Forecast for the Salt Lake Area Mountains

Drew Hardesty
Issued by Drew Hardesty for
Tuesday, March 14, 2017

This morning's LOW danger will rapidly rise to at least MODERATE with direct sun and daytime highs reaching toward 60°F at 8500'. All elevation sunny aspects and low to mid elevation northerly aspects will be most susceptible to natural and human-triggered wet activity. If and when the snow becomes wet and unsupportable, it's time to move to a cooler aspect or low angle slopes.

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Learn how to read the forecast here
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Part 3 of The Little Things (that might keep you alive) is hot off the press - has to do with safe travel protocols in the backcountry. Not to be missed!

Weather and Snow

Winter, where are you tonight? As of 4am, mountain temperatures are 5-8°F warmer than they were at this time yesterday morning and we're set for daytime highs near 60°F at 8500' this afternoon. Current mountain temps are in the upper 20s at the trailheads and the mid-30s along the ridgelines. The protected thermal belt mid-elevation temps are currently in the low 40s. We still have a few hours for the snowpack to shed some more heat, but this morning's surface refreeze will be more superficial and transient than before. The westerlies are 10-15mph, gusting to 20.

The key in the spring is to start early and exit early. Sean Zimmerman-Wall had a good report from Butler Fork of BCC yesterday and was long gone by 1230pm.

Recent Avalanches

A new glide avalanche was reported in the Blue Ice area of Broads Fork of Big Cottonwood Canyon. The link takes you to the Wasatch Backcountry Skiing map and it's easy to see why so many glides occur in Broads...so much of the northeast facing terrain harbors steep slabs of rock. (zoomed photo by Zimmerman-Wall)

Ad
Avalanche Problem #1
Wet Snow
Type
Location
Likelihood
Size
Description

Much the same from yesterday except that the snow will soften much earlier than yesterday and the mid-elevation northerly aspects will also dampen and become susceptible to wet sluffs.

Just like clockwork, today's sunny aspects will transition from rock-hard coral to soft, damp, and supportable to wet and unstable. Play your cards right in playing your aspects right. Move from east to south to west facing terrain to catch that "soft, damp and supportable window" on each. And timing is everything. Arrive too early and it's a visit to the dentist's office. Arrive too late and you've put yourself at risk for wet avalanches. If you're riding through unsupportable wet snow, seeing pinwheels and rollerballs, or observing natural wet loose sluffs, it's time to hit the road.

We may start to see the much more dangerous wet slab avalanches with the radically warm temperatures during the day and superficial refreezes - at best - during the overnight hours.

For more info on wet slabs, click on link in profile.

A post shared by Utah Avalanche Center (@utavy) on

Avalanche Problem #2
Cornice
Type
Location
Likelihood
Size
Description

The cornices along the mid and upper elevation ridgelines have become enormous and unruly this year. With enhanced warming, they will continue to be exceptionally dangerous and unstable. Remember that they will break well back beyond the apex of the ridgeline. It's best to approach any ridgeline with caution or with a spotter who can see where the snow ends and the earth begins. These cornices have gained enough mass to potentially trigger an avalanche on the slope below. Cornice-fall and cornice-related avalanches account for roughly 5% of our avalanche fatalities. Glide avalanches just under 2%.

Avalanche Problem #3
Gliding Snow
Type
Location
Likelihood
Size
Description

Glide avalanches are challenging to predict, but tend to release during periods of rapidly warming temperatures that both enhance the slow downhill glide rate of the entire snowpack and allow for snow melt to percolate down to the ground interface. They can release without warning anytime - day or night - and produce large, catastrophic avalanches and impressive debris piles. Glide releases are most common in Stairs Gulch, Broads Fork, and Mill B South of Big Cottonwood Canyon...but glide cracks have been noted in other isolated terrain across the range. Click on the 'i' next the to info-graphic for more info.

You can read about the Feb 2013 glide accident in Broads Fork here and the tragic double fatality in Stairs Gulch from April 2001 here.

Additional Information

We'll have mostly sunny skies today with temps warming to near 60 at 8500' and the low 40s at 10,000'. West winds will blow 15mph. A weak disturbance quickly moves through on Thursday, but this is only a pause as ridgetop temps spiral even toward the mid to upper 40s by the weekend. Models do suggest that the ridge weakens with perhaps something moving through Sunday night into Monday.

General Announcements

Remember your information can save lives. If you see anything we should know about, please help us out by submitting snow and avalanche conditions. You can also call us at 801-524-5304, email by clicking HERE, or include #utavy in your tweet or Instagram.

To get help in an emergency (to request a rescue) in the Wasatch, call 911. Be prepared to give your GPS coordinates or the run name. Dispatchers have a copy of the Wasatch Backcountry Ski map.

Backcountry Emergencies. It outlines your step-by-step method in the event of a winter backcountry incident.

If you trigger an avalanche in the backcountry, but no one is hurt and you do not need assistance, please notify the nearest ski area dispatch to avoid a needless response by rescue teams. Thanks.

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DAWN PATROL Hotline updated daily by 5-530am - 888-999-4019 option 8.

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UDOT canyon closures: LINK TO UDOT, or on Twitter, follow @UDOTavy, @CanyonAlerts or @AltaCentral

Utah Avalanche Center mobile app - Get your advisory on your iPhone along with great navigation and rescue tools.

Powderbird Helicopter Skiing - Blog/itinerary for the day

Lost or Found something in the backcountry? - http://nolofo.com/

Ski Utah mobile snow updates

To those skinning uphill at resorts: it is critical to know the resort policy on uphill travel. You can see the uphill travel policy for each resort here.

Benefit the Utah Avalanche Center when you shop from Backcountry.com or REI: Click this link for Backcountry.com or this link to REI, shop, and they will donate a percent of your purchase price to the UAC. Both offer free shipping (with some conditions) so this costs you nothing!

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This information does not apply to developed ski areas or highways where avalanche control is normally done. This advisory is from the U.S.D.A. Forest Service, which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur.