Avalanche Advisory
Advisory: Logan Area Mountains Issued by Toby Weed for Friday - April 6, 2018 - 7:08am
bottom line

Rain and wet snow overnight created heightened wet avalanche conditions and MODERATE danger in the backcountry. A moist, warm, and windy storm will continue to impact the zone, causing rising danger of storm snow and wind slab avalanches as we head into the weekend.

  • Human triggered avalanches are possible.
  • Evaluate snow and terrain carefully.
  • Avoid steep slopes with saturated fresh snow, large cornices, and developing drifts.




special announcement

Lift tickets for Snowbasin and Powder Mountain remaining. The tickets are discounted almost 50%. Details and order information here. All proceeds from these go towards paying for avalanche forecasting and education!

current conditions

It's raining in Cache Valley this morning and several inches of snow fell at upper elevations in the Bear River Range overnight, with the rain/snow line around 8500' and temperatures only gradually dropping. A warm, moist, and windy Pacific storm, tapping an "atmospheric river", will impact the Logan Zone this weekend. More snow and rain is expected in the mountains today, and wet, increasingly windy conditions will persist through the weekend. Heightened avalanche conditions exist in the backcountry. Wet activity is possible today, and I expect increasing danger of storm snow and wind slab avalanches as we head into the weekend.

  • The Tony Grove Snotel at 8400' reports 4" of new snow with .5" SWE. It's 33°F, and there is 70" of total snow (82% average SWE).
  • The UDOT weather station at Hwy 89 Logan Summit reports 32°F with 5 to 10 mph northwest wind.


This morning's IR sat. image showing the developing storm with plenty of moisture.

recent activity

Other than expected shallow wind slab activity in the Wellsville Mountain Wilderness with Moday's blow, no other avalanches were reported recently.

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

Loose wet avalanches entraining rain-saturated or moist fresh snow are possible on steep snow-covered slopes at all elevations today.

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

Accumulating snow and drifting from increasing west and southwest winds will create rising danger of storm snow and wind slab avalanches, especially on exposed upper elevation slopes.

weather

A moist, warm, and increasingly windy Pacific storm will impact the Logan Zone this weekend. Several inches of snow is likely at upper elevations, while abundant rain will fall in Cache Valley. Southwest winds will increase significantly in the mountains tomorrow.

  • Today: Snow showers. High near 39. West wind 10 to 16 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 3 to 7 inches possible.
  • Tonight: A chance of snow showers before midnight, then a chance of rain and snow showers. Cloudy, with a low around 33. Southwest wind 7 to 13 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
  • Saturday: Showers. High near 44. Breezy, with a southwest wind 16 to 21 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 100%.
general announcements

Episode 7 of the UAC Podcast "Mastery and False Mastery - An Interview with 'Big' Don Sharaf" is live. With a snow career spanning over 30 years, Don has enough mileage in the mountains to have learned a thing or two, including the profound value of humility when staring into the face of the dragon. Listen in on our conversation about the idea of mastery and if such a thing can exist in the avalanche world. Check it out on ‚Äčthe UAC blog, ITunes, Stitcher, or wherever you get your podcasts.

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.

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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 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.