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Turnagain Area Avalanche Advisory
Friday, January 1st 2010 7:42 am by CNFAIC Staff
ARCHIVED ADVISORY - All advisories expire after 24 hours from the posting date/time.
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BROUGHT TO YOU BY
The Bottom Line
Happy New Year backcountry travelers this is Carl Skustad with the Chugach National Forest Avalanche Information Center on Friday, January 1st at 7 am. This will serve as a general backcountry avalanche advisory issued for Turnagain Arm with Turnagain Pass as the core advisory area (this advisory does not apply to highways, railroads, or operating ski areas).

ANNOUNCEMENTS
All areas designated for snowmachines on the Chugach National Forest are open to snowmachines except Placer and 20 Mile. Please remember that Center and Divide Creeks near the Johnson Pass North Trailhead are always closed due to the current Forest Plan.

WEATHER ROUNDUP

3800 -Sunburst Wx Station-
19 deg F, winds are averaging 9 with gusts to 11 out of the N

3400 Fresno Ridge Wx Station-
20 deg F, winds are averaging 3 with gusts to 7 out of the SW

2400-Seattle Ridge Wx Station-
winds are averaging 3 with gusts to 7 out of the SE

1800-Center Ridge Wx Station-
Precip: 0.0 inches of water
Total depth of 59 inches after 1" of settlement
18 deg F

Forecast

WESTERN PRINCE WILLIAM SOUND-
INCLUDING...WHITTIER...SEWARD...GIRDWOOD...MOOSE PASS
500 AM AKST FRI JAN 1 2010

...STRONG WIND THROUGH THIS EVENING NEAR WHITTIER...

.TODAY...SUNNY. HIGHS IN THE TEENS TO LOWER 30S...COLDEST INLAND.
VARIABLE WIND 10 MPH EXCEPT NORTH WIND 15 TO 30 MPH NEAR SEWARD. WEST
WIND 30 TO 45 MPH NEAR WHITTIER.
.TONIGHT...MOSTLY CLEAR. LOWS 5 TO 25 ABOVE...COLDEST INLAND.
VARIABLE WIND TO 10 MPH EXCEPT NORTH WIND 15 TO 25 MPH NEAR SEWARD.
WEST WIND 30 TO 45 MPH DIMINISHING TO 15 TO 30 MPH AFTER MIDNIGHT
NEAR WHITTIER.
.SATURDAY...MOSTLY SUNNY IN THE MORNING THEN BECOMING MOSTLY
CLOUDY. HIGHS IN THE MID TEENS TO LOWER 30S...COLDEST INLAND. LIGHT
WINDS EXCEPT NORTH AND WEST WIND 15 TO 25 MPH NEAR SEWARD AND
WHITTIER.
.SATURDAY NIGHT...MOSTLY CLOUDY WITH A CHANCE OF SNOW. LOWS ZERO
TO 15 ABOVE...COLDEST INLAND. LIGHT WINDS EXCEPT NORTH 10 TO
20 MPH NEAR SEWARD.
.SUNDAY...CLOUDY WITH A SLIGHT CHANCE OF SNOW. HIGHS IN THE LOWER
TO MID 20S. VARIABLE WIND 10 MPH EXCEPT NORTH 15 TO 20 MPH NEAR
SEWARD.
.SUNDAY NIGHT...SNOW LIKELY. LOWS IN THE TEENS.
.MONDAY THROUGH TUESDAY NIGHT...MOSTLY CLOUDY WITH A CHANCE OF

TEMPERATURE / PRECIPITATION

SEWARD 32 17 29 / 0 0 0
GIRDWOOD 19 8 15 / 0 0 0


AVALANCHE DISCUSSION

Due to a lack of significant weak layers and a mild weather forecast, the avalanche danger for Turnagain Pass will remain at LOW today. LOW is defined as: Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features. Natural and human-triggered avalanches unlikely. Small avalanches in isolated areas or extreme terrain. Terrain features to be mindful of include steep rollovers (>38 %) near ridgetops and hanging snowfields that look wind loaded.

On New Years Eve we found two layers of interest at 8 and 10 inches below the snows surface. Both of these layers failed easily in stability tests (CT 6 and CT 11 Q2). These layers looked to be mid storm interfaces and should heal over time. The surface snow ranged from surface hoar to surface faceting. Death crust below 2000 ft and fairly good snow above.

AnCNFAIC Staff concern today will be the glide cracks. A couple of large glide cracks have opened north of the snowmachine up track to Seattle ridge. Odds are there are numerous more of these crevasse like features which may be difficult to see. People and dogs have fallen into these cracks before, and they can be very difficult to get out of. Sometimes these glide cracks will avalanche, but this does not appear to be a concern today. Its always a good idea to treat glide cracks like cornices and avoid traveling underneath their path. Like cornices, glide cracks are very difficult to predict.

Always remember that safe backcountry travel requires training and experience. You control your own risk by choosing where, when, and how you travel.

Thanks for checking todays avalanche advisory. Happy New Year.


 Show the Complete North American Avalanche Danger Scale
1 Low Alpine / Above 2,500' Travel Advice: Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
1 Low Treeline / 1,000'-2,500' Travel Advice: Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
1 Low Below Treeline / Below 1,000' Travel Advice: Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

This is a general backcountry avalanche advisory issued for Turnagain Arm with Turnagain Pass as the core advisory area (this advisory does not apply to highways, railroads, or operating ski areas).

Winter snowmachine use open/closed status and riding conditions updates

Riding status is not associated with avalanche danger. An area will be open to motorized use in accordance to the Forest Management Plan when snow coverage is adequate to protect underlying vegetation. Backcountry hazards including avalanche hazard are always present regardless of the open status of motorized use areas.

(Updated: Mar 20, 2019 )

AREA STATUS WEATHER AND RIDING CONDITIONS
Glacier District
Johnson Pass: Open
Placer River: ClosedClosed as of 3.20.19 due to lack of snow.
Skookum Drainage: ClosedPlacer access closed as of 3.20.19 due to lack of snow.
Turnagain Pass: Open
Twentymile: ClosedClosed as of 3.20.19 due to lack of snow.
Seward District
Carter Lake: Open
Lost Lake Trail: OpenPlease stay on trail to avoid resource damage through forested areas.
Primrose Trail: OpenPlease stay on trail to avoid resource damage through forested areas.
Resurrection Pass Trail: ClosedClosed for the 2018/19 season. Next season will be open to motorized use.
Snug Harbor: Open
South Fork Snow River Corridor: ClosedClosed as of 3.20.19 due to lack of snow.
Summit Lake: Open

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The information in this advisory is from the U.S. Forest Service, which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur. This advisory provided by the Chugach National Forest, in partnership with Friends of the Chugach National Forest Avalanche Information Center.


USFS SNOW AND AVALANCHE HOTLINE (907) 754-2369
If you have comments or questions regarding CNFAIC operations or winter recreation management, please email staff@chugachavalanche.org
© 2019 Chugach National Forest Avalanche Information Center. All rights reserved.
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