Observation: Whitney Basin

Observation Date:

02/9/2017

Observer Name:

Ted Scroggin

Region:

Uintas

Location Name or Route:

Whitney Basin

Weather

Sky:

Broken

Wind Direction:

Southwest

Wind Speed:

Moderate

Weather Comments:

Warm start to the day and no overnight freeze. Our groomer mentioned he had rain up to 9,000' around midnight early this morning. Today was a mix of grey skies, sunshine and moderate to strong southwest winds.

Snow Characteristics

Snow Surface Conditions:

Wind Crust

Damp

Snow Characteristics Comments:

A wide variety of conditions with very dense snow on the north facing slopes, wind hammered snow along the exposed ridge lines and quite damp snow where the sun was.

Red Flags

Red Flags:

Wind Loading

Rapid Warming

Red Flags Comments:

The snowpack was quite dense and as Craig mentioned; "shrink wrapped", but the gusty winds still found snow to blow around. A big warm up for the snow and lots of roller balls and damp snow this afternoon.

Avalanche Problem #1

Type:

Wind Slab

Trend:

Same

Problem #1 Comments:

I did not observe any fresh wind slabs, but the strong winds at times was drifting snow onto the leeward slopes.

Avalanche Problem #2

Type:

Cornice

Trend:

Same

Problem #2 Comments:

There were numerous slopes where large chunks of cornice had broken off and tumbled quite far down the slope and some of these triggered some shallow slides.

Comments:

Without a good overnight freeze, the roof of our cat shed continued to produce some large slabs of snow sliding off the roof.

1. Some of the cornice blocks are quite large and you would not want to be in the path as these are tumbling down the slope. 2. On this steep northeast facing slope a large chunk of cornice broke naturally and triggered a small slide, but the debris piled up quickly where the slope transitioned onto more gentle terrain. Not a good to place to hang out below these big cornices. 3. Here on Double Hill another fresh chunk of snow broke naturally off the ridge line.

The winds have been blowing steady for a couple of days and today they continued to find enough snow to drift onto leeward slopes and at times the winds were swirling upslope.

Today's Observed Danger Rating:

Moderate

Tomorrows Estimated Danger Rating:

Considerable

Snow Profile Coordinates:

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Observation: Whitney Basin

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