Avalanche Forecast Archives

2016 – 2017 Season

Avalanche Advisory for Thursday, February 9, 2017

Date: February 9, 2017
This advisory will expire at Midnight. Huntington Ravine will have HIGH and CONSIDERABLE avalanche danger today. Central, Pinnacle, Odell, and South will have High avalanche danger. Natural avalanches will become likely and human-triggered avalanches, very likely. All other forecast areas in Huntington will have Considerable avalanche danger. Natural avalanches will be possible and human-triggered avalanches […]

Avalanche Advisory for Wednesday, February 8, 2017

Date: February 8, 2017
The main avalanche concern today will be Wet Slab. If the weather forecast pans out and temperatures drop as slowly as predicted, avalanche danger will remain at this heightened level for most of the day as stabilization will be slow to occur. Limited visibility this morning revealed wet debris in Hillman’s Highway and some of the steeper gullies on the Boott Spur ridge. As some gullies appear to not have avalanched yesterday, these places without debris are of greatest concern. The snowpack may see an additional stresses today from possible snow and sleet as well as temperatures that are hovering around the freezing mark.

Avalanche Advisory for Tuesday, February 7, 2017

Date: February 7, 2017
Today, Wind Slab will form. Avalanche danger will increase as the day progresses. Accumulating snow today (up to six inches during the daylight hours today and up to another six inches tonight) along with shifting winds that will increase are obvious red flags. With winds currently shifting to the SE, the most avalanche prone slopes this morning include: Left Gully, Hillman’s Highway and Central through Escape Hatch. As winds shift to the W during the afternoon and snowfall continues, all forecast areas will see significant loading. By nightfall, some areas rated Considerable will be pushing the upper end of that rating and when this advisory expires at midnight, all forecast areas will likely be into a High rating.

Avalanche Advisory for Monday, February 6, 2017

Date: February 6, 2017
Wind slabs have once again made a comeback as our primary avalanche problem. Even in the steepest and most wind-sheltered areas rated at “moderate” avalanche danger, the slabs will be stubborn to trigger but a weak layer of softer snow does exist beneath. Smaller pockets of softer wind slabs are also scattered around the terrain, mixed with the predominately firm slab. Yesterday, most surfaces were just bootable and edge-able but crampons are a good call due to the wind hammered nature of the slabs. As history shows, even the inch of snow forecast through the day on diminishing winds can drift into pockets of wind slab. Some skiable and rideable snow will exist today but in limited amounts in areas well sheltered from the high, westerly winds. Hard wind slabs of most concern may be found in the steepest terrain with drifts and sluff piles.

Avalanche Advisory for Sunday, February 5, 2017

Date: February 5, 2017
Wind Slab that has formed over the past week is becoming firmer due to sustained west winds. With 2” of new snow forecast later in the day along with increasing winds, instability will increase as the snow arrives. If traveling late in the day, be sure to evaluate terrain carefully and identify features of concern as wind slab will develop rapidly in steep areas due to strong winds. These same winds that are loading the steepest areas of our terrain with textured firm slab are also scouring the northern gullies in both Ravines. Areas with a Low rating today may contain unstable pockets around isolated terrain features.

Avalanche Advisory for Saturday, February 4, 2017

Date: February 4, 2017
Steady snow showers and strong west winds over the past several days have created Wind Slab, a trend that will continue today. Avalanche danger will stay steady today as conditions will not favor stabilization nor increasing instability. Moderate rated areas on the south side of both ravines contain a good amount of snow and should be heeded with care; evaluate snow and terrain carefully. Right Gully and Lobster Claw have seen some scouring in the upper reaches during the steady upslope snow since the start of the month and will offer easier safe passage than other gullies with a similar rating.

Avalanche Advisory for Friday, February 3, 2017

Date: February 3, 2017
This advisory expires at Midnight. Huntington Ravine has MODERATE avalanche danger today. All forecast areas in Huntington have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Evaluate snow and terrain carefully to identify features of concern.  Tuckerman Ravine has CONSIDERABLE and MODERATE avalanche danger today. Sluice, Lip, Center Bowl, and […]

Avalanche Advisory for Thursday, February 2, 2017

Date: February 2, 2017
Wind slab avalanches will continue to be a problem. Recent wind speeds and available snow have been ripe for the growth of these slabs, especially in the strong lee areas of a westerly wind where larger slabs have developed. Anticipate smaller but still potentially dangerous areas of wind slabs in moderate rated areas with a highly variable snow surface from firm barely edge-able snow to softer drifts. Careful snowpack evaluation and cautious route finding are essential today.

Avalanche Advisory for Wednesday, February 1, 2017

Date: February 1, 2017
Wind Slab formed over the past few days and new wind slab will form today. Avalanche danger will increase today as winds increase and snow accumulates. The terrain above the ravines contain plenty of snow available for transport. This will start blowing into the Ravines as winds shift and increase today. Even if the snowfall today is at the lower end of the forecasted 2-4”, we will likely see widespread new wind slab due to wind transport. This will make for limited visibility which will hamper route-finding.

Avalanche Advisory for Tuesday, Jaunary 31, 2017

Date: January 31, 2017
This advisory expires at midnight. Huntington Ravine has MODERATE avalanche danger. Natural avalanches are unlikely and human-triggered avalanches are possible. Heightened avalanche conditions exist on specific terrain features. Evaluate snow and terrain carefully. Tuckerman Ravine has CONSIDERABLE, MODERATE, and LOW avalanche danger. Sluice and the Lip have Considerable danger. Natural avalanches are possible and human-triggered […]

Avalanche Advisory for Monday, January 30, 2017

Date: January 30, 2017
Soft Wind Slabs sensitive to human-triggering developed over the past 36 hours and will continue to grow in size today. While winds may be light, snow that arrived yesterday is light enough in density that wind transport will continue. Signs of blowing snow are visible now as well as the formation of small cornices on top of areas like the Boott Spur gullies. Sluff piles are showing under the steepest terrain in both ravines as well as dry-loose debris below Chute, Left Gully and Hillman’s Highway. The red flags are up today, make sure to take note.

Avalanche Advisory for Sunday, January 29, 2017

Date: January 29, 2017
...wind slabs along with newer softer wind slabs should remain on your radar as you move into steep terrain today. The high velocity of the winds over the past several days has most likely created a wide mix a stiffness to these slabs, with the majority of them most likely being fairly stubborn in most areas. The northern gullys in both Ravines, while still having a moderate danger rating, are probably more scoured than loaded but new wind slabs will develop today. East facing areas served as a deposition zone for the snow which fell over the past few days and most likely went through a natural avalanche cycle during that time. Softer and smaller wind slabs are also in the mix due to the inch of snow that fell last night plus another inch or two falling today. These slabs will be much more sensitive to human-triggering and could result in a fairly significant avalanche if we receive the upper end of the forecast snow fall.

Avalanche Advisory for Saturday, January 28, 2017

Date: January 28, 2017
Natural wind slab avalanches are possible in both Ravines today. High winds and continuous snowfall for the past 2 days has built fairly thick wind slabs. History has shown that these wind slabs will exist in middle start zones such as beneath the ice in the Center Bowl, around the fork of Hillmans and on the approaches and middle pitches of climbs in Huntington. Strong westerly winds tend to scour northern gullies in Huntington Ravine. Natural avalanches are less likely in Lobster Claw and Right Gully but smaller and still dangerous human-triggered avalanches could occur there.

Avalanche Advisory for Friday, January 27. 2017

Date: January 27, 2017
This advisory expires at Midnight. Tuckerman Ravine has HIGH and CONSIDERABLE avalanche danger. The Lip, Center Bowl and Chute have High avalanche danger. Natural avalanches are likely and human-triggered avalanches are very likely. All other forecast areas have Considerable avalanche danger. Natural avalanches are possible and human-triggered avalanches are likely.  Huntington Ravine has CONSIDERABLE avalanche […]

Avalanche Advisory for Thursday, January 26, 2016

Date: January 26, 2017
The main concern today will be loose-dry avalanches in steep terrain today. These avalanches could be very heavy due to the high water content of recent precipitation and could cause some significant problems over a bad runout, cliff or terrain trap. Primary locations would be beneath steep terrain where sleet mixed with snow may have pooled deeply as well as areas with a north facing lee component like Escape Hatch, South and Hillman’s Highway. An icy glaze capping the snow and 24 hours of conditions favorable for settlement have reduced our propagation concerns that could lead to the fracture of a wind slab but limited visibility and field observations does create some uncertainty. Travel carefully despite the rating today.

Avalanche Advisory for Wednesday, January 25, 2017

Date: January 25, 2017
This advisory expires at midnght. Huntington and Tuckerman Ravine have MODERATE avalanche danger. Natural avalanches are unlikely and human-triggered avalanches are possible. Heightened avalanche conditions exist on specific terrain features. Evaluate snow and terrain carefully. Little Headwall and Lower Snowfields are not forecast due to thin snow cover. AVALANCHE PROBLEM: Wind Slab formed Monday night […]

Avalanche Advisory for Tuesday, January 24, 2017

Date: January 24, 2017
The current avalanche problem is the developing Wind Slab. New snow, wind, and a good bed surface are key ingredients for this problem and all exist this morning. Strong east winds are cross-loading many slopes, particularly the start zones of Pinnacle through Escape Hatch in Huntington and Left Gully and Hillman’s Highway in Tuckerman. Be aware that in our terrain, lower angled slopes often have several start zones above. Depending on what the weather does today, we may see these wind slabs become saturated with rain, turning into Wet Slab. With such a degree of uncertainty in the weather forecast today, it is imperative to keep an eye on the ground and to the sky, continually evaluating the snowpack.

Avalanche Advisory for Monday, January 23, 2016

Date: January 23, 2017
Water in the snowpack appears to be refrozen at most elevations and aspects on the mountain. As a result of this refreeze, the probability of Loose-Wet and Wet Slab avalanches will continue to decrease. One factor that is hard to pin down is the cloud cover forecast. On sunny aspects, the refreeze may slow or even reverse; be vigilant about snowpack evaluation as you venture onto steeper sunny slopes later today.

Avalanche Advisory for Sunday, January 22, 2017

Date: January 22, 2017
Due to the slow refreeze occurring on the mountain right now there is unlikely to be much of a loose-wet or wet slab avalanche problem remaining. There is a warm band of air remaining at around 5,000’ feet so look for warm and potentially unstable snow in any area that has not refrozen yet. A potentially greater problem today will be the difficult travel conditions due to post-holing through the breakable crust combined with the potential for a long fall on a hard snow surface.

Avalanche Advisory for Saturday, January 21, 2017

Date: January 21, 2017
With another warm day ahead of us, Wet Slab and Loose-Wet avalanches will be on our radar. Warm air temperatures and sunshine may test our snowpack today. There are two areas of new snow that present the most concern. The first of these is the areas of wind loading that occurred on Wednesday night and Thursday. These wind slabs formed on WNW winds and are largely in lee areas of our steepest terrain. The second layer of new snow presenting a concern is the areas of sluff deposit. Again, primarily under the steepest terrain, these two layers of new snow may see a strong period of warmth today that could test their bond with the old surface or soft snow interfaces underneath.

Avalanche Advisory for Friday, January 20, 2017

Date: January 20, 2017
Wet slabs and loose-wet avalanches will compete for your attention as today. Rising temperatures through the night coupled with sunshine, light winds and warm air temperatures will reduce the strength of our snowpack through the day. Areas of greatest concern are the fan shaped deposits of sluff debris that exist beneath steep terrain in the most easterly facing aspects and beneath steep pitches. These areas as well as large expanses of yesterday’s wind slabs will be capable of producing the largest avalanches.

Avalanche Advisory for January 19, 2017

Date: January 19, 2017
This advisory expires at Midnight. Huntington Ravine has CONSIDERABLE and MODERATE avalanche danger. Yale, Central, Pinnacle, and Odell have Considerable avalanche danger. Natural avalanches are possible and human-triggered avalanches are likely. North, Damnation, South and Escape Hatch have Moderate avalanche danger. Natural avalanches are unlikely and human-triggered avalanches are possible.  Tuckerman Ravine has CONSIDERABLE and […]

Avalache Advisory for Tuesday, January 17, 2017

Date: January 17, 2017
  This advisory expires at midnight. Tuckerman and Huntington Ravine have LOW avalanche danger. All forecast areas have Low avalanche danger. Natural and human-triggered avalanches are unlikely. In Tuckerman Ravine, Lower Snowfields and Little Headwall are not rated due to thin snow cover. AVALANCHE PROBLEM: The current avalanche problem is Wind Slab that formed Sunday. […]

Avalanche Advisory for Monday, January 16, 2016

Date: January 16, 2017
Tuckerman and Huntington Ravine have LOW avalanche danger. All forecast areas have Low avalanche danger. Natural and human-triggered avalanches are unlikely. In Tuckerman Ravine, Lower Snowfields and Little Headwall are not rated due to thin snow cover. AVALANCHE PROBLEM: Recent rain and a solid refreeze has reduced our avalanche problem to the scattered wind slabs […]

Avalanche Advisory for Sunday, January 15, 2017

Date: January 15, 2017
Thin Wind Slab will form today in isolated pockets. While likely small in size, scattered, and easy to identify when compared to the old surface, they could be enough to knock someone off their feet, leading to the big hazard today: long, sliding falls... A busy holiday weekend will lead to many people on the mountain today. Be prepared for routes to be crowded and to have to decide whether to wait in line or choose a different goal for the day.

Avalanche Advisory for Saturday, January 14, 2017

Date: January 14, 2017
This advisory expires at Midnight. Tuckerman and Huntington Ravine have LOW avalanche danger. All forecast areas have Low avalanche danger. Natural and human-triggered avalanches are unlikely. In Tuckerman Ravine, Lower Snowfields and Little Headwall are not rated due to thin snow cover. AVALANCHE PROBLEM: Recent rainfall has penetrated into our snowpack and created hard surface […]

Avalanche Advisory for Friday, January 13, 2017

Date: January 13, 2017
This advisory expires at Midnight. Tuckerman Ravine has MODERATE and LOW avalanche danger. Sluice, Lip, Center Bowl and Chute have Moderate avalanche danger. Natural avalanches are unlikely and human-triggered avalanches are possible. All other forecast areas have Low avalanche danger. Lower Snowfields and Little Headwall are not rated due to thin snow cover.  Huntington Ravines […]

Avalanche Advisory for Thursday, January 12, 2016

Date: January 12, 2017
This advisory expires at Midnight. Huntington and Tuckerman Ravines have CONSIDERABLE avalanche danger. All forecast areas will have Considerable avalanche danger today. Natural avalanches are possible and human-triggered avalanches are likely. Dangerous avalanche conditions exist. Careful snowpack evaluation, cautious route-finding and conservative decision making are essential.  Lower Snowfields and Little Headwall are not rated due to […]

Avalanche Advisory for Wednesday, January 11, 2017

Date: January 11, 2017
New snow last night with strong, shifting winds today will create large wind slab in all areas. These new slabs will see increasing loads throughout the day and with well-developed avalanche paths, they have the potential to run far. The terrain above Connection Cache in Tuckerman and the Fan in Huntington is avalanche terrain – don’t be lulled into a false sense of security. While there are areas that could be traveled in, with careful snowpack evaluation and cautious route-finding, good conservative decision making may lead to not traveling in avalanche terrain today.