Share your feedback! Share your feedback!

How’s our new website?
How can we better serve you?

Turnagain Pass Avalanche Forecast RSS

Archives
ARCHIVED FORECAST - All forecasts expire after 24 hours from the posting date/time.
Issued
Fri, March 19th, 2010 - 7:00AM
Expires
Sat, March 20th, 2010 - 7:00AM
Forecaster
CNFAIC Staff
The Bottom Line

Good morning backcountry travelers this is Carl Skustad with the Chugach National Forest Avalanche Information Center on Friday March 19th, 2010 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).

WEATHER ROUNDUP

A significant shot of precip is moving through the advisory area this morning. The radar and satellite show more moving our way. The snowline dropped to near sealevel last night. Look for that to lift up again today to approximately 600 ft. Winds have been moderate to strong with ridgetop averages in the teens to twenties. Ridgetop gusts have been 30 – 50 mph. All winds have been east to southeast. Snowfall totals range from 0 at sealevel to 16 inches at Grandview. Alyeska midway got 6-9″, Alyeska top got 15 plus, and Turnagain Pass (1800) got 15″. It’s hard to say how much fell at the highway elevation of 1000 ft in T-Pass. Less than 15 but probable 10-12″

AVALANCHE DISCUSSION

Today’s avalanche danger level is CONSIDERABLE with pockets of HIGH on south to southwest alpine slopes.

Considerable means natural avalanche are possible and human triggered avalanches are likely. Dangerous avalanche conditions. Careful snowpack evaluation, cautious routefinding and conservative decision making essential.

The pockets of HIGH avalanche danger will exist where suncrusts were formed over the last week. South to southwest slopes steeper that 35 degrees that have this crust will see this higher hazard.

We received over an inch of water and up to 16 inches of snow above 1000 ft in the last 24 hours. Winds have been significant. Add this to the many weak layers we had present and we see our avalanche danger jump up a notch. It looks like the weather will settle down this afternoon with less chance for rain and snow tonight.

Proof of the weak layers present lie in the multiple human triggered avalanches we saw over the last week. See a full detailed list by checking the 03-18-2010 advisory in the archive. In the spring we start to see many layers in our snowpack. Wind, sun, rain, snow, faceting, all form funky layers in the snow. These layers will be harder and harder to track. You will have to rely less on reports and advisories and more on your ability to interpret the snow in front of you. Spacial variability becomes common place in the spring. One slope may have great stability and 100 ft that way on a westerly aspect the stability may be death on a stick.

Take time to evaluate conditions this weekend. This little (not so little) storm of snow will increase our hazard all weekend. Time to dial it back for a couple days and see how this layer sets up. My biggest concern lies in those alpine south to southwest aspect where buried sun crusts exist.

Glide cracks are secondary concern today. These crevasse like features that are cracks that go all the way to the ground appeared to have opened up a bit more over the past 2-4 days. Glide cracks are like cornices in that they are wild cards that are very difficult to predict. Stay far away from these cracks today since they are actively moving right now.

WEATHER FORECAST (National Weather Service)

WESTERN PRINCE WILLIAM SOUND-

INCLUDING…WHITTIER…SEWARD…GIRDWOOD…MOOSE PASS

500 AM AKDT FRI MAR 19 2010

…STRONG WIND THIS MORNING THROUGH PORTAGE VALLEY AND ALONG

TURNAGAIN ARM…

.TODAY…SNOW AND RAIN. SNOW ACCUMULATION UP TO 6 INCHES AT HIGHER

ELEVATIONS…LITTLE ACCUMULATION ELSEWHERE. HIGHS AROUND 40. NORTH TO

EAST WIND 10 TO 20 MPH. GUSTS TO 30 MPH THIS MORNING. THROUGH PORTAGE

VALLEY AND TURNAGAIN ARM…EAST WIND 15 TO 30 MPH. GUSTS TO 45 MPH

THIS MORNING.

.TONIGHT…MOSTLY CLOUDY. A CHANCE OF SNOW AND RAIN IN THE

EVENING…THEN A CHANCE OF SNOW AFTER MIDNIGHT. LOWS IN THE MID

20S TO LOWER 30S. NORTH TO EAST WIND 15 MPH.

.SATURDAY…MOSTLY CLOUDY. A SLIGHT CHANCE OF SNOW SHOWERS IN THE

MORNING…THEN A CHANCE OF RAIN SHOWERS AND A SLIGHT CHANCE OF

SNOW SHOWERS IN THE AFTERNOON. HIGHS IN THE MID 30S TO LOWER 40S.

VARIABLE WIND 10 MPH.

.SATURDAY NIGHT…MOSTLY CLOUDY IN THE EVENING THEN BECOMING

PARTLY CLOUDY. A CHANCE OF SNOW SHOWERS. LOWS IN THE LOWER TO MID

20S. VARIABLE WIND TO 10 MPH.

.SUNDAY…PARTLY CLOUDY WITH A SLIGHT CHANCE OF SNOW SHOWERS.

HIGHS IN THE MID 30S TO LOWER 40S. LIGHT WINDS EXCEPT WEST 10 TO

20 MPH NEAR WHITTIER.

TEMPERATURE / PRECIPITATION

SEWARD 42 29 41 / 80 30 40

GIRDWOOD 42 25 41 / 80 30 0

WEATHER STATION SUMMARY for last 24 hours at TURNAGAIN PASS

3800′-Sunburst Wx Station

22 degrees F, average east winds in the 20’s with gust in the 30’s to 40’s.

2600′-Seattle Ridge Wx Station

26 degrees F, with average southeast winds in the single digits and gust into the teens.

1800′-Center Ridge Wx Station

29 degrees F, 1.3 inches of water equivalent and up to 15 inches of snow.

I will update this advisory tomorrow morning Saturday March 19, 2010 by 0700. Thanks and have a great day.

Thanks to our sponsors!
Fri, March 19th, 2010
Alpine
Above 2,500'
Considerable (3)
Avalanche risk
Treeline
1,000'-2,500'
Considerable (3)
Avalanche risk
Below Treeline
Below 1,000'
Considerable (3)
Avalanche risk
Alpine
Above 2,500'
Avalanche risk
Considerable (3)
Treeline
1,000'-2,500'
Avalanche risk
Considerable (3)
Below Treeline
Below 1,000'
Avalanche risk
Considerable (3)
Danger Scale:
No Rating (0)
Low (1)
Moderate (2)
Considerable (3)
High (4)
Extreme (5)
Observations
Recent Observations for Turnagain Pass
Date Region Location
05/06/20 Turnagain Avalanche: Pastoral Peak, north face
04/10/20 Turnagain Avalanche: Wolverine
04/10/20 Turnagain Observation: Eddies lookers right shoulder
04/09/20 Turnagain Observation: Bench Peak
04/04/20 Turnagain Observation: Tincan
04/04/20 Turnagain Observation: Pete’s North
03/26/20 Turnagain Avalanche: Tincan – Proper (SW facing)
03/26/20 Turnagain Avalanche: Seattle Ridge
03/25/20 Turnagain Avalanche: Sunburst Uptrack @ 2000′
03/24/20 Turnagain Observation: Turnagain – Road Observations
Riding Areas
Updated Fri, May 01st, 2020

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
Placer River
Closed
Skookum Drainage
Closed
Turnagain Pass
Closed
Closed as of May 1. Thanks for a fun, safe season!
Twentymile
Closed
Seward District
Carter Lake
Closed
Lost Lake Trail
Closed
Primrose Trail
Closed
Resurrection Pass Trail
Closed
Snug Harbor
Closed
South Fork Snow River Corridor
Closed
Summit Lake
Closed

Subscribe to Turnagain Pass
Avalanche Forecast by Email

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.