General Bulletin issued on Wednesday, May 8, 2019

This information was published 05/08/2019 at 9:00 AM.
A new bulletin will be issued when conditions warrant.


The Bottom Line

High pressure will clear the skies today, with moderate wind and unseasonably cool temperatures reaching only the upper 20sF on the summit before dropping to the upper teens F tonight.  The sun should soften surface snow on sunny aspects, however an ice ax and crampons may be necessary to travel safely on steep terrain, especially higher up in the gullies. Also, keep your eye on the sun and the time as falling afternoon temperatures can quickly re-freeze the snowpack creating hazardous sliding fall conditions.

Thursday is forecast to be mostly sunny and warmer, with high temperatures in the mid 30sF on the summit.  After tonight’s freeze, snow on most or all aspects should soften nicely making for good spring skiing tomorrow. Rain is expected on Friday, and clearing for the weekend. Rain will speed the undermining process and open moats and crevasses in the Lip and Headwall. A descent of the Lip will carry greater and greater consequence as the snow continues to collapse and creep downhill.

2019-5-8 General Bulletin

Danger Rating

Among the many spring hazards (see Snowpack and Avalanche Discussion below), are the emerging large rocks as the snowpack recedes in the run-outs of some ski runs. Sliding falls are always dangerous, and these rocks increase the consequence of even a short fall as one skier experienced this past Saturday while skiing Right Gully. Think ahead and ask yourself: if I fall, can I stop? If I don’t stop will I hit anything?

Rocks under Right Gully and Lobster Claw. Photo 5/1/2019

Mountain Weather

The summit recorded .54” of water on Tuesday, none of which was snow.  Temperatures dropped overnight with the summit at 19F this morning reaching into the upper 20sF for a high. Skies will clear Wednesday and remain so overnight and into Thursday when clouds return in the afternoon. Thursday is forecast to be the warmer of the two days with summit temperatures in the mid 30sF. NW wind at 25-40 mph will shift south and decrease to 10-25 mph on Thursday.

Looking ahead, mixed precipitation is expected to begin falling Thursday evening before transitioning to rain with more than 1.5” through the day Friday, possibly lingering into Saturday morning.

Forecast Discussion

Prolonged periods of melt have opened deep cracks and holes in our snowpack, as flowing water undermined snow and opened some stream channels. Areas of very icy snow have kept skiers on their toes, though the return of warming conditions should restore some degree of edgeability to the surface snow. Minor sluffing becomes likely during warm conditions and the resulting sluff channels may complicate descents. Keep the following hazards in mind as you make terrain decisions in our dynamic spring backcountry conditions:

Steep snow and ice in gullies and trails, such as the Lion Head Winter Route, become very hard during any frozen periods in our spring melt/freeze cycles. This weekend, you’ll find plenty of exposed ice mixed in with softer, rotten snow. Currently, the Lion Head Winter Route as well as areas of the snowpack that have been scoured by wind are icy and require crampons and an ice axe to climb with security. The tops of many ski descents also fit this description.

Additional Information

Due to heavy snow and wind loading this winter, the Winter Lion Head Route remains the preferred, easier route to the summit from the east side. It is steep and icy sections make crampons and ice axes necessary.

The Sherburne and Gulf of Slides ski trails are no longer completely snow covered to Pinkham Notch. Expect ice, open stream crossings, rocks and bare patches.

The Sherburne is closed at the #7 crossover .7 miles downhill of Hermit Lake (see red path in image below). A rope directs skiers to the Tuckerman Ravine Trail to prevent damage that results from walking on the muddy Sherburne trail. Please remove your skis and walk down the Tuckerman Ravine Trail to avoid collision with the many hikers on the trail.

Details on daily snowfall totals, precipitation type, total depth of snow and other information can be found on our page devoted to snow study plot data. Click here to check it out.

Recent snowpack and avalanche observations can be found here and on Instagram. Your observations help improve our forecast product. Please take a moment and submit a photo or two and a brief description of snow and avalanche information that you gather in the field.

The young man who was last seen heading up the Winter Lion Head Route on March 8 remains missing.  It is thought that he may have been intent on taking his own life. If that is the case, his remains may be somewhere with the Cutler River Drainage,  around the summit or within a few hours hike on the steep part of Lion Head Winter Route. Please report any potential clues to the NH Fish and Game officers at 603-271-3361 or to USFS Snow Rangers at mwactucks@gmail.com or via AMC Front Desk staff at Pinkham Notch Visitor Center. If it is clear that you have found him, please call 911.

Snow Plot Information

DateHN24HN24W
(SWE)
Density (%)HSTTotalAir TT MaxT MinSkyPrecipComments
01/17/20
05:11
22 CM 16.6 MM 9%26CM107 CM-20.0 C-4.0 C-22.0 CFewNo precipitation
01/16/20
05:15
3 CM 2.9 MM 11%NC85 CM-7.0 C-4.0 C-7.0 COvercastSnow
01/15/20
05:16
2 CM MM 16%NC82 CM-4.0 C-3.5 C-7.0 COvercastSnowView
01/14/20
05:13
Trace 1.0 MMTrace79 CM-7.0 C-2.0 C-9.0 COvercastNo precipitation
01/13/20
05:15
Trace 23.6 MMTrace79 CM-9.0 C7.0 C-12.5 CFewNo precipitation

Avalanche Log and Summit Weather

Thank you Mount Washington Observatory for providing daily weather data from the summit of Mount Washington.

DateMax TempMin TempTotal (SWE)24H Snow & IceWind AvgWind Fastest MileFastest Mile DirAvalanche Activity
01/16/2018 F-11 F .048 in 6.1 in43.3 MPH117 MPH

330 (NNW)

01/15/2020 F11 F 0.25 in 1.8 in9.3 MPH74 MPH

290 (WNW)

01/14/2020 F10 F 0.03 in 0.7 in32 MPH69 MPH

280 (W)

01/13/2022 F14 F .04 in .8 in49.5 MPH81 MPH

240 (WSW)

01/12/2045 F8 F .84 in .4 in58.4 MPH104 MPH

260 (W)

01/11/2042 F29 F .32 in 0 in68.8 MPH119 MPH

230 (SW)

01/10/2030 F12 F .22 in 1.3 in63.4 MPH102 MPH

260 (W)

01/09/2015 F-14 F .04 in .4 in50.1 MPH114 MPH

310 (NW)

View
View
01/08/2013 F-8 F .52 in 5.2 in43.5 MPH95 MPH

290 (WNW)

01/07/2016 F1 F .17 in 1.6 in41.8 MPH90 MPH

280 (W)

01/06/2010 F3 F .2 in 2.2 in32.8 MPH71 MPH

270 (W)

01/05/2018 F-1 F .31 in 2.2 in54.6 MPH85 MPH

270 (W)

Please Remember:

Safe travel in avalanche terrain requires training and experience. This forecast is just one tool to help you make your own decisions in avalanche terrain. You control your own risk by choosing where, when, and how you travel.

Avalanche danger may change when actual weather differs from the higher summits forecast.

For more information contact the US Forest Service Snow Rangers, AMC visitor services staff at the Pinkham Notch Visitor Center, or the caretakers at Hermit Lake Shelters or seasonally at the Harvard Cabin (generally December 1 through March 31). The Mount Washington Ski Patrol is also available on spring weekends.

Posted 05/08/2019 at 9:00 AM.

Jeff Fongemie, Snow Ranger
USDA Forest Service
White Mountain National Forest