Avalanche Advisory
Advisory: Provo Area Mountains Issued by Greg Gagne for Friday - March 31, 2017 - 7:29am
bottom line

The avalanche hazard is Moderate at the upper elevations for fresh wind drifts from easterly winds which are forecasted to increase during the afternoon. These drifts may be found in unusual places - such as westerly aspects - but winds may also cross-load any upper elevation aspect.

Outside of wind-affected terrain, the avalanche hazard is mostly Low, but loose snow avalanches are possible on steep upper elevation aspects. Best bet for the best riding today will be upper elevation, wind-sheltered aspects.




special announcement

Thanks for everyone that donated to organizations that make living in Utah a better place during yesterday's Love Utah Give Utah. We here at the Utah Avalanche Center gratefully appreciate the support we receive from this amazing community.

current conditions

Temperatures this morning in the Provo mountains range from upper 20's to low 30's F. Winds are out of the east and are currently light, averaging less than 15 mph. However overnight the east winds gusted into the upper teens for several hours. Total snowfall from late yesterday afternoon is decent, with generally 3-5" reported from the mid elevations in the Provo mountains, with rain reported at lower elevations.

Week in Review [Detailed Version]

This past week has been highlighted by the see-sawing of storm and bluebird days, with avalanche activity ranging from storm and wind slabs during stormy periods, to predictable wet activity on sunny days.

A weak storm on Saturday delivered 4-6" by late in the day in the central Wasatch. Sunday started cool & clear, but the strong March sun brought the usual round of shallow wet loose activity by mid-day.

Monday was a classic March storm, with snow totals ranging from 6-13" during the day. A particular highlight was Alta recording 7" of snow from noon - 1 pm. Jim Steenburgh has a nice write up of this phenomenon on his classic Wasatch Weather Weenies page. During the day Monday there were widespread sensitive storm snow instabilities, including a natural cycle during the height of precipitation intensity.

Tuesday was a transition day with wet slab activity, as well as sensitive wind slabs in the upper alpine regions, reported.

By Wednesday, warm and clear conditions signaled the return to loose wet activity, especially on steep southerly aspects.

Thursday flipped back to unsettled weather as a modest storm entered the region, depositing 5-8" across the Salt Lake and Park City mountains by Friday morning.

recent activity

There were zero reports from the backcountry on Thursday. Where I was traveling yesterday afternoon in the upper reaches of Big and Little Cottonwood canyons in the Salt Lake mountains I was finding the trace to 1" storm snow to bond well to the old snow surface. I ran into a party that was touring in Silver Fork and they reported that, even though they tried, they were unable to get any snow to move.

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

Wild card today are the East winds. Although they are generally light this morning, they are forecasted to increase today, especially by mid to late afternoon. I do not trust east winds, and have been surprised with their associated unusual avalanche activity in the past. Pay attention for fresh wind drifts in unusual places along the upper elevation ridgelines. This includes fresh cornices and wind drifts with a westerly aspect, as well as cross-loading on any upper elevation aspect.

By late afternoon winds may be strong enough to work down into the mid elevations.

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

Outside of wind-affected terrain, rules for normal caution apply:

Loose snow avalanches may be possible on steeper, upper elevation aspects. Although these will be shallow (generally up to 6") and not not break out very wide, the moving snow may be enough to knock you into a tree of over a cliff or rock band.

Wet loose snow avalanches - particularly at lower elevations - are possible.

weather

Cloudy today with ridge top temperatures just below freezing, and warming into the mid and upper 30's F at the mid elevations. Winds will be from the east and will start out light this morning, but increase throughout the day, especially during the afternoon. Rain showers at low elevations, with an outside chance of getting a trace to few inches of snow today at the mid and upper elevations.

We are in a cut-off low that is spinning weather from the east; increasingly strong easterly winds overnight with - at best - a trace of snow forecasted. (If this thing were to only turn the other direction ......)

Unfortunately the models are showing an increasingly weakening system for Monday/Tuesday, which may only bring cooler temperatures.

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.

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 occur