Bollettino valanghe

Ogden

Pubblicato il Apr 17, 2025valido fino al Apr 18, 2025Utah Avalanche Center

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Non aggiornato — questo bollettino è scaduto last year. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Thank you for a great season! Regular avalanche forecasts have ended. This most recent update is from Thursday April 17, 2025. We will be issuing intermittent updates through May 1st. You can submit observations and avalanches HERE, and check out the most recent observations and avalanches HERE.

During the spring, there are typically three different avalanche problems:

Wet Snow: Wet loose avalanches, wet slab avalanches, roof slides, and glide avalanches
New Snow: New storm snow instabilities; soft slab avalanches and loose dry avalanches
Wind Drifted Snow: Wind slabs; soft or hard drifts of wind-blown snow

Problemi valanghivi

Loose Wet
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When cold, dry snow becomes wet for the first time, it almost always means wet sluffs (loose snow that fans outward as it descends).

Larger wet slab avalanches can happen when melt water percolates through a layered, winter snowpack for the first time especially after multiple days of warm temperatures combined with no refreeze at night.

Warning signs may include:

Rollerballs (pinwheels) in new snow that is getting wet for the first time

Natural or human triggered wet sluffs

Small sluffs fanning out into larger slides or running long distances

Cornices breaking off

These signs mean it's time to head home or change to an aspect with cooler snow. Remember, even "smaller" slides can be dangerous in high-consequence terrain, such as above a terrain trap, trees, rocks, cliffs, or a long, large avalanche path.
Storm Slabs
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We almost always get winter-like snow storms well in the spring. Treat each storm just like you would in winter. Avalanches can occur within the new snow typically from 1) low-density layers deposited during the storm, 2) high precipitation intensity during a storm, and 3) from wind slabs created during the storm.

It's easy to test the new snow as you travel by jumping on small test slopes to see if they avalanche or dig down with your hand to see how well the new snow is bonding. Snow can change dramatically in both space and time, so never let your guard down. Avoid any steep slope with recent wind deposits.

Practice good backcountry protocol:

Check your gear before every tour, and make sure each person has a working transceiver, shovel, and probe before entering avalanche terrain

Only expose one person to a steep slope at a time

Never travel above other people
Wind Slabs
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Wind can rapidly load snow onto steep slopes, making those slopes more prone to avalanching. Avoid slopes greater than 30° in steepness if you see signs of wind-drifted snow, such as rounded and pillowy features, and shooting cracks. In some cases, wind-drifts can sound hollow like a drum.

Special Announcement

If you are looking to travel uphill at the ski areas then check out the UAC Uphill Travel Policypage before heading out as many areas are still operating. Join the UAC at Brewskis in Ogden TONIGHT from 6 PM -9 PM in support of avalanche forecasting, education, and awareness in the Ogden backcountry community. I'll be giving a talk - DECISION MAKING IN HIGH RISK, LOW FREQUENCY SITUATIONS. There will be awesome raffle prizes and fun. More information and registration options HERE

Researchers Sara Boilen and Ian McCammon are developing an open-source tool to help individuals mitigate risk in avalanche terrain. The project's first stage involves interviewing backcountry recreationalists who have been traveling in avalanche terrain for at least one season. All participants will be entered to win prizes. Please encourage taking 1-2 minutes to fill out their initial survey. Link HERE

Recent Activity

We will continue to post avalanches and observations. You can submit what you're seeing HERE, and check out all recent avalanches and observations HERE.

Snow and Weather

A cold Pacific trough will move through today and tomorrow, bringing snowfall to the Wasatch. As of 6am, most areas have picked up a trace to an inch of snow with a rain/snow line around 8-8500'. Frontal passage moves through late morning to midday accompanied by heavier snowfall rates and much cooler temps. By afternoon, temps will drop to the upper-teens up high and the upper-20s down low. Winds, currently moderate from the southwest, will veer clockwise to the west-northwest. Periods of snowfall are expected through Friday with 5-10" possible in the higher elevations. I would expect to see snowfall and very light accumulation in the valleys by tonight into Friday. Temps warm through the weekend but the overall weather pattern looks unsettled for the foreseeable future. Click HERE to get to our weather page for up-to-date weather station data that will help with planning your tour based on new snow, temperature, wind speed and direction.

Our partners at the National Weather Service put out a weather discussion HERE and the mountain weather forecast will continue to be updated twice a day through the first week of May.

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