Bridger Teton Avalanche Center
WESTERN WYOMING AVALANCHE ADIVSORY
Issued on Sun December 08, 2013 6:10 PM
Skies were partly to mostly cloudy today as temperatures in the mountains rose from the double digits below zero into the single digits below zero before a surge of colder air moved into the region from the northwest during the afternoon hours. By late afternoon temperatures were back in the double digits below zero. A trace to two inches of new snow accumulated during the past 24 hours. Winds were northwesterly at 10 to 20 miles per hour.
Some isolated areas of fresh wind drifted snow exist in exposed areas at the higher elevations. Snow surfaces on aspects that are not wind affected are comprised of loose dry powder snow. The snowpack at 9,000 feet generally ranges from three to five in depth. In most areas less than two feet of snow exist below an elevation of 7,500 feet.
FORECAST FOR Monday, December 09, 2013
A cold northwest flow with limited moisture will bring areas of light snow to the mountains during the next 24 hours. Accumulations of a trace to a couple inches are possible. On Monday skies will be mostly cloudy with a chance for some light snowfall. Temperatures will remain below zero. Winds will back towards the west at 10 to 20 miles per hour.
The general avalanche hazard is expected to be MODERATE at the mid and upper elevations (7,500 to 10,500 feet) and be LOW below an elevation of 7,500 feet. Human triggered slab avalanches are possible in exposed avalanche terrain where wind loading occurred during the last storm. These slabs could be up to three feet in depth and could step down to the ground on steep northerly aspects above an elevation of 9,000 feet. Larger triggers such as snowmobiles are more likely to trigger one of these dangerous slabs and previous tracks should not be interpreted as a sign of stability.
TREND FOR Tuesday, December 10, 2013 AND Wednesday, December 11, 2013
Temperatures will gradually warm in a westerly flow. The general avalanche hazard is not expected to significantly change.
For further information call 307-733-2664
To report an avalanche observation call 307-739-2607
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