Avalanche Advisory
Advisory: Logan Area Mountains Issued by Toby Weed for Wednesday - February 7, 2018 - 6:46am
bottom line

The snow is stable in most areas and avalanches are generally unlikely. Even so, you might trigger cornice falls and/or shallow wind slab avalanches on drifted slopes at upper elevations, and avalanches stepping into old snow remain possible in isolated steep terrain with poor snow structure.

  • Use normal caution, but also a heightened degree of situational awareness.
  • Continue to practice good communication and backcountry travel protocols.
    I will update this advisory on Friday, 2/9/18



special announcement

The CROWBAR backcountry ski race is this Saturday February 10 at Swan Peak/Garden City Canyon. More info and registration at http://CrowbarSkiRace.org.
current conditions

The Tony Grove Snotel at 8400' reports 24°F, and there's 57 inches of total snow at the site containing 89% of normal SWE (or Snow Water Equivalent). It's 26°F at the UDOT Hwy 89 Logan Summit sheds, and a west-northwest wind is blowing 15 to 20 mph this morning. Unseasonably warm temperatures and rain in the last week have really done a number on our low elevation snow. Many slopes have burned off, and trails turned to mud and ice. Nice fast and smooth graupel and shallow powder riding conditions exist at upper elevations, but the shallowly buried rain crusts are a bit catchy and can throw you around a bit.
recent activity

Other than some natural cornice fall and wind slab activity last week at upper elevations, no avalanches were reported recently in the Logan Zone.
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

The snow is stable in most areas and human triggered avalanches are unlikely. Even so, shallow wind slab avalanches and cornice falls are possible in drifted upper elevation terrain, and warmth could cause an increase in wet avalanche danger on some sunny and/or mid-elevation slopes in the next couple days.

  • Watch for and avoid drifted snow on steep lee slopes and in and around terrain features like sub-ridges, gullies, scoops, and rock outcrops.
  • Avoid travel on or under large ridge top cornices, which might break further back than expected and could trigger wind slab avalanches on drifted slopes below.
  • A return to unseasonable warming and periods of sun in the next couple days could cause an increase in wet avalanche danger. If the snow becomes soft and saturated, it's time to move off and out from under steep slopes.
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

Although unlikely, persistent slab avalanches remain possible in isolated steep terrain. Outlying shady slopes with shallow and weak snow are the most suspect.

  • Widespread buried faceted layers appear dormant now, and persistent slab avalanches are unlikely, but if you trigger one it could be dangerous.
  • Pay attention to possible signs of instability like cracking and whumpfing or collapsing, but remember these signs aren't always present when avalanches are triggered, so you have to dig down into the snow to find poor snow structure.
  • Continue to avoid very steep rocky slopes at upper elevations with shallow, weak snow.
weather

Northwest flow aloft will continue across the Great Basin through the week, with a warming trend through Friday. A disturbance in the northwest flow will cross the area this weekend.

  • Today: Mostly cloudy, with a high near 33. West wind 17 to 21 mph.
  • Tonight: Mostly cloudy, with a low around 26. Southwest wind around 18 mph.
  • Thursday: Mostly sunny, with a high near 39. West wind 14 to 18 mph.
general announcements

We have discount lift tickets for Alta, Snowbird, Brighton, Solitude, Snowbasin,and Beaver Mountain. Details and order information here. All proceeds from these go towards paying for avalanche forecasting and education!

The latest UAC podcast - "Recreating Like a Pro - A Conversation with IFMGA guide Anna Keeling" is live. This podcast will be ideal for anyone looking to pick up some tips and tricks from a professional mountain guide for recreating in the winter backcountry environment.​

The UAC Marketplace is online. The holiday auction is closed, but our online marketplace still has deals on skis, packs, airbag packs, beacons, snowshoes, soft goods and much more.

The UAC has new support programs with Outdoor Research and Darn Tough. Support the UAC through your daily shopping. When you shop at Smith's, or online at Outdoor Research, REI, Backcountry.com, Darn Tough, Patagonia, NRS, Amazon, eBay a portion of your purchase will be donated to the FUAC. See our Donate Page for more details on how you can support the UAC when you shop.

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 Check it out on ITunes, Stitcher, the UAC blog, or wherever you get your podcasts.

Now is a great time to practice companion rescue techniques with your backcountry partners. Here's our rescue practice video.

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

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

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.