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Forecast for the Logan Area Mountains

Toby Weed
Issued by Toby Weed on
Friday morning, April 9, 2021
Avalanches are unlikely and the danger is LOW in the backcountry. Even so, people might trigger shallow slab avalanches of drifted snow on very steep upper elevation slopes, and loose wet avalanches entraining moist surface snow are possible in steep sunny terrain.
USE NORMAL CAUTION
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Weather and Snow
It's 17°F this morning at the 8400' Tony Grove Snotel, and there is 53"of total snow containing only 62% of normal SWE. Winds from the northwest are blowing around 15 mph, and it's 11°F at the 9700' CSI Logan Peak weather station.
The sun will be out in full force again today, and it looks like fair spring weather will last through the weekend. High temperatures at upper elevations will top out around 36°F today, and a light north breeze will blow across the ridges and veer from the west this afternoon. It will be a clear night tonight, with mountain temperatures dropping into the mid twenties and a southerly breeze. Southwest winds will increase tomorrow afternoon, the sun will be out, and high temperatures will be around 45°F. It'll be clear and sunny, but a bit cooler in the mountains on Sunday. Monday will also be sunny, but more unsettled conditions with snow showers will develop as we head into next week.
The mountains of the Wellsville Mountain Wilderness reflected in the Little Bear River, 3-7-2021.
Recent Avalanches
The excessive heat last weekend caused natural wet avalanche activity to occur on steep slopes in the Logan Zone, including this nice wet avalanche in Drop-in, Drop-out in Lower Logan Canyon.
This natural wet avalanche in Lower Logan Canyon was observed last Sunday on a north facing slope at around 8000' in elevation.
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Avalanche Problem #1
Normal Caution
Type
Location
Likelihood
Size
Description
  1. As the snow surface warms under the high angled spring sun today, wet loose avalanches entraining moist new snow from earlier in the week will be possible. These will entrain moist surface snow, should be both predictable and manageable, but could produce pretty big piles of heavy debris on sustained steep slopes.
  2. Several inches of new snow accumulated on upper elevation slopes earlier in the week, and strong northwesterly winds last night built shallow but hard slabs in lee slope avalanche starting zones and in and around terrain features like gullies, sub-ridges. and cliff bands. It is possible people could trigger avalanches of stiff wind drifted snow on very steep slopes or in extreme terrain at upper elevations.
Additional Information
General Spring Travel Advise:
As daytime temperatures rise, softening the snow, the danger of wet avalanches will increase, so its a good idea to get in the habit of an early start and to plan on heading down before things get too sloppy.
-Watch for trees or other terrain traps below you if you venture onto steep slopes.
-Roller balls, pin-wheels, and natural wet avalanche activity are red flags indicating potential for people to trigger wet avalanches.
-If you start sinking deeply into wet snow, or if the snow you are traveling on becomes unsupportable due to the heat, it's time to leave.
More dust was blown onto the snow surface by strong northwest winds yesterday evening. Dust from previous events is a significant player in the early melt-down this spring.
The dust melted through the shallow new snow already in most mid elevation terrain and the snow surface is rough and mottled.
With all the dust and a snowpack with well below average SWE, Beaver Creek is melting out a few weeks earlier this spring than it did last spring.
General Announcements
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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....HERE. You can also call us at 801-524-5304, email by clicking HERE, or include #utavy in your Instagram, or @UAClogan on Twitter.
We will update this forecast by around 7:30 tomorrow morning.
This forecast is from the USDA Forest Service, which is solely responsible for its content. The forecast describes general avalanche conditions and local variations always occur.
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