Logan Avalanche Advisory

Forecaster: Toby Weed


Danger by aspect and elevation on slopes approaching 35° or steeper.
(click HERE for tomorrow's danger rating)

Danger Rose Tutorial

There is a level 1 or Low danger on most slopes in the backcountry around Logan, and avalanches are generally unlikely. There are, however, still a few pockets with a level 2 or Moderate danger, and heightened avalanche conditions persist in recently drifted terrain where you might trigger stiff wind slabs on very steep exposed slopes. Wet and dry loose snow avalanches are also possible on very steep slopes with saturated surface snow or loose recrystallized powder. These will be manageable for the most part, but could cause a problem on slopes with a long sustained pitch or on those above terrain traps. Use normal caution and continue following safe travel protocols, but evaluate the snow and terrain carefully, especially on very steep slopes in drifted areas or big terrain.


You'll find wind or sun-crusts on many exposed slopes, but nice recrystallized powder stashes are hidden in sheltered shady terrain and can still be found at all elevations. Most of the popular riding areas are fairly well tracked up and you can take your sled almost anywhere you want... We're teaming up with folks from Campbell Scientific and the USU Climate Research Center for an expedition to Logan Peak today in hopes of fixing communications with the weather station at 9700'.... The Tony Grove Snotel at 8400' reports a balmy 27 degrees this morning and no new snow. There's 75 inches of total snow at the site containing 152% of average water for the date.


We've received reports of a few loose wet slides in the Mountains near Provo and Salt Lake City from midday yesterday..

Locally, it's been quiet avalanche-wise, and no new avalanches have been reported for the last week or so... On Wednesday afternoon my partner triggered and was pushed a little ways by a shallow hard wind slab that was pasted on the steep wall of our exit gully. The 2" to 10" deep and around 25' wide hard slab stayed intact and only slid a couple feet before coming to an abrupt stop. The dense, freshly drifted slab had formed on top of weak frost or surface hoar at fairly low elevations, around 6500' in the Southern Wellsvillles....


      Over the next 24 hours.

Mid-week west winds drifted the recrystallized surface snow into lee slope starting zones and deceleration/deposition areas. Stiff, shallow wind slab avalanches are possible in exposed terrain, and in some areas drifts built up on weak surface snow consisting of frost or surface hoar, which was widely reported across the region. Watch for and avoid stiff drifts or wind slabs near ridge lines and in and around terrain features like gullies, cliff-bands, and sub-ridges. You might trigger hard wind slab avalanches up to a foot or so deep on very steep drifted slopes. Slabs are likely to be fairly stubborn and might wait for you to get well out on them before releasing. Be particularly wary above trees or other potential terrain traps like rocks or abrupt benches....


      Over the next 8 hours.

Loose wet avalanches or sluffs are possible on steep slopes where the surface snow becomes saturated. We've had a few reports of natural loose slides in the mountains to our south, and a few of these are also possible in the Logan Area as mountain temperatures climb to around freezing today.... Loose dry sluffs are gradually becoming bigger as the surface snow continues to lose strength in shady terrain... Both wet and dry sluffs are manageable for the most part, but could certainly be a problem if you're hit from above. Make sure no one is below you when you commit to a slope, and be especially wary of steep slopes where you could be washed into a terrain trap like a gully, sink hole, or trees below.


Expect fog and smog in Cache Valley, with slightly warmer conditions and increasing clouds in the mountains today. Temperatures should crest around freezing. Clouds will increase tonight into tomorrow. Expect some snow to fly tomorrow afternoon, and a quick-hitting and cold, but not so moist storm will mix the soup out of the Cache and bring a good chance for a few inches of snow to the mountains late tomorrow night, with potential snowfall lasting through Sunday morning. Another chance for some mountain snowfall will come around the middle part of next week.


You can view a photo summary of last year's avalanche activity in the Logan Area HERE

I will be update this advisory in the mornings on Monday, Wednesday, Friday, and Saturday, and on other days if backcountry avalanche conditions warrant...

Send us your avalanche and snow observations. You can also call me at 435-757-7578, or email to uac@utahavalanchecenter.org

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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.

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.

This advisory provided by the USDA Forest Service, in partnership with:

The Friends of the Utah Avalanche Center, Utah Division of State Parks and Recreation, Utah Division of Emergency Management, Salt Lake County, Salt Lake Unified Fire Authority and the friends of the La Sal Avalanche Center. See our Sponsors Page for a complete list.