General Avalanche Hazard : Tuesday the 23rd

  • Current Temps Base NA° Summit NA°
  • SnowFall Last 24 : 16"

  • SnowFall Next 24 : 1 to 2

Snow Fall Past 24 Hours

  • Past 24 Snow/Prec. Depth Total
  • Jackson: 16" 243 " 88 "
  • Targhee: 16" 94" 235"
  • Raymer: 16"/ 0.70 77" 239"
  • Rendez: 16"/ 0.70" 88" 243"
  • Joseph: 16"/ 0.80" 89" 205"

Weather Past 24 Hours

  • Past 24 At 10,400
  • 5 AM Temp : 6 º F

  • Max Temp : 11

  • AVG Wind Dir : West-Southwesterly

  • AVG Wind Speed : 14

  • Max Gust : 32

Todays Forecast

Westerly at 15 to 20 with gusts to 30 miles per hour

Rising into the teens and 20s

Mostly cloudy skies with some lingering periods of light snowfall in the mountains


General Advisory

GENERAL AVALANCHE ADVISORY New snow that has fallen during the past five days lies upon a well-developed layer of buried surface hoar. On south facing slopes, that surface hoar formed upon a sun crust. Today's avalanche problems include loose snow slides, new soft surface slabs and persistent deep slabs. Human triggered avalanches are likely in steep terrain on a variety of aspects. A deep persistent avalanche hazard remains. Small surface slides could step down and cause large to very slab avalanches.

Situation

SITUATION Skies remained clear overnight on Sunday before cloud cover moved in Monday morning. Steady, light density snowfall soon followed in the Tetons and continued throughout the day. The Togwotee Pass and Southwest Trails forecast zones mostly missed out on the new snowfall. Mountain and valley temperatures rose into the low teens, and westerly ridgetop winds backed to the southwest at 5 to 15 miles per hour. With clear skies overnight on Sunday, surface hoar continued to develop. By Monday evening, the Tetons had received up to 10 inches of light density snow which added between 0.3 and 0.4 inches of water weight to the snowpack. Only an inch or two of new snow fell in the Togwotee Pass and Southwest Trails areas. The low density snow and light winds kept new slab development at bay and had little to no impact on the persistent deep slab problem. Near Island Park in Eastern Idaho, which has a similar snowpack to Western Wyoming, a snowmobiler was caught, buried and killed in an avalanche on Saturday afternoon.

FORECAST FOR Tuesday, January 23, 2018 Snowfall will begin to dissipate overnight as dry, northwesterly flow aloft develops ahead of a transitory ridge of high pressure. A few light snow showers could linger over the Tetons on Tuesday. Overnight lows in the mountains will be in the mid to upper single digits before rising into the mid-teens in the afternoon. Southwesterly ridgetop winds will veer to the west at 10 to 20 miles per hour. While the likelihood of triggering persistent deep slabs continues to decrease, the high consequences of being caught will keep the general avalanche hazard above 7,500 feet at the low end of CONSIDERABLE on Tuesday. Large triggers, such as snowmobiles, are more likely to be able to impact the deeply buried December drought layer, but the weight of a single person could trigger one of these two to five feet deep slabs if a weak, shallow trigger point is encountered. Hanging snowfields and other unsupported slopes are more likely to see avalanche activity and should be avoided. Below 7,500 feet, skiers and riders might be able to trigger an isolated pocket of slab up to two feet deep in very steep, shaded gullies and ravines.

TREND FOR Wednesday, January 24, 2018 AND Thursday, January 25, 2018 Mostly dry conditions are in store for Wednesday before the chance of new snow increases on Thursday. The chance of triggering persistent deep slabs will continue to decrease.

Weather Station Data

Snow Report Phone Numbers

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

Last Update : January 23 2018 2:03:30 PM

Page Cache: January 23 2018 3:18:02 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: January 23 2018 3:18:02 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.

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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.