Sat, February 07, 2015 Turnagain Pass Avalanche Forecast

Sat, February 7th, 2015

Alpine
Above 2,500'

Low (1)

Treeline
1,000'-2,500'

Low (1)

Below Treeline
Below 1,000'

No Rating (0)

Alpine Above 2,500'		Low (1)
Treeline 1,000'-2,500'		Low (1)
Below Treeline Below 1,000'		No Rating (0)

Danger Scale:

No Rating (0)

Low (1)

Moderate (2)

Considerable (3)

High (4)

Extreme (5)

Avalanche Problem 1

Normal Caution

Normal Caution

Normal Caution means triggering an avalanche is unlikely but not impossible.

More info at Avalanche.org

It has now been three weeks since the snowpack received any significant load. In those three weeks a total of 4” of snow fell in 1” increments. Temperatures have remained seasonable and winds have for the most part been calm.

What this all adds up to is a snowpack that is generally well adjusted. Triggering an avalanche is possible, but falls into the “outlier” category.

Low volume loose snow avalanches can be triggered on very steep (>40 degrees) sustained slopes. Watch your sluff and steer away from it, especially around terrain traps.

Isolated pockets of recently formed wind slab 6-8” in depth may be found in the higher elevations around the Girdwood Valley. If you make it into these areas, be on the lookout for stiff and hollow sounding snow on steep leeward slopes.

Glide cracks are scattered throughout the forecast area. Minimize time spent under glide cracks as they can release without the normal warning signs.

Aside from these snowpack issues you can expect to encounter firm and icy conditions on approaches (see photo below) with rocks and stumps being obstacles to avoid while exiting the mountains.

Icy Tincan approach

Weather

Sat, February 7th, 2015

A much anticipated wind event for Southcentral AK took place over the last 24 hours. Fortunately Turnagain Pass was spared in this outflow event. We found winds to be calm on ridgetops while in the field yesterday. Light plumes coming off of the higher peaks around the Girdwood, Twentymile, and Portage Valleys could be seen occasionally during the day.

Wind in mountainous terrain is not straightforward. Pictured here are plumes coming off a peak above Twentymile from North winds on Feb 6th. The wind anemometer at sea level shows winds out of the South. photo: Fitzgerald

Wind??

Temperatures were cold, with ridgetops averaging in single digits F.

Today will be a cold one, with temps to remain in the single digits F at ridgetops. Winds will be light out of the North at 5-10mph. We may see some high clouds streaming in from the East as a result of Low pressure spinning in the Gulf of Alaska.

The extended outlook is showing a welcome change in the overall pattern. High pressure that has dominated lately will break down and allow for moisture to make its way to the area. The next chance for accumulating snow will come by Tuesday or Wednesday of the coming week.

*Alyeska Mid station data 7am-2pm due to station malfunction.

PRECIPITATION 24-hour data (6am – 6am)

	Temp Avg (F)	Snow (in)	Water (in)	Snow Depth (in)
Center Ridge (1880′)	12	0	0	31
Summit Lake (1400′)	0	0	0	7
Alyeska Mid (1700′)	10	0	0	21*

RIDGETOP 24-hour data (6am – 6am)

	Temp Avg (F)	Wind Dir	Wind Avg (mph)	Wind Gust (mph)
Sunburst (3812′)	6	ENE	7	23
Seattle Ridge (2400′)	9	S	4	17

Observations

Recent Observations for Turnagain Pass

Date	Region	Location	Observer
05/28/22	Turnagain	Avalanche: Turnagain Pass – late May wet slab cycle	CNFAIC Staff
05/21/22	Turnagain	Avalanche: Magnum, Lipps and Tincan	CNFAIC Staff
05/17/22	Turnagain	Avalanche: Sunburst	CNFAIC Staff
05/17/22	Turnagain	Observation: Tincan Ridge	Joe Kurtak
05/11/22	Turnagain	Avalanche: Cornbiscuit and Magnum west faces	CNFAIC Staff Forecaster
05/07/22	Turnagain	Observation: Granddaddy	Kit Barton
04/29/22	Turnagain	Observation: Sunburst wx station	AS/ MM/ AM/ NH
04/28/22	Turnagain	Observation: More Turnagain Pass/Summit Lake wet slab activity	Alex Marienthal
04/27/22	Turnagain	Observation: Magnum	Sykes / Buttrick Forecaster
04/27/22	Turnagain	Observation: Girdwood/Summit/Turnagain Road obs	A S

Riding Areas

Updated Wed, June 01st, 2022

Status of riding areas across the Chugach NF is managed by the Glacier and Seward Ranger Districts, not avalanche center staff. Riding area information is posted as a public service to our users and updated based on snow depth and snow density to prevent resource damage at trailhead locations. Riding area questions contact: mailroom_r10_chugach@fs.fed.us

Area	Status	Weather & Riding Conditions
Glacier District
Johnson Pass	Closed	Closed as of May 1 per Forest Plan.
Placer River	Closed	Closed as of April 25th due to insufficient snow coverage.
Skookum Drainage	Closed	Closed as of April 1st per Forest Plan.
Turnagain Pass	Closed	Closed as of June 1st.
Twentymile	Closed	Closed as of April 6th due to insufficient snow coverage.
Seward District
Carter Lake	Closed	Closed as of May 1 per Forest Plan.
Lost Lake Trail	Closed	Closed as of May 1 per Forest Plan.
Primrose Trail	Closed	Closed as of May 1 per Forest Plan.
Resurrection Pass Trail	Closed	Closed as of May 1 per Forest Plan.
Snug Harbor	Closed	Closed as of May 1 per Forest Plan.
South Fork Snow River Corridor	Closed	Closed as of May 1 per Forest Plan.
Summit Lake	Closed	Closed as of May 1 per Forest Plan.