avalanche danger is MODERATE above 6000 feet on steep wind loaded terrain. 

Whitefish Range
Click here to see the full advisory for 2016-03-23
March 23, 2016 at 6:58

Thin fresh wind slabs will continue to form through the day on top of a crust in many locations. Older wind slabs also rest on deeper crusts. Large cornices exist and should be treated as suspect. Weak snow near a series of crusts in the upper snowpack should also be assessed before committing to a slope. The avalanche danger is MODERATE above 6000 feet on steep wind loaded terrain. 

Swan Range
Click here to see the full advisory for 2016-03-22
March 22, 2016 at 6:39

Cornices and glide cracks have the potential to fail and trigger wind slabs at upper elevations. Give both cornices and slopes with glide cracks a wide berth today. As snow accumulates today fresh wind slabs may form on top of widespread crusts.  Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope. The avalanche danger is MODERATE above 6000 feet. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-22
March 22, 2016 at 6:39

Cornices and glide cracks have the potential to fail and trigger wind slabs at upper elevations. Give both cornices and slopes with glide cracks a wide berth today. As snow accumulates today fresh wind slabs may form on top of widespread crusts.  Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope. The avalanche danger is MODERATE above 6000 feet. 

Whitefish Range
Click here to see the full advisory for 2016-03-22
March 22, 2016 at 6:39

Cornices and glide cracks have the potential to fail and trigger wind slabs at upper elevations. Give both cornices and slopes with glide cracks a wide berth today. As snow accumulates today fresh wind slabs may form on top of widespread crusts.  Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope. The avalanche danger is MODERATE above 6000 feet. 

Swan Range
Click here to see the full advisory for 2016-03-21
March 21, 2016 at 7:07

The combination of weekend warming, a light refreeze of the surface snow and rain will provide us with another day of wet loose avalanche problems. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible in the moist surface snow on all aspects. Recent warming weakened cornices and it is best to avoid them today. Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-21
March 21, 2016 at 7:07

The combination of weekend warming, a light refreeze of the surface snow and rain will provide us with another day of wet loose avalanche problems. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible in the moist surface snow on all aspects. Recent warming weakened cornices and it is best to avoid them today. Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope.

Whitefish Range
Click here to see the full advisory for 2016-03-21
March 21, 2016 at 7:07

The combination of weekend warming, a light refreeze of the surface snow and rain will provide us with another day of wet loose avalanche problems. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible in the moist surface snow on all aspects. Recent warming weakened cornices and it is best to avoid them today. Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope.

Swan Range
Click here to see the full advisory for 2016-03-20
March 20, 2016 at 7:00

Warming and sunshine led to both natural and human triggered avalanches over the past 48 hours. The avalanche danger is CONSIDERABLE above 5500 feet. Human triggered avalanches will become likely as the sun weakens the snow surface and large cornices. Natural avalanches will also be possible so limit exposure to run-out zones, particularly in the heat of the day. Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope.

Whitefish Range
Click here to see the full advisory for 2016-03-20
March 20, 2016 at 7:00

Warming and sunshine led to both natural and human triggered avalanches over the past 48 hours. The avalanche danger is CONSIDERABLE above 5500 feet. Human triggered avalanches will become likely as the sun weakens the snow surface and large cornices. Natural avalanches will also be possible so limit exposure to run-out zones, particularly in the heat of the day. Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope.

Swan Range
Click here to see the full advisory for 2016-03-20
March 20, 2016 at 7:00

Warming and sunshine led to both natural and human triggered avalanches over the past 48 hours. The avalanche danger is CONSIDERABLE above 5500 feet. Human triggered avalanches will become likely as the sun weakens the snow surface and large cornices. Natural avalanches will also be possible so limit exposure to run-out zones, particularly in the heat of the day. Weak snow near a series of crusts exists in the upper snowpack that should be assessed before committing to a slope.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-19
March 19, 2016 at 7:00

The avalanche danger is MODERATE, but will rise on sunny slopes today. The quick transition from winter to spring-like conditions will bring a host of avalanche problems. Pay attention to the affect of sun and warming temperatures on the recent snow as both human triggered and natural loose, wet avalanches are possible. Large cornices could also weaken and fail. Lingering wind slabs in the alpine and weak snow above a crust 2-3 feet from from the surface still exist.

Whitefish Range
Click here to see the full advisory for 2016-03-19
March 19, 2016 at 7:00

The avalanche danger is MODERATE, but will rise on sunny slopes today. The quick transition from winter to spring-like conditions will bring a host of avalanche problems. Pay attention to the affect of sun and warming temperatures on the recent snow as both human triggered and natural loose, wet avalanches are possible. Large cornices could also weaken and fail. Lingering wind slabs in the alpine and weak snow above a crust 2-3 feet from from the surface still exist.

Swan Range
Click here to see the full advisory for 2016-03-19
March 19, 2016 at 7:00

The avalanche danger is MODERATE, but will rise on sunny slopes today. The quick transition from winter to spring-like conditions will bring a host of avalanche problems. Pay attention to the affect of sun and warming temperatures on the recent snow as both human triggered and natural loose, wet avalanches are possible. Large cornices could also weaken and fail. Lingering wind slabs in the alpine and weak snow above a crust 2-3 feet from from the surface still exist.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-18
March 18, 2016 at 6:45

Sunny, warm spring days bring a mix of avalanche problems. Pay attention to how quickly warming affects the new snow from the past week. Both human triggered and natural wet, loose avalanches are possible. Large cornices could also weaken and fail. Lingering wind slabs in the alpine and weak snow above a crust 2-3 feet from from the surface still exist. The danger is MODERATE, but will rise on sunny slopes as the day progresses.

 

Whitefish Range
Click here to see the full advisory for 2016-03-18
March 18, 2016 at 6:45

Sunny, warm spring days bring a mix of avalanche problems. Pay attention to how quickly warming affects the new snow from the past week. Both human triggered and natural wet, loose avalanches are possible. Large cornices could also weaken and fail. Lingering wind slabs in the alpine and weak snow above a crust 2-3 feet from from the surface still exist. The danger is MODERATE, but will rise on sunny slopes as the day progresses.

 

Swan Range
Click here to see the full advisory for 2016-03-18
March 18, 2016 at 6:45

Sunny, warm spring days bring a mix of avalanche problems. Pay attention to how quickly warming affects the new snow from the past week. Both human triggered and natural wet, loose avalanches are possible. Large cornices could also weaken and fail. Lingering wind slabs in the alpine and weak snow above a crust 2-3 feet from from the surface still exist. The danger is MODERATE, but will rise on sunny slopes as the day progresses.

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-17
March 17, 2016 at 8:28

UPDATE: The Swan Range picked up close to a foot of snow in the past 24 hours with 7 inches the past 3 hours. This new snow and wind formed wind slabs in upper elevation terrain, and continues to stress deeper weak layers on top of a crust 2 to 3 feet from the surface. Careful snowpack and terrain evaluation are essential. Human triggered avalanches are likely today. The danger is CONSIDERABLE above 5000 feet and MODERATE below.

 

Swan Range
Click here to see the full advisory for 2016-03-17
March 17, 2016 at 7:00

More snow overnight created heightened avalanche conditions. Up to 1.5 feet of snow fell since Sunday night. This new snow and wind formed wind slabs in upper elevation terrain, and continues to stress deeper weak layers on top of a crust 2 to 3 feet from the surface. Careful snowpack and terrain evaluation are important. Human triggered avalanches are possible today. The danger is MODERATE* but could rise if snowfall persists longer than expected today. Swan Range advisory here.

 

Whitefish Range
Click here to see the full advisory for 2016-03-17
March 17, 2016 at 7:00

More snow overnight created heightened avalanche conditions. Up to 1.5 feet of snow fell since Sunday night. This new snow and wind formed wind slabs in upper elevation terrain, and continues to stress deeper weak layers on top of a crust 2 to 3 feet from the surface. Careful snowpack and terrain evaluation are important. Human triggered avalanches are possible today. The danger is MODERATE* but could rise if snowfall persists longer than expected today. Swan Range advisory here.

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2016-03-16
March 16, 2016 at 7:09

Fresh wind slabs continue to form throughout the upper elevations of our area. These slabs will be sensitive to the weight of a skier or rider and you are likely to trigger a wind slab avalanche in steep open terrain today. Continue to assess windloaded areas before committing to a slope. The avalanche danger is CONSIDERABLE on steep wind loaded terrain above 6000 feet. Between 5000 and 6000 feet the danger is MODERATE.

Whitefish Range
Click here to see the full advisory for 2016-03-16
March 16, 2016 at 7:09

Fresh wind slabs continue to form throughout the upper elevations of our area. These slabs will be sensitive to the weight of a skier or rider and you are likely to trigger a wind slab avalanche in steep open terrain today. Continue to assess windloaded areas before committing to a slope. The avalanche danger is CONSIDERABLE on steep wind loaded terrain above 6000 feet. Between 5000 and 6000 feet the danger is MODERATE.

Swan Range

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