TETON AREA FORECAST
Issued at 01/13/2021 05:59   Valid until: 01/13/2021 23:59
CURRENT CONDITIONS (Mountain Weather Past 24 Hours)
At 10,400' Elevation 5 AM Temp Max Temp Avg Wind Dir Avg. Wind Speed Max Wind Gust
Rendezvous Summit 23 º F 24 West-Southwesterly 21 54
Location Elevation Snowfall/Prec. Total Snow Depth Total Snowfall
Raymer Plot 9,300' 3"/ 0.33 65" 208"
Rendezvous Bowl 9,580' 3"/ 0.30" 63" 232"
Chief Joseph Plot 8,800' 3"/ 0.24" 66" 178"
Mountain Weather Forecast for Today
Snow will be heavy at times this morning through 5pm this afternoon. A Winter Weather Advisory is in effect through 11pm tonight.
Temperature forecast for 8,000 - 9,000: Rising to near thirty degrees before colder air arrives this evening.
Ridge Top Wind Forecast for 10,000´: Southwesterly at 30- 40 mph, veering to northwesterly later this afternoon.
Snowfall Expected Next 24 Hours : 5-7
GENERAL AVALANCHE HAZARD
Elevation Morning Rating Afternoon Rating
High Elevations (9,000´-10,500´) 3-CONSIDERABLE 3-CONSIDERABLE
Mid Elevations (7,500´-9,000´) 3-CONSIDERABLE 3-CONSIDERABLE
Low Elevations (6,000´-7,500´ 2-MODERATE 2-MODERATE
General Avalanche Advisory
Continued snowfall and very strong winds will quickly form new surface slabs as well as rapidly add load to persistent weak layers that are buried within the snowpack. The chance to trigger either of these avalanche problems will increase throughout the day as dense snow accumulates and winds veer from the southwest to the northwest. Dangerous avalanche conditions exist and natural avalanche activity will be possible at the mid and upper elevations by the end of the day. Cautious route finding and conservative decision making is the best way to avoid involvement in hard to predict persistent slab avalanches.

TODAY'S AVALANCHE PROBLEMS

TYPE OF PROBLEM
ASPECT/ELEVATION
Wind Slab
Avalanche problem rose
CHARACTERISTICS
LIKELIHOOD
Certain
Very Likely
Likely
Possible
Unlikely
SIZE
Historic
Very Large
Large
Small
TREND
Increasing trend
DESCRIPTION
New snow is forming wind slabs over faceted snow, surface hoar and crusts above 8000 feet. These slabs will increase in size and sensitivity as the day progresses and could have depths to a foot by later this afternoon.
TYPE OF PROBLEM
ASPECT/ELEVATION
Persistent Slab
Avalanche problem rose
CHARACTERISTICS
LIKELIHOOD
Certain
Very Likely
Likely
Possible
Unlikely
SIZE
Historic
Very Large
Large
Small
TREND
Increasing trend
DESCRIPTION
The relatively wet and heavy snow that is falling will quickly add stresses to buried weaknesses in the snowpack. Although the level of weakness varies by location, these layers can generally be found at all elevations and most aspects. Release of these slabs is hard to predict and failure could occur after a slope is tracked when a weak or thin spot on a slope is impacted. By the end of the day, potential slab depths could reach five feet at the higher elevations and two feet at low elevations where the snowpack structure is poor.
For further information call 307-733-2664 To report an avalanche observation call 307-739-2607