Forecast for the Salt Lake Area Mountains

Issued by Bruce Tremper for
Friday, April 26, 2013

The danger is Low but will rise to Moderate for wet avalanches each day with sun warming. Stay off of--and out from underneath--any slope approaching 35 degrees or steeper that is getting wet. Get out early and get home early. The danger may rise to Considerable this weekend.

Low
Moderate
Considerable
High
Extreme
Learn how to read the forecast here
Special Announcements

Wet avalanche conditions this weekend will be unpredictable, especially in the Uinta Mountains where a more unstable snowpack usually exists. We urge everyone to choose conservative terrain this weekend. Stay off of--and out from underneath--steep slopes in the heat of the afternoon.

I will issue intermittent advisories as conditions warrant for the Salt Lake region only. They will end for the season after this weekend. I will still post observations from you each evening and early morning as well, so if you're getting out, please let everyone in our community know what you find. The rest of our staff is off for the season and most of the ski resorts are closed for the season, so your feedback and observations are important.

Weather and Snow

We had a good refreeze last night with temperatures in the upper 20's with clear skies. We should have some decent corn on southerly facing slopes. You can also still find some dense, soft, dry snow on the upper elevation, north facing slopes.

This is the 7-day temperature chart for Alta. The last snowstorm was last Saturday with a big warm up on Sunday. Temperatures will continue to warm through the weekend.

Check the Snow Page for more details.

Recent Avalanches

Yesterday, avalanche control produced some class 1 and 2 wet avalanches on east and southeast facing slopes. There were no reports from the backcountry.

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Avalanche Problem #1
Wet Snow
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I hate forecasting for wet avalanches because they are so unpredictable. When faced with uncertainty, most avalanche experts choose conservative terrain, which is what I urge everyone to do through the weekend.

This is the first extended warm up after several snowy weeks. Snow does not like rapid change, and on many slopes, over 2 feet of settled, dry snow is getting wet for the first time. I'm hoping that the warming will come slowly enough and combined with expected refreezes each night, that it will keep wet activity to a reasonable level. But then again, wet avalanches are very unpredictable. Anyone venturing into the Uinta Mountains should be especially cautious because--as usual--the Uintas still have buried layer of persistently weak, faceted snow that can produce deep, large avalanches. Also notice, the yellow (Moderate) on the danger rose has expanded to include most aspects and elevations with the exception of the high elevation northerly facing terrain.

Today and through the weekend, you should get out early and get home early. Definitely stay off of--and out from underneath--any steep slope when it gets wet. I will call the avalanche danger Moderate today but it could rise to Considerable this weekend.

Note on the danger rose: almost no snow exists on southerly facing slopes below 8,000'.

Also, remember, most of the ski resorts are closed for the season with no avalanche control, so treat it just like backcountry terrain.

Additional Information

We should have euphorically beautiful weather through the weekend with clear skies and very warm temperatures. The daytime high should be near 50 degrees and near 55 degrees over the weekend. Overnight lows should be near freezing and combined with clear skies, the snow surface should refreeze each night but it may be a thin refreeze later in the weekend.

The extended forecast is for cooler temperatures on Monday.

You can always check the Cottonwood Canyons Forecast, which you can find on the Snow Page.

You can also check your local NWS weather forecast, for example, here is the one for Alta. You can click on any spot in the state for a local forecast. You can also click on the satellite loops, radar loops or the hourly weather graph in the lower right of any forecast.

General Announcements

If you trigger an avalanche in the backcountry - especially if you are adjacent to a ski area – please call the following teams to alert them to the slide and whether anyone is missing or not. Rescue teams can be exposed to significant hazard when responding to avalanches, and do not want to do so when unneeded. Thanks.

Salt Lake and Park City – Alta Central (801-742-2033), Canyons Resort Dispatch (435-615-3322)

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Subscribe to the daily avalanche advisory e-mail click HERE.

UDOT canyon closures UDOT at (801) 975-4838

Remember your information can save lives. If you see anything we should know about, please participate in the creation of our own community avalanche advisory by submitting snow and avalanche conditions. You can also call us at 801-524-5304 or 800-662-4140, email by clicking HERE, or include #utavy in your tweet.

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For a print version of this advisory click HERE.

This advisory is produced by the U.S. Forest Service, which is solely responsible for its content. It describes only general avalanche conditions and local variations always exist. Specific terrain and route finding decisions should always be based on skills learned in a field-based avalanche class.