Bridger Teton Avalanche Center
WESTERN WYOMING AVALANCHE ADIVSORY
Issued on Sun March 09, 2014 6:46 PM
Today we experienced partly cloudy skies in the morning. Clouds thickened and winds increased in the afternoon. Temperatures rose from the 20s into the upper 20s to mid 30s at the higher elevations, into the upper 30s to low 40s at the mid elevations and to near 50 degrees at the lowest elevations.
The warm afternoon temperatures continue to settle and consolidate a snowpack that received 23 inches of moisture from the end of January until two days ago. At about 2 PM the first skier in the Double Dog Leg Couloir in Granite Canyon was violently swept downhill by a shallow slab avalanche. The skier deployed an airbag and sustained signigicant injuries but was not buried. This accident involved an aggressive terrain choice for the conditions. Yesterday a similar incident nearly ended in a fatality. Current conditions warrant respect and conservative terrain choices.
FORECAST FOR Monday, March 10, 2014
Snowfall will develop overnight with a mix of snow and rain below an elevation of 7,500 feet and continue through the day before changing over to all snow on Monday evening. At the higher elevations accumulations of several inches are expected overnight with up to seven more inches possible during the day. Strong west to southwest winds with average speeds of 35 and gusts to 50 miles per hour will accompany this snowfall and create areas of blowing and drifting snow. Temperatures will be in the 20s and 30s in the mountains and in the 30s in the valley.
In the mountains strong west winds will drift new snow onto leeward aspects and create new soft slabs that will increase in depth, volume and sensitivity to human triggers as the day progresses. At the lower elevations warm temperatures and rain will create unstable conditions on steep snow covered slopes. The new snow will increase the load on deep persistent hard slabs. The potential for humans to trigger a dangerous hard slab in areas with poor snowpack structure will be on the increase while this loading occurs. The general avalanche hazard is expected to be CONSIDERABLE.
TREND FOR Tuesday, March 11, 2014 AND Wednesday, March 12, 2014
Colder and dryer conditions will prevail after this storm system departs to the east on Tuesday. The general avalanche hazard is expected to slowly decrease.
For further information call 307-733-2664
To report an avalanche observation call 307-739-2607
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