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., Sunday, November 19, 2017
E.g., Sunday, November 19, 2017
E.g., Sunday, November 19, 2017
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2014-12-19
December 19, 2014 at 7:00

Unscheduled Avalanche Update - New snow and wind through today will cause the avalanche hazard to rise to Considerable above 5000 feet by the end of the day. Weak snow exists near the top of our snowpack. Human triggered avalanches are likely particularly on wind loaded slopes due to increasing wind and new snow load on top of these weak layers. Conservative decision making and cautious route-finding are essential now particularly after a prolonged period of lower avalanche hazard. 

Whitefish Range
Click here to see the full advisory for 2014-12-19
December 19, 2014 at 7:00

Unscheduled Avalanche Update - New snow and wind through today will cause the avalanche hazard to rise to Considerable above 5000 feet by the end of the day. Weak snow exists near the top of our snowpack. Human triggered avalanches are likely particularly on wind loaded slopes due to increasing wind and new snow load on top of these weak layers. Conservative decision making and cautious route-finding are essential now particularly after a prolonged period of lower avalanche hazard. 

Swan Range
Click here to see the full advisory for 2014-12-19
December 19, 2014 at 7:00

Unscheduled Avalanche Update - New snow and wind through today will cause the avalanche hazard to rise to Considerable above 5000 feet by the end of the day. Weak snow exists near the top of our snowpack. Human triggered avalanches are likely particularly on wind loaded slopes due to increasing wind and new snow load on top of these weak layers. Conservative decision making and cautious route-finding are essential now particularly after a prolonged period of lower avalanche hazard. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-18
December 18, 2014 at 6:48

The avalanche hazard above 6000 feet is Moderate, but could rise to Considerable by later today with new snow and wind on the way. The hazard below 6000 feet is Low, but could rise to ModerateSurface hoar and facets exist at and near the top of our snowpack. A substantial new snow load on top of these weak layers will cause the avalanche hazard to rise. 

Whitefish Range
Click here to see the full advisory for 2014-12-18
December 18, 2014 at 6:48

The avalanche hazard above 6000 feet is Moderate, but could rise to Considerable by later today with new snow and wind on the way. The hazard below 6000 feet is Low, but could rise to ModerateSurface hoar and facets exist at and near the top of our snowpack. A substantial new snow load on top of these weak layers will cause the avalanche hazard to rise. 

Swan Range
Click here to see the full advisory for 2014-12-18
December 18, 2014 at 6:48

The avalanche hazard above 6000 feet is Moderate, but could rise to Considerable by later today with new snow and wind on the way. The hazard below 6000 feet is Low, but could rise to ModerateSurface hoar and facets exist at and near the top of our snowpack. A substantial new snow load on top of these weak layers will cause the avalanche hazard to rise. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-16
December 16, 2014 at 6:49

The snowpack continues to show signs of strengthening. However, some signs of instability still exist on slopes with a shallow snowpack. Above 6000 feet the avalanche hazard is MODERATE on slopes steeper than 35 degrees. The hazard is LOW in all other locations. It is still important to evaluate all slopes before riding or skiing, particularly areas with a shallow snowpack. 

 

Whitefish Range
Click here to see the full advisory for 2014-12-16
December 16, 2014 at 6:49

The snowpack continues to show signs of strengthening. However, some signs of instability still exist on slopes with a shallow snowpack. Above 6000 feet the avalanche hazard is MODERATE on slopes steeper than 35 degrees. The hazard is LOW in all other locations. It is still important to evaluate all slopes before riding or skiing, particularly areas with a shallow snowpack. 

 

Swan Range
Click here to see the full advisory for 2014-12-16
December 16, 2014 at 6:49

The snowpack continues to show signs of strengthening. However, some signs of instability still exist on slopes with a shallow snowpack. Above 6000 feet the avalanche hazard is MODERATE on slopes steeper than 35 degrees. The hazard is LOW in all other locations. It is still important to evaluate all slopes before riding or skiing, particularly areas with a shallow snowpack. 

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-14
December 14, 2014 at 6:59

The Swan Range picked up the lion's share of the storm totals yesterday, other locations received between 3 and 6 inches of new snow. Winds associated with the frontal passage created sensitive wind slabs at higher elevations. Thus, wind loaded slopes above 6000 feet are rated considerable. For today, it is best to avoid wind loaded terrain, even if wind slabs appear relatively thin.

Whitefish Range
Click here to see the full advisory for 2014-12-14
December 14, 2014 at 6:59

The Swan Range picked up the lion's share of the storm totals yesterday, other locations received between 3 and 6 inches of new snow. Winds associated with the frontal passage created sensitive wind slabs at higher elevations. Thus, wind loaded slopes above 6000 feet are rated considerable. For today, it is best to avoid wind loaded terrain, even if wind slabs appear relatively thin.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-14
December 14, 2014 at 6:13

The Swan Range received a substantial amount of precipitation in the past 24 hours. As of 10:00pm last night Noisy Basin SNOTEL reported 8 inches of new snow with a snow water equivalent of 1.3 inches in the previous 24 hour period.In addition to stress added to previously formed weak layers, the storm snow needs time to settle and bond to the old snow surface. For today, avoid terrain steeper than 35º in areas that received this rapid load.

Swan Range
Click here to see the full advisory for 2014-12-13
December 13, 2014 at 7:02

Recent warming has contributed to the strengthening of some mid-snowpack instability, however it remains possible to trigger avalanches in weak snow (facets) near the ground in some locations. Continue to seek out these instabilities in the areas you are skiing or riding. Pay close attention to changing conditions in regard to new snow and associated winds in the forescast.

Whitefish Range
Click here to see the full advisory for 2014-12-13
December 13, 2014 at 7:02

Recent warming has contributed to the strengthening of some mid-snowpack instability, however it remains possible to trigger avalanches in weak snow (facets) near the ground in some locations. Continue to seek out these instabilities in the areas you are skiing or riding. Pay close attention to changing conditions in regard to new snow and associated winds in the forescast.

Swan Range
Click here to see the full advisory for 2014-12-13
December 13, 2014 at 7:02

Recent warming has contributed to the strengthening of some mid-snowpack instability, however it remains possible to trigger avalanches in weak snow (facets) near the ground in some locations. Continue to seek out these instabilities in the areas you are skiing or riding. Pay close attention to changing conditions in regard to new snow and associated winds in the forescast.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-11
December 11, 2014 at 6:35

Human triggered avalanches are possible due to lingering instability of weak snow (facets) near the ground. Wet avalanches are also possible due to rain and above freezing temperatures. Carefully evaluate each slope before you commit to it and avoid steep, rocky slopes with shallow snow where it is easier to trigger this weak snow near the ground. Pay attention to changing conditions throughout the day particularly during rain events. If it rains more than expected, the hazard will rise. 

Whitefish Range
Click here to see the full advisory for 2014-12-11
December 11, 2014 at 6:35

Human triggered avalanches are possible due to lingering instability of weak snow (facets) near the ground. Wet avalanches are also possible due to rain and above freezing temperatures. Carefully evaluate each slope before you commit to it and avoid steep, rocky slopes with shallow snow where it is easier to trigger this weak snow near the ground. Pay attention to changing conditions throughout the day particularly during rain events. If it rains more than expected, the hazard will rise. 

Swan Range
Click here to see the full advisory for 2014-12-11
December 11, 2014 at 6:35

Human triggered avalanches are possible due to lingering instability of weak snow (facets) near the ground. Wet avalanches are also possible due to rain and above freezing temperatures. Carefully evaluate each slope before you commit to it and avoid steep, rocky slopes with shallow snow where it is easier to trigger this weak snow near the ground. Pay attention to changing conditions throughout the day particularly during rain events. If it rains more than expected, the hazard will rise. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-09
December 9, 2014 at 6:46

Human triggered avalanches are possible today due to lingering wind slabs near the tops of ridges and weak snow (facets) at the ground and mid-pack above 5000 feet. Rising temperatures and potential rain on snow could cause wet avalanche problems later today. The hazard below 5000 feet will begin Low and rise to Moderate. Pay attention to changing conditions and evaluate snow and terrain carefully. Expect the hazard to rise into tomorrow as rain falls on snow. 

Whitefish Range
Click here to see the full advisory for 2014-12-09
December 9, 2014 at 6:46

Human triggered avalanches are possible today due to lingering wind slabs near the tops of ridges and weak snow (facets) at the ground and mid-pack above 5000 feet. Rising temperatures and potential rain on snow could cause wet avalanche problems later today. The hazard below 5000 feet will begin Low and rise to Moderate. Pay attention to changing conditions and evaluate snow and terrain carefully. Expect the hazard to rise into tomorrow as rain falls on snow. 

Swan Range
Click here to see the full advisory for 2014-12-09
December 9, 2014 at 6:46

Human triggered avalanches are possible today due to lingering wind slabs near the tops of ridges and weak snow (facets) at the ground and mid-pack above 5000 feet. Rising temperatures and potential rain on snow could cause wet avalanche problems later today. The hazard below 5000 feet will begin Low and rise to Moderate. Pay attention to changing conditions and evaluate snow and terrain carefully. Expect the hazard to rise into tomorrow as rain falls on snow. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-07
December 7, 2014 at 6:59

Wind transported snow at high elevations formed fresh wind slabs for today. The avalanche hazard is rated considerable on wind loaded slopes above 6000 feet. The potential also remains to trigger a deeper persistent slab avalanche in weak snow (facets) near the ground as well as weak snow adjacent to the Thanksgiving crust. Avoid wind loaded slopes in the high elevations and continue to choose terrain conservatively.

Whitefish Range
Click here to see the full advisory for 2014-12-07
December 7, 2014 at 6:59

Wind transported snow at high elevations formed fresh wind slabs for today. The avalanche hazard is rated considerable on wind loaded slopes above 6000 feet. The potential also remains to trigger a deeper persistent slab avalanche in weak snow (facets) near the ground as well as weak snow adjacent to the Thanksgiving crust. Avoid wind loaded slopes in the high elevations and continue to choose terrain conservatively.

Swan Range
Click here to see the full advisory for 2014-12-07
December 7, 2014 at 6:59

Wind transported snow at high elevations formed fresh wind slabs for today. The avalanche hazard is rated considerable on wind loaded slopes above 6000 feet. The potential also remains to trigger a deeper persistent slab avalanche in weak snow (facets) near the ground as well as weak snow adjacent to the Thanksgiving crust. Avoid wind loaded slopes in the high elevations and continue to choose terrain conservatively.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-06
December 6, 2014 at 7:02

The recent storm snow and wind formed wind slabs at upper elevations. Wind slab avalanches are likely above 6000 feet, with the possibility of avalanches breaking in deeper layers. Cautious route finding and conservative decision making are essential.

Whitefish Range
Click here to see the full advisory for 2014-12-06
December 6, 2014 at 7:02

The recent storm snow and wind formed wind slabs at upper elevations. Wind slab avalanches are likely above 6000 feet, with the possibility of avalanches breaking in deeper layers. Cautious route finding and conservative decision making are essential.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2014-12-06
December 6, 2014 at 6:53

Storm snow from Thursday and Friday was very reactive yesterday and the snowpack still needs time to adjust to this new load. Storm slab avalanches are likely above 5000 feet, with the possibility of avalanches breaking in deeper layers. Cautious route finding and conservative decision making are essential.

Swan Range
Click here to see the full advisory for 2014-12-05
December 5, 2014 at 7:30

Dangerous avalanche conditions exist. Substantial new snow and rising temperatures over the past 24 hours will cause the avalanche hazard to rise through today. New storm slabs as well as wind slabs will be problems today. The snowpack still consists of weak snow (facets) near the ground in most locations as well as weak snow (facets) above the Thanksgiving crust.  Cautious routefinding and conservative decision making are essential. We will begin issuing regular advisories tomorrow, Dec. 6.

Whitefish Range
Click here to see the full advisory for 2014-12-05
December 5, 2014 at 7:30

Dangerous avalanche conditions exist. Substantial new snow and rising temperatures over the past 24 hours will cause the avalanche hazard to rise through today. New storm slabs as well as wind slabs will be problems today. The snowpack still consists of weak snow (facets) near the ground in most locations as well as weak snow (facets) above the Thanksgiving crust.  Cautious routefinding and conservative decision making are essential. We will begin issuing regular advisories tomorrow, Dec. 6.

Swan Range
Click here to see the full advisory for 2014-12-05
December 5, 2014 at 7:30

Dangerous avalanche conditions exist. Substantial new snow and rising temperatures over the past 24 hours will cause the avalanche hazard to rise through today. New storm slabs as well as wind slabs will be problems today. The snowpack still consists of weak snow (facets) near the ground in most locations as well as weak snow (facets) above the Thanksgiving crust.  Cautious routefinding and conservative decision making are essential. We will begin issuing regular advisories tomorrow, Dec. 6.

Flathead Range and Glacier National Park

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