Bridger Teton Avalanche Center
WESTERN WYOMING AVALANCHE ADIVSORY
Issued on Wed November 26, 2014 5:11 PM
In the last four days the mountains have received over forty inches of snow and nearly five inches of moisture. Temperatures rose during this period particularly yesterday when temperatures increased fifteen degrees while 15-20 inches of snow fell containing three inches of water. At the lower elevations the storm ended with significant rain. In the mountains today, temperatures held in the upper twenties while summit winds were from the west with twenty to twenty five mile per hour averages. Skies were mostly cloudy with a few snow flurries falling in localized areas. The snowpack gained strength during these conditions today.
Visibility limited the reporting of storm cycle activity however significant slides with three and foot foot crowns were reported on Green River Traverse Slide just to the south of the Jackson Hole Mountain Resort and on Olive Oil in Grand Teton National Park. The first day of avalanche reduction efforts at the Jackson Hole Mountain Resort did not produce widespread avalanches but did result in several large avalanches. All of this activity can be viewed on the avalanche events area of our website. These slabs were all wind slabs that ran on recently formed and older snow layers. At lower elevations the snowpack remained supportive even though rain and warm temperatures both saturated and settled it.
FORECAST FOR Thursday, November 27, 2014
Thanksgiving day looks to be partly to mostly cloudy, dry and warm. Temperatures could reach above freezing temperatures at 10,000 feet while valleys warm into the forties.
The general avalanche forecast is expected to be Considerable above 9000 feet and Moderate below that elevation. At the higher elevations, wind slabs to three feet depth could be triggered in steep avalanche terrain. Although these slabs have gained strength quickly, the potential remains for human triggered large and dangerous hard slabs. At lower elevations, the potential for wet slides will increase in the afternoon as the snowpack is weakened by warm temperatures.
TREND FOR Friday, November 28, 2014 AND Saturday, November 29, 2014
The avalanche hazard will decrease during this time as the recent snowfall continues to settle and stabilize.
For further information call 307-733-2664
To report an avalanche observation call 307-739-2607
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