Western Wyoming PM Forecast
Issued on Fri April 03, 2020 8:37 PM
SituationCold wintery conditions visited the mountains of Western Wyoming today. Partly to mostly cloudy skies kept the sun’s effects on snow surfaces to a minimum. The highest peaks were shrouded in clouds and isolated periods of occasion snowfall had accumulation of a trace to few inches. Mountain temperatures started in the single digits and climbed into the teens and 20s. Southerly winds began light in the morning and by the afternoon increased to 10 to 20 miles per hour.
On the highest peaks in the afternoon, gusty winds transported snow onto leeward slopes. Recent wind slabs have become less reactive, and daily snow settlement in the mountains has slowed to an inch or less. A skier, in Hoback Canyon, unintentionally triggered a small slab avalanche and was carried several hundred feet.
We are very sad to say that we have been told that there was another avalanche fatality today that involved a snowmobiler. Initial information indicates this accident may have occurred in the Sheep Creek drainage east of Palisades Reservoir. We will post more information as it becomes available. Our deepest condolences are extended to all involved.
Forecast For Saturday, April 04, 2020Overcast to mostly cloudy skies overnight should clear by the morning as a brief ridge of high pressure builds over the region. On Saturday, skies are expected to be mostly sunny until the late afternoon when cloud cover will increase. Mountain temperatures will range from the teens to low thirties and valleys will climb into the upper 30's. Southwesterly winds should be 15 to 25 miles per hour.
The general avalanche hazard is expected to be moderate tomorrow at the higher elevations (above 9,000 feet) and low below that elevation. Humans who venture into steep avalanche prone terrain features at the upper elevations could trigger slab avalanches up to 2 feet deep. These slabs may increase in sensitivity during the warmest periods of the day. Due to clear skies and above freezing temperatures, wet loose avalanches could be possible on solar aspects in the afternoon. As snow surfaces transition from damp to wet, backcountry travelers are recommended to seeks shaded terrain.
Please be conservative with your actions and stay up to date with the Teton County Wyoming Health Department emergency alerts, http://www.tetonwyo.org/163/Health-Dept.
Trend For Sunday, April 05, 2020 AND Monday, April 06, 2020Pacific moisture is expected to bring light snowfall to the region Saturday night into Monday. The general avalanche hazard is expected to slowly decrease during this unsettled weather.
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