SOUTHWEST TRAILS/GREY'S RIVER AREA FORECAST

Issued at 04/19/2019 06:47   Valid until: 04/19/2019 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
Mt Coffin 29 º F 30 West-Northwesterly 29 50
View Temperature and Wind Graphs View Mt Coffin 48 Hr Wind Graph
Location Elevation Snowfall/Prec. Total Snow Depth Total Snowfall
Comissary Ridge Plot 9,330' 0"/ 0.00 98" 377"
Blind Bull Meadow Plot 9,000' 0"/ 0.00" 83" 293"
Box Y Ranch Plot 6,300' 0"/ 0.00" 33" 166"
Mountain Weather Forecast for Today
Expect warm temperatures and mostly sunny skies as a ridge of high pressure resides over the region.
Temperature forecast for 8,000 - 9,000  
Rising into the mid 40s.
Ridge Top Wind Forecast for 10,000´
Westerly to northwesterly at 15 to 25 miles per hour.
Snowfall Expected Next 24 Hours
0
General Avalanche Advisory
Clear skies overnight and near freezing temperatures have frozen snow surfaces, and mostly stable conditions exist in the early morning hours. Mountain temperatures are starting out around 10 degrees warmer than yesterday morning, and the general avalanche hazard will quickly rise to Considerable above 7,500 feet as crusts break down and snow surfaces become saturated. As this happens, dangerous avalanche conditions will develop, and naturally releasing wet loose slides and large to very large wet slabs will become likely. Glide avalanches will also be possible. Get a very early start, be prepared for the rapid development of wet slides, and get off of and out from under avalanche prone terrain before conditions become unstable. While the snowpack below 7,500 feet has undergone numerous melt freeze cycles, wet slides may still be possible where the snowpack remains. The final morning avalanche hazard bulletin of the season will be issued on Sunday, April 21st.

Today's Avalanche Problems

Wet Slab

ASPECT/ELEVATION
Avalanche problem rose
CHARACTERISTICS
LIKELIHOOD
Certain
Very Likely
Likely
Possible
Unlikely
SIZE
Historic
Very Large
Large
Small
TREND
Increasing trend

DESCRIPTION

Yesterday, abundant sunshine and warm temperatures resulted in significant avalanche activity in the Tetons as the April snowfall was substantially heated for the first time. Temperatures will be warmer today, and large to very large wet slab avalanches will quickly become likely above 7,500 feet. These slabs could be one to three feet deep. Smaller wet loose slides will also become likely on very steep terrain features. These wet slides could travel long distances into low elevation terrain and may gouge down to the ground in areas where the snowpack is isothermal.
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