Forecast for the Logan Area Mountains

Toby Weed
Issued by Toby Weed for
Friday, January 11, 2013

There is a MODERATE (or level 2) danger in the backcountry today. Heightened avalanche conditions exist in drifted terrain, and you could trigger wind slab avalanches on steep slopes. Evaluate the snow and terrain carefully, avoid steep drifted slopes, and continue to practice safe travel protocols...

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Learn how to read the forecast here
Special Announcements

The friends of the Utah Avalanche Center in Logan is presenting a snowmobile avalanche safety clinic in Logan, with a classroom session on Thursday.January 17 and a field session up at Tony Grove on Saturday January 19. Save the date, call 435-757-2794 for more information, and visit our website to register..... HERE

Weather and Snow

Looks like more fresh snow down low and in the southern part of the zone, with Powder Mt. reporting a foot of new snow and only an inch at Beaver. Barely enough snow to cover the creme-brulee rime/rain-crust in the Central Bear River Range, but at least we'll get a bit of a break from the smog. The light new snow won't be enough to change the avalanche danger much, but riding conditions will be improved, especially in the southern Bear River Range.

The Tony Grove Snotel at 8400' reports 2 inches of new snow in the past 24 hours. It's 7 degrees this morning, there is 45 inches of total snow, and the station reports 72% of average water content for the date. The CSI Logan Peak weather station at 9700' reports 1 degree below zero, and west-northwest winds averaging in the lower teens..

Recent Avalanches

A rider triggered a small avalanche (most likely of the loose wet variety) as he descended a steep slope on the north side of Providence Canyon on Wednesday afternoon.. He lost control of the sled and it flipped over a few times, ending up buried to the handlebars in a ravine. The uninjured rider was partially buried and managed to self extricate. His partner descended into the ravine to help. The steep gully they were in bottomed out into the cliffs above the Providence Canyon quarry, and the pair could not get their sleds up and out. They were trapped by the terrain and became exhausted after digging out the mostly buried sled and attempting their escape. Luckily they had cell phone reception and they called some friends to come help. After a long evening on the mountain, the posse managed to get the sleds out of the trap and they rode out of the canyon in the middle of the night .

We noticed evidence of a few natural loose wet avalanches from Wednesday (1-9) in lower Providence Canyon, and other than a few loose dry sluffs, no other avalanches were observed or reported locally in the new year...

Here's a link to our avalanche list...

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Avalanche Problem #1
Persistent Weak Layer
Type
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Likelihood
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Description

Watch out for shallow fresh wind slabs on the lee side of major ridges and in and around terrain features like cliff bands, sub-ridges, gullies, and scoops. Drifts formed on weak sugary faceted surface snow, in many areas capped by a rain or rime crust from Tuesday. These wind slabs will be deeper and wider in areas that picked up more snow overnight, like in the southern part of the zone. Avoid wind drifts on steep slopes. These often appear smooth or rounded and chalky looking, and they sometimes sound rather hollow. Cracking in drifted snow is a red flag requiring reevaluation of your route. Fresh wind slabs will continue to develop today, with some snowfall, west wind, and continued drifting expected.

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Additional Information

The National Weather Service has continued a Winter Storm Warning for all the mountains of Utah through Saturday. Expect snow today, heavy at times, high temperatures of around 15 degrees at 8500', and continuing west winds with average wind speeds in the upper teens along the ridges. 2 to 4 inches is forecast today for the Central Bear River Range. More snow is expected tonight (1 to 3 inches forecast), west winds will continue and mountain temperatures will drop to a couple degrees below zero. It will be quite cold on Saturday, with a north breeze, clouds, a few additional snowflakes and high temperatures only near 5 degrees. A very cold northwest flow will continue through the weekend and persist into next week...

Check out the Logan Mountain Weather page...

General Announcements

Remember your information from the backcountry can save lives. If you see or trigger an avalanche in the backcountry or see anything else we should know about, please send us your snow and avalanche observations. You can also call us at 801-524-5304 or email by clicking HERE. In the Logan Area you can contact Toby Weed directly at 435-757-7578.

I will update this advisory on Monday, Wednesday, Friday, and Saturday mornings by around 7:30...

This advisory is produced by the U.S.D.A. Forest Service, which is solely responsible for its content. It describes only general avalanche conditions and local variations always exist.