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, June 24, 2018
E.g., Sunday, June 24, 2018
E.g., Sunday, June 24, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2018-04-15
April 15, 2018 at 19:50

Springtime generally offers a more predictable snowpack in the mountains, but avalanche activity continues into summer in Northwest Montana. Avalanche conditions are dynamic - snow stability deteriorates quickly with subtle changes in snow, rain, wind, sun, and temperatures. Continue to assess the weather, snowpack, and terrain, and practice safe travel techniques until the snow melts. 

Whitefish Range
Click here to see the full advisory for 2018-04-15
April 15, 2018 at 19:50

Springtime generally offers a more predictable snowpack in the mountains, but avalanche activity continues into summer in Northwest Montana. Avalanche conditions are dynamic - snow stability deteriorates quickly with subtle changes in snow, rain, wind, sun, and temperatures. Continue to assess the weather, snowpack, and terrain, and practice safe travel techniques until the snow melts. 

Swan Range
Click here to see the full advisory for 2018-04-15
April 15, 2018 at 19:50

Springtime generally offers a more predictable snowpack in the mountains, but avalanche activity continues into summer in Northwest Montana. Avalanche conditions are dynamic - snow stability deteriorates quickly with subtle changes in snow, rain, wind, sun, and temperatures. Continue to assess the weather, snowpack, and terrain, and practice safe travel techniques until the snow melts. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-14
April 14, 2018 at 7:04

Several storm slabs were easily triggered in the new snow on Friday. Up to 20” of new snow is consolidating into reactive slabs over a variety of crusts and will slowly bond with old snow through the weekend. Cracks in the snow surface are a sign of instability to avoid steep terrain. Periods of sunshine on Saturday and warmer temperatures on Sunday will increase the threat of loose wet avalanches. Monitor surface warming.

Whitefish Range
Click here to see the full advisory for 2018-04-14
April 14, 2018 at 7:04

Several storm slabs were easily triggered in the new snow on Friday. Up to 20” of new snow is consolidating into reactive slabs over a variety of crusts and will slowly bond with old snow through the weekend. Cracks in the snow surface are a sign of instability to avoid steep terrain. Periods of sunshine on Saturday and warmer temperatures on Sunday will increase the threat of loose wet avalanches. Monitor surface warming.

Swan Range
Click here to see the full advisory for 2018-04-14
April 14, 2018 at 7:04

Several storm slabs were easily triggered in the new snow on Friday. Up to 20” of new snow is consolidating into reactive slabs over a variety of crusts and will slowly bond with old snow through the weekend. Cracks in the snow surface are a sign of instability to avoid steep terrain. Periods of sunshine on Saturday and warmer temperatures on Sunday will increase the threat of loose wet avalanches. Monitor surface warming.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-12
April 12, 2018 at 7:06

New snow and wind on Thursday will begin to form storm slabs at mid and upper elevations. As snow continues, these slabs will thicken and become more widespread. New snow is adding stress to a buried crust/ facet combo that formed earlier in the month. Watch for surface cracking in new snow and lens-shaped pillows on high elevation, leeward slopes. Warmer temps and sunshine on Friday could increase the threat of loose wet avalanches on sunny aspects.

Whitefish Range
Click here to see the full advisory for 2018-04-12
April 12, 2018 at 7:06

New snow and wind on Thursday will begin to form storm slabs at mid and upper elevations. As snow continues, these slabs will thicken and become more widespread. New snow is adding stress to a buried crust/ facet combo that formed earlier in the month. Watch for surface cracking in new snow and lens-shaped pillows on high elevation, leeward slopes. Warmer temps and sunshine on Friday could increase the threat of loose wet avalanches on sunny aspects.

Swan Range
Click here to see the full advisory for 2018-04-12
April 12, 2018 at 7:06

New snow and wind on Thursday will begin to form storm slabs at mid and upper elevations. As snow continues, these slabs will thicken and become more widespread. New snow is adding stress to a buried crust/ facet combo that formed earlier in the month. Watch for surface cracking in new snow and lens-shaped pillows on high elevation, leeward slopes. Warmer temps and sunshine on Friday could increase the threat of loose wet avalanches on sunny aspects.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-10
April 10, 2018 at 7:02

Warming temperatures, sunshine, and rain showers will increase the threat of shallow loose wet avalanches on Tuesday.  Look for rollerballs to indicate decreasing stability.  Cooler temperatures on Wednesday should curb wet concerns.  An increase in southwest winds through Tuesday night could form small wind slabs on high elevation, leeward terrain.  Watch for blowing snow or thicker drifts.  

Whitefish Range
Click here to see the full advisory for 2018-04-10
April 10, 2018 at 7:02

Warming temperatures, sunshine, and rain showers will increase the threat of shallow loose wet avalanches on Tuesday.  Look for rollerballs to indicate decreasing stability.  Cooler temperatures on Wednesday should curb wet concerns.  An increase in southwest winds through Tuesday night could form small wind slabs on high elevation, leeward terrain.  Watch for blowing snow or thicker drifts.  

Swan Range
Click here to see the full advisory for 2018-04-10
April 10, 2018 at 7:02

Warming temperatures, sunshine, and rain showers will increase the threat of shallow loose wet avalanches on Tuesday.  Look for rollerballs to indicate decreasing stability.  Cooler temperatures on Wednesday should curb wet concerns.  An increase in southwest winds through Tuesday night could form small wind slabs on high elevation, leeward terrain.  Watch for blowing snow or thicker drifts.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-08
April 8, 2018 at 7:02

The avalanche danger remains elevated due to continued rain, dense snow, and winds. Sensitive slabs are thickening at higher elevations, while rain and wet snow are causing wet avalanche concerns lower in the terrain. Evaluate new snow totals and bonding with the underlying crust.

Whitefish Range
Click here to see the full advisory for 2018-04-08
April 8, 2018 at 7:02

The avalanche danger remains elevated due to continued rain, dense snow, and winds. Sensitive slabs are thickening at higher elevations, while rain and wet snow are causing wet avalanche concerns lower in the terrain. Evaluate new snow totals and bonding with the underlying crust.

Swan Range
Click here to see the full advisory for 2018-04-08
April 8, 2018 at 7:02

The avalanche danger remains elevated due to continued rain, dense snow, and winds. Sensitive slabs are thickening at higher elevations, while rain and wet snow are causing wet avalanche concerns lower in the terrain. Evaluate new snow totals and bonding with the underlying crust.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-07
April 7, 2018 at 7:03

This morning the avalanche danger is MODERATE. A warm wet storm will impact our area later today raising the danger to CONSIDERABLE. Wet avalanches will become a concern below the rain line and dense snow will form sensitive slabs above it. Monitor changing conditions and be alert for natural activity later today. 

Whitefish Range
Click here to see the full advisory for 2018-04-07
April 7, 2018 at 7:03

This morning the avalanche danger is MODERATE. A warm wet storm will impact our area later today raising the danger to CONSIDERABLE. Wet avalanches will become a concern below the rain line and dense snow will form sensitive slabs above it. Monitor changing conditions and be alert for natural activity later today. 

Swan Range
Click here to see the full advisory for 2018-04-07
April 7, 2018 at 7:03

This morning the avalanche danger is MODERATE. A warm wet storm will impact our area later today raising the danger to CONSIDERABLE. Wet avalanches will become a concern below the rain line and dense snow will form sensitive slabs above it. Monitor changing conditions and be alert for natural activity later today. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-06
April 6, 2018 at 7:53

New snow and wind may form thin slabs at upper elevations on atypical slopes. Approach lens-shaped pillows with caution and look for cracks as a sign of instability. Wind-sheltered, low angle slopes offer the safest riding conditions.

Whitefish Range
Click here to see the full advisory for 2018-04-06
April 6, 2018 at 7:53

New snow and wind may form thin slabs at upper elevations on atypical slopes. Approach lens-shaped pillows with caution and look for cracks as a sign of instability. Wind-sheltered, low angle slopes offer the safest riding conditions.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-06
April 6, 2018 at 7:50

Over a foot of new snow is creating dangerous avalanche conditions. Natural or human-triggered storm slabs are likely on slopes steeper than 35 degrees at mid and upper elevations. Cracking snow or recent avalanche activity are signs to stay on low angle slopes.

Swan Range
Click here to see the full advisory for 2018-04-05
April 5, 2018 at 7:17

Snowfall overnight formed fresh, shallow storm slabs overlapping with thicker slabs from earlier this week. Thin wind slabs may develop on atypical slopes from northeast winds. Evaluate snow totals, wind transport, and look for surface cracks as a sign of instability.

Whitefish Range
Click here to see the full advisory for 2018-04-05
April 5, 2018 at 7:17

Snowfall overnight formed fresh, shallow storm slabs overlapping with thicker slabs from earlier this week. Thin wind slabs may develop on atypical slopes from northeast winds. Evaluate snow totals, wind transport, and look for surface cracks as a sign of instability.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-05
April 5, 2018 at 7:16

Snowfall overnight formed fresh, shallow storm slabs overlapping with thicker slabs from earlier this week. Thin wind slabs may develop on atypical slopes from northeast winds. Evaluate snow totals, wind transport, and look for surface cracks as a sign of instability.

Swan Range
Click here to see the full advisory for 2018-04-04
April 4, 2018 at 7:03

Almost 2 feet of snow this week is healing slowly due to continued snowfall and unseasonably cold temperatures.  Human triggered or natural soft slab avalanches breaking in the new snow have occurred every day this week.  Evaluate terrain and bonding of storm slabs carefully.  Shooting cracks indicate unstable snow.

Whitefish Range
Click here to see the full advisory for 2018-04-04
April 4, 2018 at 7:03

Almost 2 feet of snow this week is healing slowly due to continued snowfall and unseasonably cold temperatures.  Human triggered or natural soft slab avalanches breaking in the new snow have occurred every day this week.  Evaluate terrain and bonding of storm slabs carefully.  Shooting cracks indicate unstable snow.

Swan Range
Click here to see the full advisory for 2018-04-04
April 4, 2018 at 7:03

Almost 2 feet of snow this week is healing slowly due to continued snowfall and unseasonably cold temperatures.  Human triggered or natural soft slab avalanches breaking in the new snow have occurred every day this week.  Evaluate terrain and bonding of storm slabs carefully.  Shooting cracks indicate unstable snow.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-03
April 3, 2018 at 7:01

Yesterday, backcountry travelers easily triggered slab avalanches breaking in the new snow running on slick crusts.   Expect more of the same today, especially in wind drifted areas or steep rollovers.  Evaluate terrain consequences and bonding of the new snow carefully.  Shooting cracks are a clear sign of unstable snow.   

Swan Range
Click here to see the full advisory for 2018-04-03
April 3, 2018 at 7:01

Yesterday, backcountry travelers easily triggered slab avalanches breaking in the new snow running on slick crusts.   Expect more of the same today, especially in wind drifted areas or steep rollovers.  Evaluate terrain consequences and bonding of the new snow carefully.  Shooting cracks are a clear sign of unstable snow.   

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-03
April 3, 2018 at 7:01

Yesterday, backcountry travelers easily triggered slab avalanches breaking in the new snow running on slick crusts.   Expect more of the same today, especially in wind drifted areas or steep rollovers.  Evaluate terrain consequences and bonding of the new snow carefully.  Shooting cracks are a clear sign of unstable snow.   

Whitefish Range

Pages

CSV