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Forecast for the Uintas Area Mountains

Andrew Nassetta
Issued by Andrew Nassetta on
Tuesday morning, December 30, 2025

MODERATE avalanche danger exists on upper elevation slopes with a northerly component where human triggered avalanches are POSSIBLE, breaking up to 4 feet deep and wider than you might expect, failing into faceted snow near the ground.

For today, I am steering clear of avalanche terrain and slopes greater than 30° on the north half of the compass and going for low-angle, protected cold snow where the riding is good.

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Weather and Snow

Nowcast - Another beautiful and chilly morning as things sit inverted with high peak temperatures around 11,000' averaging 25°F while low elevations hover in the teens. Winds blew from the north overnight with a few hours from the northeast, maxing out with gusts around 20 MPH. Another cool night certainly helped to keep the snow surface cool and soft in many areas.

Forecast - Enjoy another round of sunny skies with a high near 30 that will feel even warmer than yesterday. At upper elevations, winds should average 15 MPH blowing from the west, and gust into the low 20's.

Futurecast - We are staying hopeful for a little refresh arriving Wednesday night and bringing at least a few inches. We will keep you in the loop as things materialize.

Travel Conditions - Snow depths range from 2-4' across the Uintas, with generally supportable snow surfaces in most places due to a stout rain crust laid down before Christmas. Warm temperature and sun helped solar slopes develop a heat crust that was a centimeter or two thick by day's end, yesterday. Fortunately, polars are still cold at all elevations and provide 3-4 star riding for both skis, sleds, boards, and anything you like to slide on. Four-wheeled vehicle access to Mirror Lake Highway (HW150) is shut down, while SR-35 (Wolf Creek Pass) remains open.

On the North Slope near Whitney Basin, riding quality has significantly improved, even if your skis never touch the snow!

Low-angle, upper elevation, north facing meadows without any overhead hazard were the ticket yesterday and provided deep and supportable turning.

Recent Avalanches

A few old slides were noted yesterday, but no new avalanches have been triggered or reported within the past 24 hours.

A northeast facing slope at 10,500' on Humpy Peak shoulder, where a natural avalanche occurred on Sunday during a period of intense westerly wind.

Avalanche Problem #1
Persistent Weak Layer
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Description

On Sunday, a solo rider triggered this persistent slab avalanche from below and was caught, carried, but walked away clean -- Check it out, here.

Early season snow turned persistent weak layer now sits 2-4' beneath a supportable, cohesive slab that has proved troubling with recent activity and test results. Much of this weak snow sits beneath a rain crust that formed prior to Christmas, now buried under 1-2' of snow, making the riding and snowpack feel bomber under our sled, skis, or board. That being said, it's not! We are seeing fewer red flags for this avalanche problem, like cracking and collapsing, but it is still possible to trigger. All we need to do is find a shallow spot where we can punch through the slab and impact the weak layer below. See this setup for yourself as the proof is in the powder pudding -- Pull out your shovel or trench your track down and you will surely see the dense, strong slab sitting above weak, old, faceted snow near the ground.

I am paying particular attention to, and avoiding heavily wind-loaded slopes that have a very dense and supportable slab sitting atop the weak layers. Remember, we can trigger today's avalanches remotely or from a distance, meaning we don't have to be directly on the slope to trigger the slide. Persistent slab's are not manageable with ski or side-hill sled cuts, and avoidance is the go-to tool.

Shaun was out in Shingle Mill area yesterday and reported that although its heading in the right direction, our weak and faceted snow is still the main player of our avalanche hazard.

Additional Information

This fleet can't be beat! Huge thanks to Ski-Doo in partnership with Karl Malone's Plaza Cycle, for arranging our sled, loaner program. This vital state-wide partnership gets sleds into the hands of UAC forecasters, allowing us to see more terrain, gather more snowpack information, and issue more accurate avalanche forecasts. Ultimately, this program helps us save lives!

General Announcements

We have some upcoming classes and events that we would be stoked to see you at -- Please reach out with any questions and check out below for more details!

We are always looking for snow and avalanche observations or just general riding conditions. Reach out to us with questions, concerns, or if you see anything in your travels! Contact us directly through the info below:

This forecast is from the U.S.D.A. Forest Service, which is solely responsible for its content. This forecast describes general avalanche conditions, and local variations always occur. This forecast was issued on Tuesday, December 30th at 0500 AM and expires 24 hours after it was issued. We'll update this information by 07:00 AM tomorrow.