Advisory – Past Fifteen Days

General Bulletin for Tuckerman Ravine

This is the final bulletin issued by the Mount Washington Avalanche Center for the 2016-17 season. This will remain in effect until complete melt out. Travel in the backcountry requires careful snow evaluation and mountain sense. Hazards due to snow and ice will persist until it is all gone. Snowstorms on Mount Washington in June may be uncommon, but are not unheard of. If venturing into the mountains, be sure to use all available resources to help plan your trip and make safe travel decisions.

General Bulletin for Saturday, May 27, 2017

A General Bulletin is in effect for Tuckerman Ravine. You will need to do your own snow stability assessments. A new advisory will be issued when conditions warrant or within 72 hours. We are no longer monitoring conditions in Huntington Ravine.

As high pressure builds over New England on Saturday, skies should clear as the day progresses. An inversion may keep clouds over mid-elevations with a slight chance of precipitation, but this should be limited to the morning. Sunday will see clearer skies overall with temperatures reaching close to the 50sF. A system arriving Sunday night will likely bring rain on Memorial Day.

General Bulletin for Wednesday, May 24, 2017

This bulletin will expire at Midnight on Friday, May 26, 2017. A General Bulletin is in effect for Tuckerman Ravine. You will need to do your own snow stability assessments. A new advisory will be issued when conditions warrant or within 72 hours. We are no longer monitoring conditions in Huntington Ravine. The high pressure […]

General Bulletin for Monday, May 22, 2017

The summer Lion Head Trail is now open and is the preferred route to the Summit from Pinkham Notch. A section of the Tuckerman Ravine Trail in the Bowl is closed to all use. This section is from Lunch Rocks to the junction of the Alpine Garden Trail and is due to the severe consequences of a fall in this area. Only this section is closed. Hiking or skiing in the vicinity of the closed trail, including the Lip, is not permitted. ATTENTION AUX RANDONNEURS! Une section du sentier du Tuckerman Ravine est présentement fermé à toutes les activités. Cette section est située entre Lunch Rocks et le sommet du Headwall jusqu’où ce dernier rejoint le sentier du Alpine Garden. Cette fermeture inclut également toute activité de descente dans le secteur du Lip. Seulement cette section du sentier est fermé. Cette fermeture annuelle est due à l’ampleur des crevasses et à la gravité qu’occasionnerait une chute dans ce secteur.

General Bulletin for Saturday, May 20, 2017

Cooler conditions have returned to the Ravines and brought a refreeze to the snowpack. Warming temperatures and sunshine today and through this weekend will soften snow and bring good, albeit limited skiing conditions to Tuckerman Ravine. Top to bottom runs are limited mostly to Hillman’s Highway and Left Gully.

The summer Lion Head Trail is now open and the preferred route to the summit from the east side. A section of the Tuckerman Ravine Trail is closed to all use. This is due to the severe consequences of a fall in this area. The closed section extends from the top of Lunch Rocks to the junction of the Alpine Garden Trail above the ravine. Only this section is closed. Hiking or skiing in the vicinity of the closed trail is not permitted. (ATTENTION AUX RANDONNEURS! Une section du sentier du Tuckerman Ravine est présentement fermé à toutes les activités. Cette section est située entre Lunch Rocks et le sommet du Headwall jusqu’où ce dernier rejoint le sentier du Alpine Garden. Cette fermeture inclut également toute activité de descente dans le secteur du Lip. Seulement cette section du sentier est fermé. Cette fermeture annuelle est due à l’ampleur des crevasses et à la gravité qu’occasionnerait une chute dans ce secteur.)

Please be aware that that snow and ice are still a concern on the summer Lion Head Trail and significant long-sliding falls have happened on the snowfield traverse near treeline. An ice axe and crampons and the ability to use them effectively are recommended.

General Bulletin for Thursday, May 18, 2017

On Mother’s Day through the following morning, the summit received 33” (83cm) of new snow. Hermit Lake received just 10” (25cm, 25% density) during the same period of time. Warming temperatures and rain on Monday led to rapid settlement with two reports the following day of medium sized but harmless, human-triggered loose, wet avalanches in the sloppy snow. Currently, the new snow is virtually indistinguishable from the old surface. The melting will continue today with capricious spring weather. Expect record breaking high temperatures today near 60F on the summit with winds gusting to 85mph and thunderstorms developing Thursday night. Temperatures will fall through Friday, possibly bringing a freeze to the snowpack on Friday night which would set the stage for improved skiing conditions on Saturday. Both weekend days are forecast to be sunny and in the 40’s F.

The summer Lion Head Trail is now open. Due to open glide cracks and undermined snow, the Tuckerman Ravine Trail is closed in the Ravine between Lunch Rocks and the Alpine Garden Trail. Please use the summer Lion Head trail if going to the summit from Pinkham. Please be aware that that snow and ice are still a concern on this trail and significant long-sliding falls have happened on the snowfield traverse near treeline.

General Bulletin for Monday, May 15, 2017

On Sunday, 12” of new snow fell at Hermit Lake, with 4-6” more falling today. New snow, increasing winds and warming temperatures will create the potential for natural avalanches in many areas in Tuckerman Ravine. This includes the summer Lion Head Trail between Hermit Lake and treeline. The Lion Head Winter route is once again the safer route to the summit. Though significant melting has occurred since winter, there are ample bed surfaces remaining on the east side of Mount Washington that will allow avalanches large enough to bury and kill a person to occur. Today, wind from the North around 60 mph will load slopes with a south facing aspect and cross-load easterly aspects with wind slabs. As temperatures warm today and into Tuesday, precipitation will transition to freezing rain and then rain which will stress these wind slabs, making them more sensitive to human triggering and increasing the chance of natural wet slab avalanches.

General Bulletin for Saturday, May 13, 2017

The Lion Head Winter route is now closed. The summer Lion Head Trail is now the preferred route to the summit of Mount Washington from the east side. This trail crosses steep snow slopes above significant cliffs in spots. As always in wintry ground conditions, crampons and ice axes and appropriate footwear are recommended equipment. Warm temperatures in the low 40’s with light southeast wind on the summit will make Saturday the better day of the weekend for skiing and hiking with plenty of snow remaining in Left Gully and Hillman’s Highway. Saturday afternoon will bring thickening clouds as the next precipitation moves in overnight bringing with it rain and slushy snowfall at higher elevations on Sunday. Sunday will be a washout with up to an inch and a half of rain predicted to fall by Monday.

General Bulletin for Wednesday, May 10, 2017

Temperatures will trend slightly higher each day through Friday, with cloud cover and precipitation potential decreasing as well. Today will remain just below freezing on the upper mountain. Light snowfall over the past two days has not been sufficient to form unstable slabs of much significance in our terrain. Minimal snow accumulation forecast for the next three days limits our avalanche concerns, but the current cold weather should motivate you to consider the possibility of such winter hazards, in addition to those present in springtime.

General Bulletin for Monday, May 8, 2017

An upper level low pressure system is moving over New England. This is slow moving and will promote cool and wet conditions for the duration of this bulletin. Temperatures should remain below freezing on the Summit with wind shifting between the N and W and speeds staying below 30mph. The snowpack will become firm with new snow covering some hazards. Forecast snow totals vary, but it seems likely that by the end of Wednesday it will be close to 3” of new snow.

General Bulletin for Saturday, May 6, 2017

Unless updated this bulletin expires at Midnight, Monday, May 8, 2017. A General Bulletin is in effect for Tuckerman Ravine. You will need to do your own snow stability assessments. A new advisory will be issued when conditions warrant or within 72 hours. A general bulletin for Tuckerman will be in effect until complete melt […]

General Bulletin for Wednesday, May 03, 2017

Unless updated this bulletin expires at Midnight, Friday, May 5, 2017. A General Bulletin is in effect for Tuckerman Ravine. You will need to do your own snow stability assessments. A new advisory will be issued when conditions warrant or within 72 hours. A general bulletin for Tuckerman will be in effect until complete melt […]

General Bulletin for Monday, May 1, 2017

A General Bulletin is in effect for Tuckerman Ravine. You will need to do your own snow stability assessments. A new bulletin will be issued within 72 hours or when conditions warrant. We are no longer monitoring conditions in Huntington Ravine.

Due to open glide cracks and undermined snow, the Tuckerman Ravine Trail is now closed in the Ravine between Lunch Rocks and its junction with the Alpine Garden Trail. This closure includes the Lip, which presents numerous hazards to the public and potential rescuers alike. This area is closed to all use.

General Bulletin for Saturday, April 29, 2017

Unless updated this bulletin expires at Midnight, Monday, May 1. A General Bulletin is in effect for Tuckerman Ravine. You will need to do your own snow stability assessments. A new bulletin will be issued when conditions warrant or within 72 hours. A general bulletin for Tuckerman will be in effect until complete melt out […]

General Bulletin for Wednesday, April 26, 2017

Temperatures have only dipped below freezing briefly since last Saturday’s solid overnight freeze. Warm temperatures penetrating the snowpack increase the risk of loose, wet sluffs large enough to push a skier downhill and possibly into a crevasse, a waterfall hole, into rocks or over a cliff. Continued warm temperatures are on tap until the weekend when summit temperatures may once again drop, allowing a refreeze. Until then, count on record setting warm temperatures along with meltwater runoff to make the following hazards worse: