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., Wednesday, January 17, 2018
E.g., Wednesday, January 17, 2018
E.g., Wednesday, January 17, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2017-03-31
March 31, 2017 at 7:02

Today's danger will start out at LOW. As temperatures rise and the clouds break up, the avalanche danger will rise to CONSIDERABLE on sunny slopes above 6000 feet. The upper elevation snowfall from earlier this week has yet to be tested by the spring's powerful daytime warming and sunshine. As the sun heats the snow surface, move to shadier slopes.  The danger will rise to MODERATE in the mid-elevations, where it will remain possible to trigger loose, wet avalanches.

Swan Range
Click here to see the full advisory for 2017-03-30
March 30, 2017 at 5:35

In the past two days about a foot of snow fell above 6500 feet favoring the Swan and Whitefish Ranges. Temperatures warmed and formed a thin, upside down storm layer. Additionally, 20-40 mph winds during the storm added depth to recent wind slabs. The avalanche danger is CONSIDERABLE above 6000 feet. Carefully, evaluate the snowpack and make conservative terrain choices. The danger is MODERATE in the mid elevations where it will remain possible to trigger loose, wet avalanches.

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-30
March 30, 2017 at 5:35

In the past two days about a foot of snow fell above 6500 feet favoring the Swan and Whitefish Ranges. Temperatures warmed and formed a thin, upside down storm layer. Additionally, 20-40 mph winds during the storm added depth to recent wind slabs. The avalanche danger is CONSIDERABLE above 6000 feet. Carefully, evaluate the snowpack and make conservative terrain choices. The danger is MODERATE in the mid elevations where it will remain possible to trigger loose, wet avalanches.

 

Whitefish Range
Click here to see the full advisory for 2017-03-30
March 30, 2017 at 5:35

In the past two days about a foot of snow fell above 6500 feet favoring the Swan and Whitefish Ranges. Temperatures warmed and formed a thin, upside down storm layer. Additionally, 20-40 mph winds during the storm added depth to recent wind slabs. The avalanche danger is CONSIDERABLE above 6000 feet. Carefully, evaluate the snowpack and make conservative terrain choices. The danger is MODERATE in the mid elevations where it will remain possible to trigger loose, wet avalanches.

 

Swan Range
Click here to see the full advisory for 2017-03-29
March 29, 2017 at 7:00

Recently formed wind slabs will be slow to strengthen due to the smooth crust (sliding surface) they were formed on. A few inches of snow and continued wind today will thicken these slabs. The avalanche danger is MODERATE above 6000 feet. Carefully evaluate wind loaded terrain before committing to a slope. Below 6000 feet the danger is LOW, but will rise if we get rain to assist in breaking down the surface crust.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-29
March 29, 2017 at 7:00

Recently formed wind slabs will be slow to strengthen due to the smooth crust (sliding surface) they were formed on. A few inches of snow and continued wind today will thicken these slabs. The avalanche danger is MODERATE above 6000 feet. Carefully evaluate wind loaded terrain before committing to a slope. Below 6000 feet the danger is LOW, but will rise if we get rain to assist in breaking down the surface crust.

Whitefish Range
Click here to see the full advisory for 2017-03-29
March 29, 2017 at 7:00

Recently formed wind slabs will be slow to strengthen due to the smooth crust (sliding surface) they were formed on. A few inches of snow and continued wind today will thicken these slabs. The avalanche danger is MODERATE above 6000 feet. Carefully evaluate wind loaded terrain before committing to a slope. Below 6000 feet the danger is LOW, but will rise if we get rain to assist in breaking down the surface crust.

Swan Range
Click here to see the full advisory for 2017-03-28
March 28, 2017 at 7:00

Wind slabs on top of a surface crust are still growing from snow and moderate winds yesterday. These slabs will continue to form through the day. The avalanche danger is MODERATE above 6000' on wind loaded terrain and LOW below 6000' where we can find a loose wet avalanche problem.  Be wary if the sun makes an appearance today as it can rapidly warm the surface snow increasing the instability.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-28
March 28, 2017 at 7:00

Wind slabs on top of a surface crust are still growing from snow and moderate winds yesterday. These slabs will continue to form through the day. The avalanche danger is MODERATE above 6000' on wind loaded terrain and LOW below 6000' where we can find a loose wet avalanche problem.  Be wary if the sun makes an appearance today as it can rapidly warm the surface snow increasing the instability.

Whitefish Range
Click here to see the full advisory for 2017-03-28
March 28, 2017 at 7:00

Wind slabs on top of a surface crust are still growing from snow and moderate winds yesterday. These slabs will continue to form through the day. The avalanche danger is MODERATE above 6000' on wind loaded terrain and LOW below 6000' where we can find a loose wet avalanche problem.  Be wary if the sun makes an appearance today as it can rapidly warm the surface snow increasing the instability.

Swan Range
Click here to see the full advisory for 2017-03-27
March 27, 2017 at 6:58

Overnight snow, combined with wind, has formed fresh wind slabs on top of a surface crust. These slabs will continue to form through the day with expected light precipitation and continued wind. Lingering instabilities remain with the wind slabs formed earlier in the weekend. The avalanche danger is MODERATE above 6000' on wind loaded terrain and LOW below 6000' where rain and a moist snow surface have resulted in a loose wet avalanche problem.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-27
March 27, 2017 at 6:58

Overnight snow, combined with wind, has formed fresh wind slabs on top of a surface crust. These slabs will continue to form through the day with expected light precipitation and continued wind. Lingering instabilities remain with the wind slabs formed earlier in the weekend. The avalanche danger is MODERATE above 6000' on wind loaded terrain and LOW below 6000' where rain and a moist snow surface have resulted in a loose wet avalanche problem.

Whitefish Range
Click here to see the full advisory for 2017-03-27
March 27, 2017 at 6:58

Overnight snow, combined with wind, has formed fresh wind slabs on top of a surface crust. These slabs will continue to form through the day with expected light precipitation and continued wind. Lingering instabilities remain with the wind slabs formed earlier in the weekend. The avalanche danger is MODERATE above 6000' on wind loaded terrain and LOW below 6000' where rain and a moist snow surface have resulted in a loose wet avalanche problem.

Swan Range
Click here to see the full advisory for 2017-03-26
March 26, 2017 at 6:33

Moderate to strong winds over the past 36 hours formed fresh wind slabs at upper elevations. In locations these slabs were deposited onto a crust and all wind loaded terrain should be evaluated before committing to a slope. Periods of sun today will weaken the snow surface on sunny aspects creating a loose wet avalanche problem. The avalanche danger is MODERATE above 6000' on wind loaded terrain and the danger will rise to MODERATE on sunny aspects above 5000'.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-26
March 26, 2017 at 6:33

Moderate to strong winds over the past 36 hours formed fresh wind slabs at upper elevations. In locations these slabs were deposited onto a crust and all wind loaded terrain should be evaluated before committing to a slope. Periods of sun today will weaken the snow surface on sunny aspects creating a loose wet avalanche problem. The avalanche danger is MODERATE above 6000' on wind loaded terrain and the danger will rise to MODERATE on sunny aspects above 5000'.

Whitefish Range
Click here to see the full advisory for 2017-03-26
March 26, 2017 at 6:33

Moderate to strong winds over the past 36 hours formed fresh wind slabs at upper elevations. In locations these slabs were deposited onto a crust and all wind loaded terrain should be evaluated before committing to a slope. Periods of sun today will weaken the snow surface on sunny aspects creating a loose wet avalanche problem. The avalanche danger is MODERATE above 6000' on wind loaded terrain and the danger will rise to MODERATE on sunny aspects above 5000'.

Swan Range
Click here to see the full advisory for 2017-03-25
March 25, 2017 at 6:43

Light snow, accompanied by wind, has created thin wind slabs in exposed upper elevation locations. These slabs were potentially deposited onto a crust and all wind loaded terrain should be evaluated before committing to a slope. At mid and low elevations light rain and above freezing temperatures have kept the surface snow moist and therefore a loose wet avalanche problem remains. The avalanche danger is LOW and safe travel techniques should be practiced.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-25
March 25, 2017 at 6:43

Light snow, accompanied by wind, has created thin wind slabs in exposed upper elevation locations. These slabs were potentially deposited onto a crust and all wind loaded terrain should be evaluated before committing to a slope. At mid and low elevations light rain and above freezing temperatures have kept the surface snow moist and therefore a loose wet avalanche problem remains. The avalanche danger is LOW and safe travel techniques should be practiced.

Whitefish Range
Click here to see the full advisory for 2017-03-25
March 25, 2017 at 6:43

Light snow, accompanied by wind, has created thin wind slabs in exposed upper elevation locations. These slabs were potentially deposited onto a crust and all wind loaded terrain should be evaluated before committing to a slope. At mid and low elevations light rain and above freezing temperatures have kept the surface snow moist and therefore a loose wet avalanche problem remains. The avalanche danger is LOW and safe travel techniques should be practiced.

Swan Range
Click here to see the full advisory for 2017-03-24
March 24, 2017 at 7:00

The cold temperatures and clear skies overnight formed a firm snow surface. The morning sun will have a tough time breaking down this crust before the clouds roll in. The avalanche danger is LOW this morning, but warming temperatures and light rain in the afternoon will elevate the danger to MODERATE at low and mid elevations. Pay attention to signs of a weakening snow surface like roller balls forming on steep slopes, and of course, rain on the snow.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-24
March 24, 2017 at 7:00

The cold temperatures and clear skies overnight formed a firm snow surface. The morning sun will have a tough time breaking down this crust before the clouds roll in. The avalanche danger is LOW this morning, but warming temperatures and light rain in the afternoon will elevate the danger to MODERATE at low and mid elevations. Pay attention to signs of a weakening snow surface like roller balls forming on steep slopes, and of course, rain on the snow.

Whitefish Range
Click here to see the full advisory for 2017-03-24
March 24, 2017 at 7:00

The cold temperatures and clear skies overnight formed a firm snow surface. The morning sun will have a tough time breaking down this crust before the clouds roll in. The avalanche danger is LOW this morning, but warming temperatures and light rain in the afternoon will elevate the danger to MODERATE at low and mid elevations. Pay attention to signs of a weakening snow surface like roller balls forming on steep slopes, and of course, rain on the snow.

Swan Range
Click here to see the full advisory for 2017-03-23
March 23, 2017 at 7:00

Cool temperatures overnight re-froze and strengthened the moist surface snow. The avalanche danger is LOW this morning, but will rise to MODERATE on sun exposed slopes above 5000 feet today. Move to a shaded area when you see the early signs of weakening surface snow like rollerballs or pinwheels forming on steep slopes. Remember that LOW danger does not mean no danger. Continue to make site specific snow pack and terrain evaluations as isolated areas of unstable snow exist.    

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-23
March 23, 2017 at 7:00

Cool temperatures overnight re-froze and strengthened the moist surface snow. The avalanche danger is LOW this morning, but will rise to MODERATE on sun exposed slopes above 5000 feet today. Move to a shaded area when you see the early signs of weakening surface snow like rollerballs or pinwheels forming on steep slopes. Remember that LOW danger does not mean no danger. Continue to make site specific snow pack and terrain evaluations as isolated areas of unstable snow exist.    

Whitefish Range
Click here to see the full advisory for 2017-03-23
March 23, 2017 at 7:00

Cool temperatures overnight re-froze and strengthened the moist surface snow. The avalanche danger is LOW this morning, but will rise to MODERATE on sun exposed slopes above 5000 feet today. Move to a shaded area when you see the early signs of weakening surface snow like rollerballs or pinwheels forming on steep slopes. Remember that LOW danger does not mean no danger. Continue to make site specific snow pack and terrain evaluations as isolated areas of unstable snow exist.    

Swan Range
Click here to see the full advisory for 2017-03-22
March 22, 2017 at 7:00

The avalanche danger is Moderate at all elevations today.  Rainfall and the lack of a strong refreeze last night lead to weakening surface snow and create the potential for triggering a loose, wet avalanche.  Be aware of surface snow strength continuing to deteriorate as temperatures warm.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2017-03-22
March 22, 2017 at 7:00

The avalanche danger is Moderate at all elevations today.  Rainfall and the lack of a strong refreeze last night lead to weakening surface snow and create the potential for triggering a loose, wet avalanche.  Be aware of surface snow strength continuing to deteriorate as temperatures warm.  

Whitefish Range
Click here to see the full advisory for 2017-03-22
March 22, 2017 at 7:00

The avalanche danger is Moderate at all elevations today.  Rainfall and the lack of a strong refreeze last night lead to weakening surface snow and create the potential for triggering a loose, wet avalanche.  Be aware of surface snow strength continuing to deteriorate as temperatures warm.  

Swan Range
Click here to see the full advisory for 2017-03-21
March 21, 2017 at 6:57

The avalanche danger is LOW at all elevations today, but will increase this evening.  Despite cloud cover today, rising temperatures and a bit of rain this evening will create the potential for triggering a loose, wet avalanche.  Be aware of changing conditions today.  Expect the avalanche danger to rise rapidly this evening into tonight as rain moves into the area. LOW danger does not mean no danger. Practice appropriate avalanche travel techniques.

Whitefish Range
Click here to see the full advisory for 2017-03-21
March 21, 2017 at 6:57

The avalanche danger is LOW at all elevations today, but will increase this evening.  Despite cloud cover today, rising temperatures and a bit of rain this evening will create the potential for triggering a loose, wet avalanche.  Be aware of changing conditions today.  Expect the avalanche danger to rise rapidly this evening into tonight as rain moves into the area. LOW danger does not mean no danger. Practice appropriate avalanche travel techniques.

Swan Range

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