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., Tuesday, April 24, 2018
E.g., Tuesday, April 24, 2018
E.g., Tuesday, April 24, 2018
Date the advisory was published:sort ascending
Click here to see the full advisory for 2018-04-06
April 6, 2018 at 6:57

A strong weather system is currently moving through northern Idaho.  Today, expect to see strong winds, snow and freezing temperatures. Yesterday's rain/snow mix saturated the top 6-8'' of the snowpack and made it avalanche prone. Temperatures overnight were cold enough to lock it back up though. I'd expect to see a firm refrozen surface today with places of wind deposited snow on top.  I wouldn't expect to see any natural activity today but human triggered avalanches are possible.

Advisory
Click here to see the full advisory for 2018-04-06
April 6, 2018 at 6:54

Continuing with our April snow showers theme through Friday, we recieved 2 to 7" of snow in the last 24 hours at the high elevations.  This came in warm yesterday and had good bonding to the crusts underneath, but expect wind slabs at the ridgelines from the cooler snow that came in overnight.  Cold overnight temperatures helped improve the stability due to wet slide potential, but watch for it to increase as daytime temperatures go above freezing again this weekend.

Advisory
Click here to see the full advisory for 2018-04-06
April 6, 2018 at 4:54

Thursdays warm weather conditions will be pushed out of the area on Friday morning by a cold arctic front. This decline in temperatures will improve the stability of the upper snowpack as it locks the wet snow together on Friday.  Moving into the weekend the weather forecast is predicting additional snowfall that is predicted to be wet and dense. These conditions will likely increase the avalanche hazard as dense storm slabs build through the weekend.

Advisory
Click here to see the full advisory for 2018-04-03
April 3, 2018 at 6:52

April SNOW showers! Wind slabs continue to be the main concern at the higher elevation ridges.  The new snow that we've been getting has been accompanied by transport speed winds. The small storms with winds trend will continue this week, creating layered wind slabs.  Look for signs of windloading in the areas you are travelling.  

Advisory
Click here to see the full advisory for 2018-04-03
April 3, 2018 at 6:52

Put away your tennis rackets and mountain bikes. Winter is still here! The Selkirk and Cabinet mountains got a refresh of snow over the past 48 hours. Between 6-13'' fell above 4500'.  Most areas are showing winds were out of the S-SW-W.  Snow densities were low so expect to see snow on the move. Any leeward slope should be looked at with heightened concern.  The snow surface under the new snow is frozen and firm, making a good slide surface.

Advisory
Click here to see the full advisory for 2018-04-03
April 3, 2018 at 6:52

Put away your tennis rackets and mountain bikes. Winter is still here! The Selkirk and Cabinet mountains got a refresh of snow over the past 48 hours. Between 6-13'' fell above 4500'.  Most areas are showing winds were out of the S-SW-W.  Snow densities were low so expect to see snow on the move. Any leeward slope should be looked at with heightened concern.  The snow surface under the new snow is frozen and firm, making a good slide surface.

Advisory
Click here to see the full advisory for 2018-03-30
March 30, 2018 at 6:49

The mountains have been experiencing mild weather this week which has helped the snowpack settle and stabilize nicely.  Watch near the ridgetops and ridgelines as they could be harboring isolated windslaps that could be triggered in steep terrain.  Pay attention to daytime temperatures and solar radiation and choose your slopes to follow those temperatures.   

Advisory
Click here to see the full advisory for 2018-03-30
March 30, 2018 at 6:39

The mountains have not picked up an appreciable amount of new snow since last week and the mild weather has settled the pack nicely.  Diurnal temperatures are creating a breakable crust at the surface on all aspects.  The north aspect has some layers in last weeks snow but not too concerning.  Watch windloaded areas, mainly N and E, in steep terrain where windslabs could fail.

Advisory
Click here to see the full advisory for 2018-03-30
March 30, 2018 at 6:08

The highest elevations of the Kootenai are harboring isolated wind slabs that could be triggered in steep terrain. Pay attention to density changes in the surface snowpack and look for "lens shaped pillows" when travelling above treeline. At lower elevations the snowpack is generally stable, the exception will be during Saturday when the sun may cause small, "loose-wet" avalanches on southerly and westerly aspects.

Advisory
Click here to see the full advisory for 2018-03-27
March 27, 2018 at 6:55

It continues to still be winter up in the mountains! We have another storm hitting with 4 - 8 inches through tomorrow.  Accompanying that storm is sustained winds in the upper 20 mph range and gusts in the 40's.  Expect to find windloading on the leeward ridgetops and cross loading in open areas.  In the lower elevations where there is rain predicted with the storm, expect to see loose wet slides as the snowpack absorbs the rain.  

Advisory
Click here to see the full advisory for 2018-03-27
March 27, 2018 at 6:30

Just as we get going with Spring, winter comes roaring back! A strong, fast moving system's currently moving through the panhandle. the storm looks like it will drop another 4-6'' of snow (above 4000') accompanied by strong SW winds. It looks like the storm will push out tomorrow morning. The cold temperatures leading up to this storm have kept the snowpack cold and frozen.  Be most aware of new snow slab formation. Hang in there, spring has to come sometime...right?!

Advisory
Click here to see the full advisory for 2018-03-27
March 27, 2018 at 5:36

Strong southwesterly winds and new snow will continue to build windslabs today. Expect to find windslabs on steep, leeward terrain at the upper elevations and in "cross-loaded" gullies where the wind has depostited the new snow. The most recent weather system is forecasted to bring rain to western Montana below 5,000' today, this will create perfect conditions for "loose-wet" avalanches through out the day Tuesday below treeline. 

Advisory
Click here to see the full advisory for 2018-03-23
March 23, 2018 at 6:59

Over the past 24 hours we've seen a big addition of weight to the snowpack in the form of rain.  Rain, not only adds a lot of weight to the snowpack but it also breaks down the structure of the snowpack.  Not a good thing for snow stability. The good news is...cold temperatures will soon start to freeze up the snowpack, making it stronger. Don't trust the snowpack yet, but it should trend in the right direction soon.

Advisory
Click here to see the full advisory for 2018-03-23
March 23, 2018 at 6:50

The buried surface hoar layers from the past two weeks are starting to become active with the new, heavy loading we are getting.  Watch the temperatures and keep an eye out for rollerballs; the potential for wet slides will increase throughout the day as the temperatures goes above freezing at lower elevations or the sun peaks through. Also watch for isolated pockets of windslabs that formed late last night and expect more to form throughout the weekend.

Advisory
Click here to see the full advisory for 2018-03-23
March 23, 2018 at 5:56

Cold temperatures have locked the upper snowpack together following Thursdays' warm and wet weather. Generally stable snowpack conditions will exist on Friday with the potential to find isolated pockets of wind slab at upper elevations on leeward terrain. Expect windslabs and stormslabs to increase in size and sensitivity going into the weekend.

Advisory
Click here to see the full advisory for 2018-03-23
March 23, 2018 at 5:52

Cold temperatures have locked the upper snowpack together following Thursdays' warm and wet weather. Generally stable snowpack conditions will exist on Friday with the potential to find isolated pockets of wind slab at upper elevations on leeward terrain. Expect windslabs and stormslabs to increase in size and sensitivity going into the weekend.

Advisory
Click here to see the full advisory for 2018-03-20
March 20, 2018 at 6:38

Isolated windslabs formed Sunday night and yesterday morning: look for pillowy looking snow.  Use caution in steep, unsupported terrain on the E-NE-N aspects where windslabs will still be lingering today.  As the temperatures go up with the sunshine today, expect to see pinwheels, rollerballs, and loose wet slides.  

Advisory
Click here to see the full advisory for 2018-03-20
March 20, 2018 at 6:23

 Sunday night, a quick moving storm left 9-11'' of snow above 4500'. The snow fell on a firm frozen surface, giving it a nice plane to slide on.  As the new snow settles, it will become a stiffer slab and potentially produce larger avalanches. If temperatures rise in the next couple days (as they're forecasted to do), be aware of a increasing avalanche danger.  Wet slab avalanches are likely. Spring snowpack is here! Get it while it's frozen!

Advisory
Click here to see the full advisory for 2018-03-20
March 20, 2018 at 5:32

Generally stable snowpack conditions exist in the mountains of the Kootenai. Use caution in steep, unsupported terrain on northeasterly aspects above 6,000' where isolated windslabs may persist.  Expect to see small "loose-wet" avalanches form on slopes exposed to solar radiation as the weather forecast is calling for partly sunny conditions through Wednesday.

Advisory
Click here to see the full advisory for 2018-03-16
March 16, 2018 at 6:29

Spring skiing and spring avalanche problems? Visit the SW -S- SE solar aspects. Heads up for roller balls, pinwheels, cornice falls, and natural wet slides as the day warms up to indicate the instability is rising.  Winter skiing and winter avalanche problems? Visit the NE - N - NW aspects. Heads up for lingering windslabs and always be checking for the persistent weak layers.  

Advisory
Click here to see the full advisory for 2018-03-16
March 16, 2018 at 5:45

There is potential to trigger deep weak layers on north aspects above 6,000', this potential is more prevalant in the Purcell Range. There are also large and unpredictable cornices looming above northeast aspects that should be avoided as the recent warm temperatures have caused them to weaken over the past weak.  Continue to pay attention to the weather as any rapid warming or sunshine will increase the likelihood of avalanches.

Advisory
Click here to see the full advisory for 2018-03-16
March 16, 2018 at 5:40

Consolidated snowpack with firm sun and raincrust with 1 inch of heavy snow on the surface.  Watch for cornice releases which have been the triggers for recent avalanches.  

Advisory
Click here to see the full advisory for 2018-03-13
March 13, 2018 at 6:52

Sunshine and warm temperatures will destabilize the upper portion of the snowpack throughout the day.  Avoid areas where loose wet slides have the potential for pushing you into terrain traps.  And pay attention above, cornices become weaker as the weather warms.  

Advisory
Click here to see the full advisory for 2018-03-13
March 13, 2018 at 6:21

The snowpack is going through a big change right now.  Spring is here...at least for a couple days. The warm temperatures have decreased the stability in the upper portions of the snowpack. We'll hit the climax of this warm weather today (possibly 50 degrees at 5000').  Natural avalanches will be possible today and human triggered avalanches likely. Make wise travel choices today and stay away from solar aspects especially under rock outcroppings.    

Advisory
Click here to see the full advisory for 2018-03-13
March 13, 2018 at 5:16

Warm afternoon temperatures will cause the snowpack to weaken as Tuesday is forecast to be another warm and sunny day. Avoid areas where "loose-wet" slides have the potential to injure you by pushing you into trees and cliffs. Cornices and glide cracks are also starting to weaken, the only way to manage this problem is to avoid being underneath them as temperatures rise during the day.

Advisory
Click here to see the full advisory for 2018-03-09
March 9, 2018 at 7:01

The storm that was called off ended up materializing with 6 -8" of heavy, dense snow and gusty SW winds. Watch for windslabs and storm slabs at the high elevations, and windslab development to continue throughout the day. Expect to see loose-wet avalanche activity in the lower elevations today and on the southern aspects as the sun hits them tomorrow.  

Advisory
Click here to see the full advisory for 2018-03-09
March 9, 2018 at 6:31

A winter storm has produced snow, rain and wind across the forecast area. 6-8'' of snow has fallen above 4800', but has been moved around with the wind.  The winds were primarily out of the SW which means the E-N faces could have significant wind loading. Expect the storm slab at higher elevations to be reactive. Natural avalanches are possible and human triggered avalanches are likely on slopes steeper than 35 degrees. Make good decisions and travel safely.

Advisory
Click here to see the full advisory for 2018-03-09
March 9, 2018 at 5:53

Strong winds and storm-snow have created slabs above 5,000', use caution on all steep slopes over 35.°  Leeward terrain directly below ridgelines will be the primary features of concern at upper elevations through the weekend.  Expect to see loose-wet avalanche activity at lower elevations and use caution in areas where these slow moving slides have the potential to push you into high consequence terrain such as gullies, trees or cliffs.

Advisory
Click here to see the full advisory for 2018-03-06
March 6, 2018 at 6:57

Small storms, light winds, and mild temperatures have helped stabilized the upper snowpack this week.  Caution is still needed in steep, high consequence terrain where loose dry avalanches are a possibility.  The persistent weak layer is still showing its face in some locations, so it is important that you check your location by digging down.  

Advisory
Click here to see the full advisory for 2018-03-06
March 6, 2018 at 6:20

The Cabinets and Selkirk mountains have been getting light density snow over the past 48 hours.  Scroll down to the avalanche problems to see what we're saying about the avalanche danger.  IPAC sends it's condolences to the friends and families of the avalanche victims in Washington state.  We're sad to report, 6 people have lost their lives in avalanches in Washington over the past week.  Know what avalanche terrain is and practice safe travel techniques.

Advisory
Click here to see the full advisory for 2018-03-06
March 6, 2018 at 5:29

Mild temperatures and a lack of wind have stabilized the upper snowpack. Use caution in steep, high consequence terrain on all aspects where loose-dry sloughing could cause a loss of control. Also keep in mind the potential to trigger deep weaknesses in the Purcell Range where the snowpack is thinner and potentially more sensitive to triggers.

Advisory
Click here to see the full advisory for 2018-03-02
March 2, 2018 at 6:54

Stability issues from wind effected snow will be your main concern today.  Mountains picked up a couple inches.  Temperatures in the mountains remained below freezing and surface snow will be easily transported by the forecast winds today and tonight.  New snow is expected and this will also add to stress on windloaded aspects.  You'll find good traveling in most terrain but remain cautious of steep lee aspects with cornice formation and sparse vegetation to protect from triggering unstable wind slabs.

Advisory
Click here to see the full advisory for 2018-03-02
March 2, 2018 at 6:53

A series of small storms has been tracking across the Silver Valley, depositing a few inches yesterday and last night.  The smaller amounts in these storms accompanied by steady moderate temperatures have allowed these layers to bond, but have provided new fuel for windloading each day.  Expect windslab formation at the ridgelines. 

Advisory
Click here to see the full advisory for 2018-03-02
March 2, 2018 at 4:42

The moderate temperatrures and lack of addtional loading has allowed the upper snowpack to strengthen significantly since last weekends storm. Triggering a windslab on leeward terrain at treeline and above is still a possibility. The facet layer above the February 4th rain crust is also healing but still harbors the potential to be triggered and should be given consideration in steep and open terrain above treeline.

Advisory
Click here to see the full advisory for 2018-03-01
March 1, 2018 at 21:07

Stability issues from wind effected snow will be your main concern today.  Mountains picked up a couple inches.  Temperatures in the mountains remained below freezing and surface snow will be easily transported by the forecast winds today and tonight.  New snow is expected and this will also add to stress on windloaded aspects.  You'll find good traveling in most terrain but remain cautious of steep lee aspects with cornice formation and sparse vegetation to protect from triggering unstable wind slabs.

Advisory
Click here to see the full advisory for 2018-02-27
February 27, 2018 at 8:16

New storm snow and strong Southwesterly winds have created sensitive slabs in steep terrain above 5,000' on all aspects.  Use caution on steep slopes until this new snow has had time to settle and strengthen.

Advisory
Click here to see the full advisory for 2018-02-27
February 27, 2018 at 7:00

The region recieved a substantial amount of new snow and high winds over the weekend, over 20 inches in most places. We saw extensive windslab development in the higher elevations. Yesterday was a brief respite from those winds, but overnight they picked up to transport speed again and will be accompanied by another shot of precipitation today.  Expect sensitive windslabs on leeward aspects and allow time for the storm slabs to stabilize.  

Advisory
Click here to see the full advisory for 2018-02-27
February 27, 2018 at 6:52

The new snow across the Selkirk and Cabinet mountains have made for some powdery conditions! Be aware of soft slab potential near and above treeline. The light snow on the surface isn't a big concern right now, but we're looking at 15-20'' more by this weekend. As more snow falls, your internal 'red light' should be getting brighter. Expect the avalanche danger to increase over the next couple days.

Advisory
Click here to see the full advisory for 2018-02-26
February 26, 2018 at 21:44

New storm snow and strong Southwesterly winds have created sensitive slabs in steep terrain above 5,000' on all aspects.  Use caution on steep slopes until this new snow has had time to settle and strengthen.

Advisory
Click here to see the full advisory for 2018-02-23
February 23, 2018 at 5:13

The wind slabs and weak layers under last weekends' storm snow have strengthened significantly this week. The potential still exists to trigger an avalanche in these variable wind deposits and stubborn weak layers. Use caution in steep terrain, particularly on Southwesterly aspects.  Weather forecasts are predicting significant storm snow Saturday thru Sunday so expect avalanche danger to potentially rise with new snow and wind.

Advisory
Click here to see the full advisory for 2018-02-22
February 22, 2018 at 18:54

Snowpack is consolidating with light powder on the surface where it is not wind affected.  Assess upper elevation ridgetops and wind affected areas greater than 35 degrees as it is highly variable.  

Advisory
Click here to see the full advisory for 2018-02-22
February 22, 2018 at 18:54

Snowpack is consolidating with light powder on the surface where it is not wind affected.  Assess upper elevation ridgetops and wind affected areas greater than 35 degrees as it is highly variable.  

Advisory
Click here to see the full advisory for 2018-02-20
February 20, 2018 at 6:57

The storm slabs and wind slabs from the President's Weekend storms are still working on stabilizing after such a big and rapid load.  Most areas are resting on a layer of weak facets and the slick rain crust sliding surface. When headed into the backcountry, use careful snowpack evaluation, cautious route-finding and conservative decision making. 

Advisory
Click here to see the full advisory for 2018-02-20
February 20, 2018 at 6:53

After a week of good snow and strong winds we'll be hanging out in a cold high pressure for the next 24 hours. There was a lot of reverse loading above treeline and near ridges. Areas that are normally thought of as leeward slopes may have newly formed wind slabs on them.  We're getting initial information about a snowmobile triggered avalanche in Echo bowl yesterday. No details yet... Stay safe out there!

Advisory
Click here to see the full advisory for 2018-02-20
February 20, 2018 at 5:09

Sensitive storm snow and wind slabs are resting on a layer of weak facets and a slick bed surface.  Steep terrain (over 30°) should be avoided on all aspects and elevations until this new snow has had time to settle and strengthen.

Advisory
Click here to see the full advisory for 2018-02-16
February 16, 2018 at 7:31

Currently 10 inches of recent storm snow sitting atop an ice crust.  There is some wind affect and slight suncrust on top of the current surface.  A series of storms will be rolling in with breezy conditions forming wind slabs and loading on Noreasterly aspectsAvalanche danger will be on the rise throughout the weekend with the brunt of the storm coming in Saturday.  Red flags will be heavy precipitation and winds.  

Advisory
Click here to see the full advisory for 2018-02-16
February 16, 2018 at 6:59

The weekend is about to roll in with a bang weather wise.  Going into Friday morning with an overall fairly stable snowpack, but the snow accumulation is going to ramp up throughout the day today and not stop until Sunday night.  Storm totals could exceed 4 feet in areas and will be accompanied by strong winds.  Expect the avalanche danger to increase throughout Saturday and Sunday.  Significant snowfall and strong winds are two of the avalanche red flags. 

Advisory
Click here to see the full advisory for 2018-02-16
February 16, 2018 at 5:34

Expect avalanche danger to change rapidly going into the weekend with strong winds and heavy snowfall forecasted for Saturday and Sunday.   This new snow will be falling on a multitude of weak layers that will take multiple days to settle and strengthen.

Advisory
Click here to see the full advisory for 2018-02-13
February 13, 2018 at 6:59

The cold front that has swept through the region has done a good job of locking up the snowpack and increasing stability.  The gusty winds we've been having created isolated windslabs on leeward aspects near our ridgelines.  Heads up for the new storm coming in starting tonight, with the potential for over a foot of new snow to fall on a potentially slick bed surface.  

Advisory
Click here to see the full advisory for 2018-02-13
February 13, 2018 at 6:51

Cold temperatures and strong winds have driven some change in the snowpack. The cold temperatures over the past 72 hours have frozen the top of the snowpack. It's pretty locked up and won't change to much until we see warmer temperatures or more snow. Meanwhile...the strong winds have transported a fresh wind slab on to windward slopes.  These newly formed wind slabs are sitting on older wind slabs that are capable of breaking off in the form of an avalanche

Advisory
Click here to see the full advisory for 2018-02-13
February 13, 2018 at 5:27

High winds have created isolated windslabs on leeward aspects near ridgelines and gullies.  Use caution in high exposed terrain, particularly in the East Cabinets. Anticipate a significant increase in avalanche danger as storm snow is predicted to return on Wednesday.  The current forecast is predicting up to a foot of new snow to fall, this new snow will likely be very sensitive through the week as it will be resting on a slick bed surface in many locations.

Advisory
Click here to see the full advisory for 2018-02-09
February 9, 2018 at 7:03

With temperatures mostly above freezing since February 5th in the mountains  most of our precipitation has been rain from 6300 feet down until last night.  The pack has firmed up with about 3-4 inches of snow ontop of an melt freeze icecrust that is more prominent  below 6000 feet.  Extreme upper elevations have a more dense snow surface with lighter powder on top.  

Advisory
Click here to see the full advisory for 2018-02-09
February 9, 2018 at 7:03

With temperatures mostly above freezing since February 5th in the mountains  most of our precipitation has been rain from 6300 feet down until last night.  The pack has firmed up with about 3-4 inches of snow ontop of an melt freeze icecrust that is more prominent  below 6000 feet.  Extreme upper elevations have a more dense snow surface with lighter powder on top.  

Advisory
Click here to see the full advisory for 2018-02-09
February 9, 2018 at 6:58

The forecast is back to winter-like temperatures, which will help lock up all the moisture we've been seeing in the pack this week and increase the stability.  Variable amounts of snow (1-5") fell across the forecast region last night, creating the potential for windslab formation. It is important as backcountry users that we evaluate the snow and terrain carefully to identify these areas.  

Advisory
Click here to see the full advisory for 2018-02-06
February 6, 2018 at 7:04

The recent precipitation pattern has injected a lot of heat into the snowpack (here) accompanied by average air temperatues being above freezing for the last four days has led to an unstable snowpack. Overnight loading of an additional 0.5 to 1" of snow water equivalent (3 to 7" of snow) has further destabilized the pack. It is important to pay attention to these spring like conditions and not become complacent because the snowpack is stable at lower elevations.  

Advisory
Click here to see the full advisory for 2018-02-06
February 6, 2018 at 6:50

Since our last advisory, the Selkirks and Cabinets have seen rain and wind. The rain has saturated the lower elevation snowpack while the wind at higher elevations has transported a fresh slab of snow onto leeward slopes. The rain line in most area was around 5000 ft. Be aware of the different snow conditions at different elevations and aspects. Be cautious on wind loaded slopes near ridges. 

Advisory
Click here to see the full advisory for 2018-02-06
February 6, 2018 at 4:47

Use caution on steep slopes above 6,000' in elevation as recent storm snow has yet to fully bond to the existing snowpack.  A slide triggered on this storm snow also retains the possibility of steeping down to deeper weak layers at this elevation as well.

Advisory
Click here to see the full advisory for 2018-02-02
February 2, 2018 at 6:22

It's Groundhog's Day and we are still caught in a time loop of the same three avalanche problems.  Storm slabs, windslabs, and persistent slabs. Expect avalanche danger to increase as we get more snow loading during the day on Friday accompanied by gusty winds and then changing to higher density snow/rain on Friday night.  Assess the terrain at each location by digging down into the snow to identify the layers at your location. Use cautious route-finding and conservative decision-making choices.  

Advisory
Click here to see the full advisory for 2018-02-02
February 2, 2018 at 5:17

At elevations above 6,000' there is the potential to trigger isolated wind slabs and thin storm slabs on all aspects with the incoming weather.  These smaller avalanches also have the potential to step down to weaker layers in the snowpack at upper elevations and create larger slides.  Below 6,000' the warm temperatures from Monday have bonded the upper snowpack under a thick, supportive crust layer.

Advisory
Click here to see the full advisory for 2018-02-01
February 1, 2018 at 16:53

In that past 5-7 days we have received steady snowfall, witnessed above freezing temperatures, and endured some rain.  This has created new surface layers and also helped to stabilize some problem layers last week.  Eric revealed two ice crusts in the upper 18 inches that could present problems with enough new snow or windloaded snow.  Normal caution is advised up high but use caution.   Problem weak layers are more likely in northerly aspects on large, steep, exposed and open terrain.

Advisory
Click here to see the full advisory for 2018-01-30
January 30, 2018 at 6:58

Our snowpack continues to gain strength from the past weekend storms, but strong winds came in overnight with new snowfall leading to windslab development.  Todays weather will continue to lend to windslab development. Expect to find windslabs on the northeasterly aspects as well as storm slabs on all aspects above 5000'. Buried weak layers of variable distribution also warrant conservative terrain selection.  Assess the snowpack in each place you plan to ride or slide

Advisory
Click here to see the full advisory for 2018-01-30
January 30, 2018 at 6:30

A new advisory and a new avalanche problem to talk about! Even though buried persistent layers and deep slab instabilities are still a concern, the bigger issue is the precipitation falling on the snowpack right now. Upper elevations are seeing light snow and strong winds while the lower elevations are seeing rain.  Be aware of wind transported snow up high and rain on snow down low.  Based on temperatures, it looks like the rain snow line is at 4,500-5,500 ft.

Advisory
Click here to see the full advisory for 2018-01-30
January 30, 2018 at 5:21

Monday night came in with high winds and light snowfall at the upper elevations.  Expect to find windslabs of variable thickness in the highest terrrain on northeasterly aspects and stormslabs on all aspects above 6,000.'  The strength, thickness and reactivity of these slabs will vary greatly with the rapidly changing weather pattern we are currently experiencing.  Approach steep terrain above 6,000' with caution.

Advisory
Click here to see the full advisory for 2018-01-26
January 26, 2018 at 6:57

With the previous storm depositing a generous amount of snow and transport speed winds moving that snow around, there has been a lot of loading. We are forecasted to recieve even more snow with gusty winds, adding to this load. Avalanche danger will increase during the forecast period as the weekend storm systems roll through.  

Advisory
Click here to see the full advisory for 2018-01-26
January 26, 2018 at 5:52

Expect to find sensitive windslabs on leeward terrain (north and east aspects) directly below ridglines above 5,000' and in cross-loaded terrain that has been affected by southwesterly winds.  These slabs have the potential to thicken and increase in sensitivity going into the weekend.  In exposed alpine terrain above 6,000'  new storm snow will also cause concern as the incoming weather brings more load to the snowpack.

Advisory
Click here to see the full advisory for 2018-01-25
January 25, 2018 at 22:44

Recent natural, snowmobile and skier avalanches have been observed with the recent storm since Thursday in the forecast area.  Some areas are more reactive than others but we have consistent persistant weak layers in the snowpack across the board.  New storm snow has been reactive 1-2 feet deep with potential to trigger weak layers deeper in the pack.  

Advisory
Click here to see the full advisory for 2018-01-25
January 25, 2018 at 7:10

Over the past 24 hours the mountains have received a generous amount of snow.  Westerly winds, stronger to the north, have been loading new snow.  Temperatures also rose to near or above freezing creating a heavier layer of snow overlying a less dense layer.  This is the primary weak layer of concern, heavy new snow over lighter snow, and was found to be very weak yesterday.  Windloaded new snow could be a concern today.  Travel in avalanche terrain not recommended.

Advisory
Click here to see the full advisory for 2018-01-25
January 25, 2018 at 7:10

Over the past 24 hours the mountains have received a generous amount of snow.  Westerly winds, stronger to the north, have been loading new snow.  Temperatures also rose to near or above freezing creating a heavier layer of snow overlying a less dense layer.  This is the primary weak layer of concern, heavy new snow over lighter snow, and was found to be very weak yesterday.  Windloaded new snow could be a concern today.  Travel in avalanche terrain not recommended.

Advisory
Click here to see the full advisory for 2018-01-25
January 25, 2018 at 7:10

Over the past 24 hours the mountains have received a generous amount of snow.  Westerly winds, stronger to the north, have been loading new snow.  Temperatures also rose to near or above freezing creating a heavier layer of snow overlying a less dense layer.  This is the primary weak layer of concern, heavy new snow over lighter snow, and was found to be very weak yesterday.  Windloaded new snow could be a concern today.  Travel in avalanche terrain not recommended.

Advisory
Click here to see the full advisory for 2018-01-23
January 23, 2018 at 6:56

Snowpack conditions are variable across the advisory region.  Heightened avalanche conditions exist on specific terrain features and require careful evaluation.  Observations of instabilities around the region include: buried surface hoar, windslabs, buried ice crusts with facets, and in some locations still the deep persistent weak layer. Slope specific evaluation is needed before skiing or riding. 

Advisory
Click here to see the full advisory for 2018-01-23
January 23, 2018 at 6:38

The buried surface hoar layers that has kept us at an elevated avalanche danger rating is still alive and well. Don't let your guard down...in fact, we might see an increase in danger as this next storm arrives and puts a bigger a load on top of the weak layers.  The storm that has arrives looks to strong with the likelyhood of producing up to 2' of snow at upper elevations by Friday. Stay tuned...We'll keep you updated.

Advisory
Click here to see the full advisory for 2018-01-23
January 23, 2018 at 6:38

The buried surface hoar layers that has kept us at an elevated avalanche danger rating is still alive and well. Don't let your guard down...in fact, we might see an increase in danger as this next storm arrives and puts a bigger a load on top of the weak layers.  The storm that has arrives looks to strong with the likelyhood of producing up to 2' of snow at upper elevations by Friday. Stay tuned...We'll keep you updated.

Advisory
Click here to see the full advisory for 2018-01-19
January 19, 2018 at 5:52

Due to strong southwesterly winds and moist snow we have thick, sensitive wind slabs lurking on leeward terrain features and fresh storm snow above 5,000'.  Avoid committing to steep slopes directly below ridge lines on north and east aspects.  Approach any slope over 35° with strong caution in terrain above 5,000'.

Advisory
Click here to see the full advisory for 2018-01-18
January 18, 2018 at 20:58

Significant windloading and recent snowfall from yesterday mornings storm has formed deep windslabs near ridgetops on N, NE, and E aspects near 6000 foot range.  This has increased the load on buried surface hoar about 2 feet down (deeper in windloaded areas).  With the recent snowfall and warmer temperatures yesterday wind slab avalanches will become more reactive to human triggers.  Cautious route finding is key in our current snowpack state.   

Advisory
Click here to see the full advisory for 2018-01-18
January 18, 2018 at 20:58

Significant windloading and recent snowfall from yesterday mornings storm has formed deep windslabs near ridgetops on N, NE, and E aspects near 6000 foot range.  This has increased the load on buried surface hoar about 2 feet down (deeper in windloaded areas).  With the recent snowfall and warmer temperatures yesterday wind slab avalanches will become more reactive to human triggers.  Cautious route finding is key in our current snowpack state.   

Advisory
Click here to see the full advisory for 2018-01-16
January 16, 2018 at 6:11

Even though the northern panhandle hasn't see snow in a couple days don't get tricked into thinking the snowpack is healed! The problem layers under the surface are alive and well... just waiting for the right trigger. Keep your guard up- Dangerous avalanche conditions still exist! Thank you everyone for the awesome observations recently! They've been really helpful!

Advisory
Click here to see the full advisory for 2018-01-16
January 16, 2018 at 5:01

The upper elevations above tree-line are still harboring a dense slab of snow from the last storm cycle.   Stability tests are showing that the snowpack is strengthening; but, large open slopes and wind loaded terrain should be approached with caution.  

Advisory
Click here to see the full advisory for 2018-01-16
January 16, 2018 at 4:43

The upper above tree-line elevations are still holding storm slabs from the last storm cycle.  Stability tests are showing that the snowpack is strengthening; but careful snowpack evaluation and cautious route finding are required in the high country. 

Advisory
Click here to see the full advisory for 2018-01-12
January 12, 2018 at 6:22

The recent storm has left more than 2 feet of snow in most locations. The new snow fell on top of a couple weak layer resulting in dangerous avalanche conditions.  Travel is not recommended in avalanche terrain.  Storm slabs are usually the weakest in the 24-48 hours after a storm. Yesterday, we found the storm slab was not bonding well to the old snow underneath.  Thank you to Schweitzer Mountain for sponsoring our forecast today! 

Advisory
Click here to see the full advisory for 2018-01-12
January 12, 2018 at 6:22

The recent storm has left more than 2 feet of snow in most locations. The new snow fell on top of a couple weak layer resulting in dangerous avalanche conditions.  Travel is not recommended in avalanche terrain.  Storm slabs are usually the weakest in the 24-48 hours after a storm. Yesterday, we found the storm slab was not bonding well to the old snow underneath.  Thank you to Schweitzer Mountain for sponsoring our forecast today! 

Advisory
Click here to see the full advisory for 2018-01-12
January 12, 2018 at 6:22

The recent storm has left more than 2 feet of snow in most locations. The new snow fell on top of a couple weak layer resulting in dangerous avalanche conditions.  Travel is not recommended in avalanche terrain.  Storm slabs are usually the weakest in the 24-48 hours after a storm. Yesterday, we found the storm slab was not bonding well to the old snow underneath.  Thank you to Schweitzer Mountain for sponsoring our forecast today! 

Advisory
Click here to see the full advisory for 2018-01-12
January 12, 2018 at 16:10

New snow, strong winds and multiple weak layers have created dangerous avalanche conditions at upper elevations.  Now is an easy time to make smart decisions, stay on low angle terrain and give steep slopes a wide berth. This new snow and wind slab will need time to come together.  Strong caution is advised on all terrain above 5,000'.

Advisory
Click here to see the full advisory for 2018-01-11
January 11, 2018 at 18:42

New snow, strong winds and multiple weak layers have created dangerous avalanche conditions at upper elevations.  Now is an easy time to make smart decisions, stay on low angle terrain and give steep slopes a wide berth. This new snow and wind slab will need time to come together.  Strong caution is advised on all terrain above 5,000'.

Advisory
Click here to see the full advisory for 2018-01-09
January 9, 2018 at 6:41

Most of the forecast region received rain over the past couple days.  The rain in most areas has frozen into a firm crust on or near the surface.  Once that crust gets more snow on it, it could be problematic. Rain crusts can make nice sliding surfaces. Let's hope the next storm comes in wet and turns dry. Wet snow will have a much better chance of sticking to that rain crust then a dry slab would. 

Advisory
Click here to see the full advisory for 2018-01-09
January 9, 2018 at 6:41

Most of the forecast region received rain over the past couple days.  The rain in most areas has frozen into a firm crust on or near the surface.  Once that crust gets more snow on it, it could be problematic. Rain crusts can make nice sliding surfaces. Let's hope the next storm comes in wet and turns dry. Wet snow will have a much better chance of sticking to that rain crust then a dry slab would. 

Advisory
Click here to see the full advisory for 2018-01-09
January 9, 2018 at 5:13

Heavy mountian snows and high winds are forecast for the coming week.  This will further bury a layer of weak surface hoar and create touchy slab conditions.  Expect this slab to thicken and become more dangerous as the week progresses!

Advisory
Click here to see the full advisory for 2018-01-05
January 5, 2018 at 6:58

The lack of snow over the past week has given the layers of snow near the surface (storm slabs) a chance to strengthen. Don't let your guard down though...There are still 2 layers deep in the snowpack that can be woken up if triggered.  Even though the snowpack is healing, it's still quietly near a tipping point.  Don't get tempted to test mother nature right now.  Keep a conservative approach to your terrain selection and keep your group in sight. 

Advisory
Click here to see the full advisory for 2018-01-05
January 5, 2018 at 6:48

This week has seen clear skies and gradual improvement in stability with another cycle of surface hoar development on the denser layer from the 12/30 storm (note: first hand inspection, this is not a full on rain crust).  All the new loading of the past two weeks has buried the persistent layer under 2 to 3 feet of snow and even deeper in windloaded areas. Be cautious of this layer as a slide of this depth would be catastrophic.  

Advisory
Click here to see the full advisory for 2018-01-05
January 5, 2018 at 5:14

The Kootenai snowpack is becoming progressively stronger with moderate temperatures.  Stay safe this weekend by practicing safe travel habits such as commiting one rider to a slope at a time, watching your parters and parking in safe locations where you will be an asset rather than a victim if your partners triggers a slide.

Advisory
Click here to see the full advisory for 2018-01-02
January 2, 2018 at 7:00

The snowpack went through the ringer over the holiday weekend, recieving up to 2ft+ of snow and then some rain/mixed precipitation on top of that.  Even though the snowpack is starting to heal and get stronger, there are multiple persistent weak layers that can be triggered causing an avalanche.  Be conservatice in your decision making and route finding, dangerous avalanche conditions still exist but are slowly strengthening. 

Advisory
Click here to see the full advisory for 2018-01-02
January 2, 2018 at 5:48

The snowpack is beginning to heal after a to 2+ ft. deposit of snow across the region last week. Even though the snowpack is getting stronger, there are still multiple persistent weak layers that can be easily triggered causing avalanches.  Be conservative in your decision making and route finding. There's plenty of good snowmobiling and skiing to be had out there if you choose your terrain appropriately.  Dangerous avalanche conditions still exist but are slowly strengthening day by day. 

Advisory
Click here to see the full advisory for 2018-01-02
January 2, 2018 at 5:26

Heightened avalanche conditions exist at the upper elevations due to wind slabs from last weekends storm.  At lower elevations multiple slab layers persist but are proving to be less reactive in stability tests.  Stay safe by practicing safe travel habits as these more stubborn slabs can lull one into complacency by reinforcing bad habits and a false sense of security.

Advisory
Click here to see the full advisory for 2017-12-29
December 29, 2017 at 6:49

Heavy snowfall has been and is currently falling and will continue throught the advisory period with snowfall rates up to an inch an hour.  Avalanche activity is expected to increase during the advisory period.  Storm slabs can be triggered easily by skiers.  Windloading has occured on the SE - N aspects, with extensive windslabs and cornices observed at the higher elevations. Careful snowpack evaluation, cautious route-finding and conservative decision making are essential in the backcountry today. 

Advisory
Click here to see the full advisory for 2017-12-29
December 29, 2017 at 5:41

A winter storm has been dropping steady snow for the last 24 hours and is expected to clobber the mountains of NW Montana Friday night and into Saturday.  Expect the potential for natural and human triggered avalanches to rise throughout the weekend as more snow and wind pour into the area.  Stick to lower angle terrain and ridgelines until this new snow has had time to settle and bond.  Remember rapid changes in weather cause rapid changes in snow stability.

Advisory
Click here to see the full advisory for 2017-12-28
December 28, 2017 at 20:55

Red flags are evident with increasing and recent snowfall moderate to heavy, breezy and gusty winds, observed whumphing.  With the continued precipitation and warming temperatures expect more weight and strain our persistent weak layers 2-3 feet down in the snowpack.  Expect to see some natural avalanche activity and whumphing and cracking the next few days until things settle.  

Advisory
Click here to see the full advisory for 2017-12-27
December 27, 2017 at 6:11

The snowpack and its weak layers are gaining strength but still have the potential to fail and create large avalanches due to the thicknesses of this layer and the weak, sugary snow below it. 

Advisory
Click here to see the full advisory for 2017-12-26
December 26, 2017 at 7:00

The cold temperatures over the Holiday Weekend didn't help the snowpack stabilize much; there is still a likelyhood of triggereing a persistent slab avalanche. Carefully assess the snowpack and allow for a large margin of error when choosing terrain.  New snow is expected tonight and tomorrow which will continue to stress the weak layers. Look for clues from the snowpack, shooting cracks, and localized collapsing.  

Advisory
Click here to see the full advisory for 2017-12-26
December 26, 2017 at 7:00

The cold temperatures over the Holiday Weekend didn't help the snowpack stabilize much; there is still a likelyhood of triggereing a persistent slab avalanche. Carefully assess the snowpack and allow for a large margin of error when choosing terrain.  New snow is expected tonight and tomorrow which will continue to stress the weak layers. Look for clues from the snowpack, shooting cracks, and localized collapsing.  

Advisory
Click here to see the full advisory for 2017-12-26
December 26, 2017 at 7:00

The cold temperatures over the Holiday Weekend didn't help the snowpack stabilize much; there is still a likelyhood of triggereing a persistent slab avalanche. Carefully assess the snowpack and allow for a large margin of error when choosing terrain.  New snow is expected tonight and tomorrow which will continue to stress the weak layers. Look for clues from the snowpack, shooting cracks, and localized collapsing.  

Advisory
Click here to see the full advisory for 2017-12-26
December 26, 2017 at 17:49

The snowpack and its weak layers are gaining strength but still have the potential to fail and create large avalanches due to the thicknesses of this layer and the weak, sugary snow below it.  Keep in mind that most avalanche accidents occur on days when the hazard rating is considerable or moderate.

Advisory

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