Avalanche Advisory
Advisory: Ogden Area Mountains Issued by Evelyn Lees for Tuesday - December 26, 2017 - 7:35am
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AVALANCHE WARNING - The avalanche danger is HIGH today – backcountry travel in avalanche terrain is not recommended. Natural and human triggered avalanches are likely at the upper and mid elevations on northwest through easterly facing slopes. Avalanches can be triggered remotely from a distance and from below. Avoid travel on and below all steep slopes, including even the smaller, steep gullies, creek beds and road banks at the lower elevations.

Avoid avalanche terrain by heading to slopes less steep about 30 degrees, which are not adjacent to or below steeper terrain, such as meadows and rolling, low angle terrain
avalanche warning

THE FOREST SERVICE UTAH AVALANCHE CENTER IN SALT LAKE CITY HAS CONTINUED THE BACKCOUNTRY AVALANCHE WARNING.

* TIMING…IN EFFECT FROM 6 AM MST THIS MORNING TO 6 AM MST WEDNESDAY MORNING

* AFFECTED AREA…FOR THE MOUNTAINS OF NORTHERN UTAH INCLUDING THE BEAR RIVER RANGE, WESTERN UINTAS, AND ALL THE WASATCH RANGE...THE OGDEN, PROVO, SALT LAKE AND PARK CITY AREA MOUNTAINS.

* AVALANCHE DANGER…THE AVALANCHE DANGER FOR THE WARNING AREA IS HIGH TODAY.

* IMPACTS…RECENT SNOW AND WIND HAS CREATED WIDESPREAD AREAS OF UNSTABLE SNOW. HUMAN TRIGGERED AVALANCHES ARE LIKELY. STAY OFF OF AND OUT FROM UNDER SLOPES STEEPER THAN 30 DEGREES. AVALANCHES CAN BE TRIGGERED REMOTELY FROM A DISTANCE AND FROM BELOW.

THIS WARNING DOES NOT APPLY TO SKI AREAS WHERE AVALANCHE HAZARD REDUCTION MEASURES ARE PERFORMED.
special announcement

We're excited to introduce for the 2017/2018 winter the Utah Avalanche Center podcast, hosted by forecaster Drew Hardesty and produced by KUER's Benjamin Bombard. The podcast will include engaging stories, interviews, and lessons learned - all things avalanche to help keep people on top of the snow instead of buried beneath it - and easily found on iTunes, Stitcher, the UAC blog, or wherever you get your podcasts.
current conditions

It's been a good few days - since December 22 the Ogden area mountains have received 1 ½ to 2 feet of snow, with over 2" of water in places. The mid elevations are starting to develop a more supportable snow pack, though it’s still shallow.

Under partly cloudy skies, temperatures are in the low 20s to low 30s this morning. Winds are from a west to southwest direction, averaging 15 to20 mph, with gusts into the 30s. Many wind sites in the Ogden area mountains are down
recent activity

Yesterday, Ogden resort avalanche work released slides with explosives - both new snow and going to the ground, class 1s and 2s.. If you look around, there is evidence of the December 23rd Ogden avalanche cycle, that included lower elevation slopes. Natural avalanches that ran the 23rd were observed on steep, northerly facing backcountry slopes, between 8,000' and 9500', in addition to slides at the lower elevations.
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

Collapsing, cracking and avalanches. All bulls eye clues that the snow is dangerously unstable. With two storms this week, the avalanche starting zones are now more connected – and slides today will be wider and deeper. There are an alarming number of weak, faceted layers in the snowpack – variable from slope to slope, any of which could fail. These weak faceted layers will be very slow to stabilize, and avoidance is key. Avoid all travel on, below and adjacent to steep slopes facing northwesterly through easterly at the mid and upper elevations. Low elevation, shady slopes also have facets near rhe ground, so identify and avoid terrain traps, such smaller, steep gullies, creek beds and road banks.
Avalanche Problem 2
type aspect/elevation characteristics
LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
over the next 12 hours
description

While more stubborn, wind drifts could still be triggered on steep slopes today – most widespread along or just off ridgelines. Once any snow gets moving, it could step down to one of the deeper weak layers, resulting in a much larger avalanche.
weather

We will be under a dry and mild west to northwest flow through the end of the week. Today, skies will be partly cloudy to sunny. Temperatures will be warm – reaching into the mid to upper 30s today. Winds will mostly be light, from a westerly direction, in the 10 to 20 mph range, though winds across the higest peaks may gust into the 50 to 60 mph range at times
general announcements

FOR MORE GENERAL INFORMATION AND FAQ, CLICK HERE

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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.