Bollettino valanghe

Salt Lake

Pubblicato il Feb 2, 2024valido fino al Feb 3, 2024Utah Avalanche Center

Pericolo valanghe

Alta quota
Limite del bosco
Sotto il limite del bosco

Non aggiornato — questo bollettino è scaduto 3 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

The avalanche danger is MODERATE at the mid and upper elevations where soft slabs of new snow or wind-drifted snow may be sensitive, especially during any period of heavy snowfall or wind-drifting. Watch for signs of cracking as an indication of instability.

There is also a possibility of triggering a large and dangerous avalanche failing in a buried persistent weak layer on steep mid and upper-elevation slopes facing west through north and southeast. If you trigger one of these avalanches, it will break 3-6' deep and well over a hundred feet wide.

There is a LOW danger at low elevations.

Expect a rising avalanche danger with snow and wind forecast through much of the next 7 days.

Problemi valanghivi

Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
2
The new snow may be reactive today, especially during any period of higher precipitation intensity (PI) or wind-drifting. Issues with the new snow will be soft slabs of storm snow and wind-drifted snow 6-12" thick. Instabilities may occur at the interface with the old snow surface or within storm or wind-blown snow. Any avalanches may run fast and far on southerly aspects where the new snow fell on a slick surface.
Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
3
Three avalanches failing in the persistent weak layer (PWL) over the past week indicates this avalanche problem remains a serious concern. Yesterday, UAC forecaster Dave Kelly and I visited the site of Tuesday's skier-triggered avalanche in Days Fork. This avalanche occurred on a steep, upper-elevation north-facing slope and was most likely triggered from a thin spot on the slope and propagated well over a hundred feet wide, with a crown up to 7' deep in places.

UAC forecaster Nikki Champion was in Mineral Fork and describes the PWL issue in her observation and this video:

Recent Activity

No avalanches were reported from the backcountry on Thursday, but three large avalanches failing in the PWL over the past six days should stay in your mind:

Sunday - Skier-triggered avalanche in Davis Gulch on Gobblers Knob

Monday - Natural avalanche in Mineral Fork

Tuesday - Skier-triggered avalanche in Days Fork (photo below looking up at the crown which was 6' deep in places)

These avalanches were 3-6' deep, well over a hundred feet wide, and running up to 2,000'. The two skier-triggered avalanches were close calls, and luck is not a good strategy when dealing with a PWL.

Snow and Weather

Overnight into this Morning: Temperatures are in the mid 20's F. Winds are from the south and light at low and mid elevations, with gusts into the 20's mph at the upper elevations. Snowfall began overnight with 3-6" (containing up to 0.6" water) as of 6 am.

Today: Temperatures will reach the low to mid 30's F. Winds will be from the south this morning and shifting westerly throughout the day, and from the west/northwest by sundown. Wind speeds will remain light at low and mid elevations, with gusts into the 20's mph at the upper elevations. 3-6" of snow, with periods of heavy snow possible, especially by late afternoon.

This Weekend and Beyond: More snow overnight and into Saturday, with weekend snow totaling close to 2' in some locations. A brief break on Sunday with heavy snow likely Monday through at least Wednesday.

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.

Observations and Avalanches

Backcountry Emergency Procedures