SOUTHWEST TRAILS/GREY'S RIVER AREA NOWCAST
Issued at 01/16/2018 06:45 Valid until: 01/16/2018 23:59
CURRENT CONDITIONS (Mountain Weather Past 24 Hours)
|At 10,400' Elevation:
||5 AM Temp: 20 º F
||Max Temp: 23
||Avg Wind Direction: Northnortheast
||Avg. Wind Speed: 7
||Max Wind Gust: 25
||Total Snow Depth
|At 9,330' Elevation (Commissary Ridge Plot)
|At 9,000' Elevation (Blind Bull Meadow Plot)
|At 6,300' Elevation (Box Y Ranch Plot)
Mountain Weather Forecast for Today
Skies will be mostly clear above areas of valley fog.
|Temperature Forecast for 8,000´-9,000´:
||Temperatures will rise into the upper 20s and low 30s
|Ridge Top Wind Forecast for 10,000´:
||Southwest at 5 to 15 miles per hour
|Snowfall Expected Next 24 Hours:
GENERAL AVALANCHE ADVISORY
The snow pack remains unstable. Very large slab avalanches are likely to be triggered by humans and can still release naturally. Yesterday in the Teton area a very large avalanche released naturally and ran full track. A snowmobiler triggered a very large slab avalanche and a skier remotely triggered a large slab avalanche. Similar conditions exist in the Southwest Trails area and these type of events are likely to occur in this area today. Sunshine and warming temperatures will be increasing the likelihood for these dangerous slides to release. The consequences of being caught in one of these slabs would be severe. Expert terrain analysis skills and conservative terrain choices are essential for safe travel in avalanche terrain.
Dense slabs up to five feet in depth lie upon a persistent weak layer of faceted snow. These slabs could be triggered on a variety of aspects by the weight of a single person, release naturally or release after they have been crossed by multiple skiers or riders. At the lower elevations (below 7,500 feet) small pockets of dense slab up to two feet in depth could be human triggered on steep avalanche prone slopes.
Wind slabs up to 30 inches in depth could be human triggered in steep wind loaded avalanche starting zones and on convex roll overs. Once triggered these slabs could step down and create a very large deep persistent slab avalanche.
For further information call 307-733-2664
To report an avalanche observation call 307-739-2607
SPONSORS: Box Y Ranch, Togwotee Mountain Lodge, Jackson Hole Mountain Resort, Wyoming State Trails Program, Brooks Lake Lodge, Bruce Hayse M.D., Skinny Skis, Chippy's Kitchen and Catering, Jackson Hole Ski Atlas, Grand Targhee Resort, DeFazio Law, Eric Balog, Stewart Johnson, CPA, Grand Teton Floor & Window Coverings, Exum Mountain Guides, International Snowmobile Manufacturers Association, Apex Real Estate and Property Management, RPK3 Law, Snake River Brewing, Redfin, Tip Top Search and Rescue, Next Level Riding Clinics, Exploradus, Deuter - Ortovox, Colorado School of Mines, Stio, Eco Tour Adventures and Steve Romeo Memorial Fund