General Avalanche Hazard : Wednesday the 26th

  • Current Temps Base 49° Summit 61°
  • SnowFall Last 24 : 0"

  • SnowFall Next 24 : Trace to 2

Snow Fall Past 24 Hours

  • Past 24 Snow/Prec. Depth Total
  • Jackson: 0" 0" 0"
  • Targhee: 16" 37" 81"
  • Raymer: 20"/ 2.64 44" 87"
  • Rendez: 21"/ 2.73" 45" 91"
  • Joseph: 16"/ 2.63" 37" 81"

Weather Past 24 Hours

  • Past 24 At 10,400
  • 5 AM Temp : 24 º F

  • Max Temp : 25

  • AVG Wind Dir : West-Southwesterly

  • AVG Wind Speed : 30

  • Max Gust : 61

Todays Forecast

West-southwest at 25 to 30 miles per hour with higher gusts.

Rising into the 30s.

Gradual clearing with lingering mountain snow showers or flurries during the morning hours.


General Advisory

GENERAL AVALANCHE ADVISORY Moisture from the subtropics has impacted the area. The mountains have received two feet of new snow with about 3 inches of moisture since early yesterday morning. Rain fell at the lower elevations and the freezing level appears to be around 7,800 at 5 AM. Temperatures at 10,500 feet are 13 degrees warmer than they were 24 hours ago. Very strong westerly winds have drifted the new snow. At the mid and upper elevations an extreme case of rapid loading has occurred that has created unstable conditions and is testing the strength of buried weak layers. Natural and human triggered avalanches are possible. Dangerous conditions exist and travel in avalanche terrain is not recommended at the upper elevations. Heavy rain has impacted the snow at the lower elevations. With warming temperatures in the forecast expert route selection skills and conservation decisions are essential for safe travel at the mid and lower elevations.

Situation

SITUATION Subtropical moisture began to stream into the region from the northwest after midnight and brought abundant snow to the region during the day. This flow favored the Teton Range and the Togwotee Pass area. Up to 16 inches of new snow with close to two inches of moisture have fallen in those areas since midnight. Lesser amounts, six to twelve inches, have fallen in the Greys River area. This snowfall has been accompanied by rising temperatures and strong west-southwest winds that have created areas of unstable snow. Summit winds since the snow began have averaged 25 to 35 miles per hour with gusts 60 miles per hour. The new snow is upside down, which means there is heavy snow on top of lighter colder snow. Density breaks in the snow were very sensitive to human triggers and wind loading. Rapid loading is also testing buried weak layers comprised of faceted snow that are deeper in the snowpack.

FORECAST FOR Wednesday, November 26, 2014 The wind and snow is expected to continue through the night and then taper off in the morning. Partial clearing of the skies are likely during the day. Another foot of new snow is possible before skies begin to clear. Temperatures at 10,500 feet increased 10 degrees during the day and are forecast to increase another five degrees by sunrise. On Wednesday temperatures will rise to near freezing at 10,500 feet and to near 40 at the lower elevations. Winds will be westerly at 25 to 30 with gust to 40 miles per hour overnight and back towards the southwest and relax to around 20 miles per hour during the day. Surface slabs one to three in depth involving the recent new snow could be human triggered or release naturally at the mid and upper elevations. On steep, northerly aspects above an elevation of 9,000 feet these slabs have potential to step down to the ground with depths to four feet. The general avalanche hazard is expected to be CONSIDERABLE at the upper elevations, MODERATE at the mid elevations and LOW at the lower elevations.

TREND FOR Thursday, November 27, 2014 AND Friday, November 28, 2014 Dry and warm with some clouds. The general avalanche hazard will be on the decrease.

Weather Station Data

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Data Provided by :http://www.jhavalanche.org | http://www.jacksonhole.com

Last Update : November 26 2014 3:16:16 PM

Page Cache: November 26 2014 3:43:49 PM

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Teton Pass ( Click to Zoom )

Top of Gondi

Base Area

Tram Line

Grand Targhee

Weather Station Data

Snow Report Phone Numbers

Emergency Phone Numbers

Page Cache: November 26 2014 3:43:49 PM

We do not guarantee the accuracy of any of this information. This site is just a tool to help you make better decisions in the mountains. If you have a suggestion about how to make this site better email me.

Radar Images ( Click to zoom )





Forecast Data from http://www.noaa.gov/

Weather Station Data

Snow Report Phone Numbers

Emergency Phone Numbers

We do not guarantee the accuracy of any of this information. This site is just a tool to help you make better decisions in the mountains. If you have a suggestion about how to make this site better email me.