TETON AREA NOWCAST
Issued at 04/20/2018 06:29 Valid until: 04/20/2018 23:59
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CURRENT CONDITIONS (Mountain Weather Past 24 Hours)
|At 10,400' Elevation:
||5 AM Temp
||Avg Wind Direction
||Avg. Wind Speed
||Max Wind Gust
||27 º F
||Total Snow Depth
|At 9,300' Elevation (Raymer Plot)
|At 9,580' Elevation (Rendezvous Bowl Plot)
|At 8,800' Elevation (Chief Joseph Plot)
Mountain Weather Forecast for Today
Expect mostly sunny skies to develop by midday as an upper level trough over the Nevada/Utah border tracks eastward towards the four corners.
|Temperature Forecast for 8,000´-9,000´:
||Rising to near 40.
|Ridge Top Wind Forecast for 10,000´:
||Northeasterly at 15 to 25 miles per hour.
|Snowfall Expected Next 24 Hours:
AVALANCHE DANGER MORNING AFTERNOON
GENERAL AVALANCHE ADVISORY
Spring is once again gaining ground on the higher elevation, winter snowpack. Temperatures are starting out around 5 degrees warmer than yesterday morning. At the mid and upper elevations, wet slides will be the primary concern as temperatures warm and cloud cover decreases. Shallow, wet loose slides will be likely on sunlit aspects, and wet slabs might release naturally during the heat of the day. In very steep, avalanche-prone terrain that has not undergone significant warming, the chance for skiers and riders to trigger small to large wind slabs will also be on the increase. Daytime warming will also raise the likelihood of cornice failures. Get an early start, monitor the effect that warming temperatures and sunshine have on the snowpack, and have a plan to transition to cooler terrain or be willing to come back another day. At the lower elevations, the snowpack is mostly stable where it still exists.
Both wet slabs and wet loose slides will become possible today. Temperatures remained above freezing overnight in many areas up to 8,500 feet, and some cloud cover through the night limited radiational cooling. Wet loose slides will pose their greatest threat in very steep couloirs and confined terrain where small slides can quickly grow and entrain significant amounts of snow. Be mindful of both the terrain that you are on and the terrain above you. Wet slabs might develop on slopes where old, dry snow is beginning to thaw for the first time. Breaking through once supportable crusts is a good prompt to alter your travel plans.
Recently developed wind slabs up to two feet in depth can still be found in high elevation terrain that has not experienced a significant warming event. Up there, the chance for backcountry travelers to trigger these slabs will be on the increase as the day warms, and shedding of these slabs might occur naturally in the afternoon. These dry slabs are likely to be deeper and more widespread in the cooler terrain above 10,500 feet.
For further information call 307-733-2664
To report an avalanche observation call 307-739-2607
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