Bridger Teton Avalanche Center
WESTERN WYOMING AVALANCHE ADIVSORY
Issued on Sat December 20, 2014 6:20 PM
Increasing moisture in a zonal flow kept skies cloudy today, with areas of light to moderate snowfall in the mountains. New snow accumulations of several inches occurred overnight at the higher elevations with another several inches of accumulation late this afternoon. Winds have been southwest at 15 to 20 with gusts to 30 miles per hour. Temperatures were in the teens and 20s in the mountains and rose to near freezing in the valleys.
FORECAST FOR Sunday, December 21, 2014
A Pacific storm with an impressive moisture plume will impact the region. The National Weather Service has issued a Winter Storm Warning for our region. Snowfall may be heavy at times, especially during the period from Sunday morning through the evening. Snowfall accumulations of one to two feet are possible in the mountains by evening. In the valleys the snow may mix with rain during the day and is anticipated to change over to all snow Sunday night. West-southwest winds at 25 to 30 with gusts to 45 miles per hour will create areas of blowing snow and white out conditions. Temperatures will warm into the upper 20s and 30s in the mountains and well into the 30s in the valleys.
These storm conditions will rapidly increase the general avalanche hazard and are likely to create dangerous avalanche conditions. Natural avalanche activity is likely and may become widespread. Large events could run full track into avalanche run out zones at the lower elevations. The general avalanche hazard is expected to rise to HIGH at the upper elevations, at least to CONSIDERABLE at the mid elevations and to MODERATE at the lower elevations. Travel in avalanche terrain is not recommended at the upper elevations. Expert terrain evaluation and route selection skills are essential to avoid avalanche hazards at the mid and lower elevations.
TREND FOR Monday, December 22, 2014 AND Tuesday, December 23, 2014
Snowfall and winds will diminish and be accompanied by falling temperatures and a decreasing avalanche hazard.
For further information call 307-733-2664
To report an avalanche observation call 307-739-2607
SPONSORS: Togwotee Mountain Lodge, Box Y Ranch, Jackson Hole Mountain Resort, Brooks Lake Lodge, Wyoming State Trails Program, Bruce Hayse M.D., Wyoming Public Television KCWC, Storm Show Studios, Skinny Skis, Chippy's Kitchen and Catering, Apex Real Estate and Property Management, Teton Gravity Research, Snow King Resort, Idaho National Laboratory , Jackson Hole Mountain Guides, Grand Targhee Resort, DeFazio Law, Eric Balog, Twenty Two Designs, Jackson Hole Snow Devils, Stewart Johnson, CPA, Exum Mountain Guides, Four Pines Physical Therapy, Backcountry Access, Grand Teton Floor & Window Coverings, Outdoor Research, International Snowmobile Manufacturers Association, Danny Williams Architect, Mountain Khakis, Stio and Tiny Mo Pros