Bollettino valanghe

Provo

Pubblicato il Apr 4, 2020valido fino al Apr 5, 2020Utah Avalanche Center

Pericolo valanghe

Alta quota
Limite del bosco
Sotto il limite del bosco

Non aggiornato — questo bollettino è scaduto 6 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

This morning we have very localized areas of MODERATE danger for wind slabs along the highest elevations. They'll be most prominent on north to east facing slopes above about 10,000' but not limited to these aspects. With increasing winds this afternoon, these drifts will become more sensitive and widespread.

The danger for wet avalanches will rise to MODERATE on all steep sunlit (east-south-west facing) slopes.

All other terrain has a mostly LOW danger.

Problemi valanghivi

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
2
Sensitive, pockety and shallow wind drifts will be found along the highest elevation bands this morning...and with steadily increasing southwest winds today, these drifts will become larger and more widespread. As the drifts will be landing on weak recrystallized surface snow, it may be possible for some of these drifts to be quite "touchy", and even triggered at a distance on some slopes.

TREND: Increasing

The large, overhanging cornices become more tender in the spring and start to calve either naturally or with the additional weight of a person. Cornice-related fatalities account for about 5% of our accidents.
Loose Wet
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
2
Both natural and wet loose sluffs are expected with rapid warming and direct sun today. These will start on east, then south, then westerly facing aspects. Unseasonably cold temps and touch of wind kept the lid on the wet activity yesterday; today will offer no such reprieve. I expect the mid week storm snow (roughly 4-6") today to become fully saturated, unstable, and run on the early week sun crusts.

Timing will be key today: Too early and you'll find slide-for-life conditions on the slick refrozen crusts; Too late and you'll put dramatic ruts in the wet snow on low angle slopes; on steeper slopes you are likely to trigger wet avalanches. Although these run more slowly than dry sluffs; the debris sets up like concrete.

Trend: Increasing

Special Announcement

Spring Awareness Campaign - Help us save lives through avalanche forecasts and education. Consider making a donation before April 8th. We are sad to share the news of two recent avalanche fatalities:

On Wednesday, Trace Carrillo died in an avalanche on Taylor Mountain near Teton Pass. Trace was formerly an intern with the UAC and more recently a wilderness ranger with the Forest Service. Article here. Preliminary report here.

On Friday, Rob Kincaid died in an avalanche just north of Palisades Reservoir near the ID/WY stateline. Rob was well known by many snowmobilers as an athlete for Arctic Cat and veteran of many snowmobile competitions. Article here. Preliminary report here.

More details should be available soon about these tragic events but initial reports are that both men were wearing avalanche transceivers that were not turned on.

January 5, 2019 - Read this collection of 6 stories and a podcast about that day with a low avalanche danger, 8 skier-triggered avalanches, four catch and carries, a partial and critical burial, and a trip to the emergency room.

Recent Activity

Pro observer Kory Davis noted some recent larger slab avalanches in Primrose Cirque and what appears to be off the Timp summit ridge yesterday. Photos below. They appear to be triggered by cornice fall or sluffs cascading from above.

Snow and Weather

Skies are clear.

Winds are from the west-southwest blowing 10-15mph with gusts to 25. The highest anemometers at 11,000' have wind speeds 25-35mph with gusts to 45.

Temperatures continue their upward march and are in the upper 20s to low 30s.

Snow surface conditions range from soft settled powder at the mid and upper elevation northerly aspects...and something that resembles corn on the other aspects.

For today, we'll have clear skies with ridgetop temperatures rising to the mid-30s.

The southwest winds will gather steam over the course of the day with hourly averages reaching 25mph with gusts to 40mph by the afternoon.

Additional Info

Information on outdoor recreation - The State of Utah created this webpage with information about recreating on both state and federal public lands during the current health crisis.

Skiing and riding at closed ski resorts - Some resorts allow access now, and some do not. Please check HERE for the latest info on ski area access.

New to the backcountry (including riding at closed resorts) - Watch the award-winning, 15 minute Know Before You Go video, or take the 5-part, free online-learning series.

General Announcements

CLICK HERE FOR MORE GENERAL INFO AND FAQ

This information does not apply to developed ski areas or highways where avalanche control is normally done. This forecast is from the U.S.D.A. Forest Service, which is solely responsible for its content. This forecast describes general avalanche conditions and local variations always occur.

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