Avalanche forecast

Ogden

Issued Apr 22, 2023valid to Apr 23, 2023Utah Avalanche Center

Avalanche danger

Alpine
Treeline
Below treeline

Out of date — this forecast expired 3 years ago. You’re viewing past conditions, not the current bulletin.

Highlights

The avalanche danger is MODERATE at the mid and upper elevations for both New Snow and Wind-Drifted Snow avalanche problems. The danger is LOW at low elevations below about 7,000' where it mostly rained. I am uncertain about cloud cover and whether the sun will come out today. Direct sun or green housing (warm temps from clouds) could instantly spike the avalanche danger, where the 3-6" of new dry snow would become wet and slide easily on the slick underlying surfaces.

Avalanche problems

Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alpine
Treeline
Below treeline
Likelihood
Possible
Size
2
In the past 48 hours, we've seen roughly 3-6 inches of new snow across the mid and upper elevations (rain below about 7,000'). This new snow may or may not bond well to all the slick and frozen surfaces.

Yesterday we found the new snow to be unreactive except in some steep terrain where the new snow would sluff easily, running on the smooth underlying bed surfaces. Today will be a good day to watch those sluffs and be on the lookout for shallow soft slabs. Slope cuts should be an effective tool.
Loose Wet
N
NE
E
SE
S
SW
W
NW
Alpine
Treeline
Below treeline
Likelihood
Possible
Size
2
I don't know if this avalanche problem will come to fruition today. However, it's April and the sun is intense. Any direct sunshine or "green housing" could instantly spike the avalanche danger on any aspect or elevation, allowing the 3-6 inches of new dry snow to become damp, wet, and avalanche. Keep an eye to the sky and watch those snow surfaces to make sure they aren't becoming wet. These loose wet avalanches would be shallow but could run long distances on the old frozen surface below.
Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alpine
Treeline
Below treeline
Likelihood
Possible
Size
2
Shallow, soft slabs of wind-drifted snow will be found at the mid and upper elevations. These wind drifts will mostly be found on aspects facing north through, east and southeast, but you also may discover fresh wind drifts on any aspect at the mid and upper elevations due to cross-loading. Also, watch for sensitive cornices along exposed ridgelines.

With a smooth bed surface, any avalanches may run fast and far.

Photo: Kelly & Meisenheimer observation: Showing the depth (3-6") of the wind slab we found yesterday.

Special Announcement

The last daily forecast will be Sunday, April 23. We will provide intermittent updates with any storm until Sunday, May 7th and will continue posting backcountry observations until then. The UAC is sad to report that a resident was killed by a roof avalanche on Monday, April 17th, in the Town of Brighton. A report is available HERE. Many communities still have a lot of snow on roofs that could produce similar avalanches.

Recent Activity

Snow safety teams reported shallow soft slabs off upper elevation ridgelines. In the backcountry, no new avalanches or observations were reported in the Ogden area yesterday.

Snow and Weather

Snow totals from the past 48 hours are 3-6 inches of new snow (0.26-0.62" water), with some locally-higher amounts reaching 8".

This Morning: Under mostly cloudy skies, the mountain temperatures range from 16-31 °F. Winds remain out of the westerly direction and have slowed, now blowing 10-20 mph across many upper-elevation ridgelines. However, at 11,000', the west-northwest winds are cranking with speeds of 45-50 mph, gusting to 60 mph.

Today: We will remain under a northwest flow with temperatures climbing into the mid to low 30s °F. Clouds should stay over the mountains, and any snowfall this morning will quickly turn into snow showers and broken skies later in the afternoon once the northwest flow decreases and high pressure begins to build in. Winds will remain from the northwest and blow 10-20 mph across many upper elevations. Remember that free air up around 11,000' is blowing much stronger.

Yesterday: we found the best riding and turning conditions on low-angled smooth slopes where the 3-6" of new snow rode like soft velvet and kept you off the bottom. We descended some very steep northerly facing terrain, and it was dust on crust while you dodged frozen roller balls and old tracks. Still fun.

General Announcements

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This information does not apply to developed ski areas or highways where avalanche control is normally done. 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.

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