SOUTHWEST TRAILS/GREY'S RIVER AREA NOWCAST
Issued at 12/11/2013 06:37 Valid until: 12/11/2013 23:59
CURRENT CONDITIONS (Mountain Weather Past 24 Hours)
|At 10,400' Elevation:
||5 AM Temp: 5 º F
||Max Temp: 5
||Avg Wind Direction: West-Northwesterly
||Avg. Wind Speed: 21
||Max Wind Gust: 45
||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
Mostly sunny skies above areas of morning valley fog.
|Temperature Forecast for 8,000´-9,000´:
||Rising into the teens.
|Ridge Top Wind Forecast for 10,000´:
||Westerly at 10 to 25v miles per hour.
|Snowfall Expected Next 24 Hours:
GENERAL AVALANCHE ADVISORY
The general avalanche hazard is MODERATE above an elevation of 7,500 feet and LOW below that elevation. At the mid and upper elevations slab avalanches up to three feet in depth could be human triggered in steep, wind loaded avalanche starting zones. On steep northerly aspects above an elevation of 9,000 feet these slabs could step down to the ground. Avalanches are unlikely at the lower elevations.
Recent west and northwest winds have formed pockets of dense wind slab up to two feet in depth. In addition dense wind slabs up to three feet in depth remain from last weeks storm. In some areas these older wind slab lie upon buried layers of faceted snow that formed in late November. Humans, especially those on snowmobiles could trigger these slabs. If these surface slabs are triggered on steep northerly aspects above an elevation of 9,000 feet they could step down to the ground.
Weak faceted snow exists at the base of the snow pack on shaded aspects above an elevation of 9,000 feet. Some potential persists for humans, especially those on snowmachines to trigger dangerous hard slab avalanches to the ground on this weak persistent layer. Previous tracks should not be interpreted as a sign of stability.
For further information call 307-733-2664
To report an avalanche observation call 307-739-2607
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