Bollettino valanghe

Provo

Pubblicato il Jan 25, 2021valido fino al Jan 26, 2021Utah 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

The avalanche danger is HIGH on all steep slopes at the upper elevations, where human-triggered slab avalanches are likely. The avalanche danger is also HIGH on mid-elevation steep slopes facing west, through the north, through east. We have very dangerous avalanche conditions. Slab avalanches 1-3 feet deep hundreds of feet wide are likely. These are unsurvivable avalanche conditions. Natural and human triggered avalanches are likely. Travel in avalanche terrain is not recommended. This includes snowshoeing trails or steep terrain even near parking lots.

Problemi valanghivi

Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Likely
Dimensione
3
The avalanches in Powder Park and the Tri-chutes that broke into the old weak snow near or at ground prove that the significant snowfall over the past few days has overloaded our pre-existing weak faceted snowpack. You can expect avalanches to be 2-4' deep, and if caught, probably unsurvivable. If you choose to ride on slopes steeper than 30° where this weak snow exists, you will likely trigger an avalanche.

Dangerous avalanche conditions exist, patience and avoidance will be the name of the game today. Continue to stick to low angle terrain with nothing steep above or connected to it.
Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Likely
Dimensione
2
The new snow fell on a variety of weak snow surfaces. Before the recent snow, observes had noted surface hoar and near-surface facets on the snow surfaces throughout the range. Since the snowfall, observes are still able to find these really weak interfaces. Regardless of what you want to call the old snow surface, we know it's weak, and the newest storm snow is our slab. Though this slab is not very uniform, or cohesive, new snow avalanches may still be triggered on all aspects and elevations. If triggered these avalanches may be up to 1-2' deep today. These avalanches may be particularly sensitive on steep west to north to east-facing slopes at all elevation bands and may be triggered remotely or from a distance. Any new snow avalanche triggered can step down into deeper weaker layers creating a much larger avalanche 2-4' deep.

Special Announcement

SPECIAL NOTE: HALF OF ALL SKIER/SNOWBOARDER FATALITIES SINCE 99/00 HAVE OCCURRED WITH PEOPLE GOING OUT OF BOUNDS AT A SKI AREA.

Recent Activity

Yesterday, visibility cleared in the Provo area and showed the widespread avalanche cycle that had occurred over the past few days. Control work also produced large avalanches failing at the top of the old faceted snow. Several of these slides were triggered remotely from 1000' and 2000' feet away.

The crown locations were noted as unusual, and in locations that do not typically avalanche. As always, you can find all observations and recent avalanches HERE.

Snow and Weather

This morning, skies are overcast and winds are light, gusting below 15 mph at the highest ridgelines. Mountain temperatures are in the mid-teens to low 20s F.

Storm totals:

Provo: 20-27.5" (1.67-2.52" SWE)

Today, skies will be mostly cloudy with isolated snow showers and minimal accumulation, less than 2 inches. Winds will remain light and from the Southwest, gusting less than 30 mph at the upper ridgelines. Temperatures will rise into the mid and upper-20s F.

The Outlook:

This first storm arrives today but dives well south of us for the first part of the week. Another storm sets up mid-week well to the west of us that will pummel us by strong southwest winds. It eventually ejects inland and moves overhead Friday into the weekend.

General Announcements

Please visit this website with information about Responsible Winter Recreation by the Utah Office of Outdoor Recreation.

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.

Observations and Avalanches

Backcountry Emergency Procedures