Avalanche Advisory
Advisory: Ogden Area Mountains Issued by Drew Hardesty for Tuesday - November 29, 2016 - 7:15am
bottom line

One must approach steep terrain with the mindset of a CONSIDERABLE danger today. Give the snow some time to adjust as conditions are likely to improve over the next day or so. Longer running sluffs are expected in the cold smoke. You'll find plenty of good and safe riding in the mid-elevation, sheltered terrain even on lower slope angles in the low density snow. If heading into steeper terrain - it's game on: One-at-a-time, have your rescue gear dialed, have good communication, make a plan. It wouldn't surprise me to see a few close calls today.




current conditions

This storm was the real deal. Like days of old...

Skies are overcast with a few more flurries filtering in this morning. The north to northwest winds are generally well-behaved, blowing 10-15mph with occasional gusts to the mid-20s. Temps are in the teens.

Storm totals since Saturday night are impressive:

Ogden mountains: 21"/2.0" - 28"/2.59" with 33" on the ground (at 8000' and 8500')

recent activity

The most significant report was from unskied terrain in the Powder Mountain periphery where heavy machinery triggered a pocket to the ground in the 2-3mm facets from late autumn. It was just over a foot deep and 50' wide on a north facing slope at 8000'. No incident or involvement reported.

Kory Davis has some excellent obs from the backcountry the last two days.

Avalanche Problem 1
type aspect/elevation characteristics
LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
over the next 24 hours
description

While the drifts are slowly stabilizing, new ones are being developed. One may still find some soft drifts cross-loaded beyond the subridges and in the lee of other terrain features. Test slopes, cornice drops, and doing the home-work (ie: digging test pits) will provide some good indication of localized stability.

Cornices will remain sensitive and may calve off on approach. Be wary of ridgelines and don't let the cornice break off behind you. The tumbling boxcar may trigger an avalanche on the slope below.

Avalanche Problem 2
type aspect/elevation characteristics
LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
over the next 24 hours
description

The sensitivity will not be what it was yesterday but the simple fact is that it may take a day or two for the storm snow to settle out and gain strength. 20-30" of storm snow will naturally have a few weak interfaces that may still run with human weight or interaction. The colder temps tend not to aid in the settlement process but the trends are on the upswing toward stabilization. Again, test slopes, test pits, and cornice drops should give some indication of localized stability.

Avalanche Problem 3
type aspect/elevation characteristics
LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
over the next 24 hours
description

Any new snow avalanche in the upper elevation northerly terrain may step down to the weak sugary facets near the ground. The slides will likely be 1-3' deep and a few hundred feet wide and may be unsurvivable. This storm was a good test to see how the basal facets reacted under stress. Your weight will be additional stress today if entering the upper elevation northerly terrain. These may be isolated and pocket with the good news is that all this additional snow may help to stabilize them more quickly over time.

weather

Overcast skies will turn mostly cloudy as we take a quick breather before the next storm on track for Wednesday night into early Friday. Winds will be light to moderate from the north-northwest. Temps will remain in the single digits up high and the the upper teens down low. The next storm moves through and cuts off, diving to the southwest, but should provide perhaps 2-5" in its wake. Perhaps another weak wave for Saturday followed by a continued series of storms on the horizon.

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.

EMAIL ADVISORY If you would like to get the daily advisory by email you will need to subscribe here.‚Äč

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

TWITTER Updates for your mobile phone - DETAILS

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!

Benefit the Utah Avalanche Center when you buy or sell on ebay - set the Utah Avalanche Center as a favorite non-profit in your ebay account here and click on ebay gives when you buy or sell. You can choose to have your seller fees donated to the UAC, which doesn't cost you a penny.

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 exist.