Bulletin d’avalanche

Ogden

Émis le Mar 27, 2024valide jusqu’au Mar 28, 2024Utah Avalanche Center

Danger d’avalanche

Alpin
Limite forestière
Sous la limite forestière

Périmé — ce bulletin a expiré 2 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

This morning, there is MODERATE avalanche danger on all aspects at mid and upper elevations, where human-triggered soft slab avalanches are possible.

Throughout the day, the strong sunshine will cause avalanche danger will rise to MODERATE at all elevations facing east-south-west, where it will be possible for humans to trigger wet loose snow avalanches that could lead to shallow wet slab avalanches on steep solar aspects. Dealing with a wet snow problem is a matter of timing, and avoiding being on damp surfaces during the warmest part of the day is the best approach.

Problèmes avalancheux

Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Possible
Taille
2
Over the last few days, the new snow has been reactive to backcountry travelers. The two layers of weakness, in most cases, have been density changes within the newest snow or a bit deeper at the new snow/old snow interface in general. This morning the new snow, in combination with the bump in winds will remain a concern.

A few standout avalanches were the slide in Silver Fork and the avalanche on LSB. Both of these avalanches were much deeper and had more slab characteristics than other reported avalanches. The debris in these slides would be deep enough to have buried a rider, and while it still meets the description fitting of moderate avalanche danger, it would be considered a large avalanche in an isolated area. With the bump in ridgetop winds last night and the increased sun effect we will see today, I would expect to see more cohesive avalanches occurring today.

Today, it will be possible to trigger a soft slab avalanche avalanche failing on a density change or on the new snow/old snow interface. If the slope has had any wind or sun affect, you may be able to trigger deeper more cohesive avalanches 14"-24" deep, breaking above you.
Loose Wet
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Likely
Taille
1
With today's clear skies and increased temperature, expect to see wet-loose avalanche activity on all solar aspects with daytime warming. This will be most evident in areas out of the wind zone and in steep rocky gully features facing the southerly half of the compass. With the warmer temperatures and strong sun, there is also a chance for more cohesive slab avalanches that have more wet characteristics like the one on Ricardo's Roll. The best way to avoid this problem is to be off of sunny slopes before they start to take too much heat. Roller balls, dripping water off of rocks, and your boots or skis sinking into the surface snow are signs it's time to move to higher elevation terrain.

With warming temperatures and a lot of cold snow available, roof slides are a concern. Be aware of adults working solo outside or children playing, as these are the people most susceptible to roof slides.

It's the time of year when it's easy to fall back on heuristic traps based on past experience, particularly familiarity. Keep your head about you when traveling in the mountains as even a small avalanche could have real consequences. Read more about heuristics and decision making from local avalanche researcher Ian McCammon HERE.

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Recent Activity

No new avalanches were reported in the Ogden area mountains yesterday.

South of Ogden, in the Central Cottonwoods, reports came in of soft slab avalanches up to 2 feet deep in Conehead, Benson and Hedges, the Brighton Perimeter, Argenta, and Little Superior Bowl. Among these, the avalanche that particularly caught my attention occurred in Little Superior Bowl. Although details are limited, it was reported as being 2 feet deep and 400 feet wide. This incident more closely resembles the avalanche in Silver Fork from Monday, which I went and checked out yesterday. Both of these avalanches stand out for their considerable depth compared to other reported avalanches over the last two days, displaying more slab-like characteristics.

Avalanche Heat map from the past 5 days for the Salt Lake, Provo, and Ogden area mountains.

Read all the observations HERE.

Snow and Weather

This morning, under broken skies trailhead temperatures are in the mid-20s °F, while the highest peaks are in the mid teens °F. Winds have picked up since yesterday, blowing from the west, gusting to the 30s MPH. There was another trace to 3" of snow overnight. This storm has stealthily added a decent amount of water to some locations, bringing close to 25" of new snow to the Ogden area mountains in areas.

Today, expect lingering lake-effect precipitation in northern Utah to fade by morning due to incoming high pressure, resulting in warming and drying conditions. The day will start mostly sunny but become mostly cloudy later. Temperatures will range from 34-37°F with no snow accumulation expected. Winds will be moderate, with gusts up to 20-25 MPH at mid-elevation and up to 35 MPH at upper-most elevations.

Looking ahead, after a brief break today, a strong cold front will move across northern Utah on Thursday, slowing over central or southern Utah by Thursday night or Friday morning. It will weaken and return northward on Friday, with more precipitation likely through the weekend.

Read the updated forecast discussion from our partners at the National Weather Service HERE.

General Announcements

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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

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