Trip Planning for Lionhead Range

as of 5:00 am

Today	2″ \| 5-20 W
Dec 8	5″ \| 15-40 W
Dec 7	3″ \| 25-65 SW

Lionhead Wind

9420′ 12/09 at 11:00

9.9℉
W - 16mph
Gusts 21 mph

Madison Plateau SNOTEL

7750′ 12/09 at 11:00

14℉
24″ Depth

Full Forecast

Primary Problem: Persistent Weak Layer

Bottom Line: Unstable snow is widespread across our advisory area. Weak snow at the ground that fell in October and early November has been overloaded by this week’s new snow. Any slope that held snow before last weekend is suspect. If you ride on or beneath steep slopes today, expect to trigger avalanches. Avoid the hazard by sticking to lower angled slopes today and avoiding crossing runout zones beneath steeper slopes.

Past 5 Days

Sun Dec 3

None

Mon Dec 4

None

Thu Dec 7

Considerable

Fri Dec 8

Considerable

Today

Considerable

Relevant Avalanche Activity

2023-12-08

Widespread cracking and collapsing

Coordinates: 45.2952, -111.4100
Caught: 0 ; Buried: 0

Cracking and collapsing reported across the advisory area in the Bridger Range, Big Sky area, near West Yellowstone and Island Park, and near Cooke City.

More Avalanche Details

2023-12-03

Lionhead Range

Lionhead Ridge

Splitboarder triggered avalanche at lionhead

Lionhead Ridge
SS-ARu-R2-D2-O
Elevation: 9,000
Aspect: NE
Coordinates: 44.7145, -111.3180
Caught: 0 ; Buried: 0

Was splitboarding up near lions head ridge today. Made some bad decisions and kicked off a good slide in a NE facing chute. Was with 2 buddies, 1 of which skied the line 3 weeks ago. Underneath about a foot of new powder snow there was a firm crust that seemed like it was old hard windslab in the gut of the chute, and I think a sun crust on the riders left side(East aspect). We had 2 spots where we were planning to re group at, first was a small cubby area right before a slight rollover about 75 ft from the top. I dropped first, made some turns down toward the pulloff, as I pulled in, I triggered a good size slab that propagated maybe 40-50 ft across, at the rollover as I carved into the pulloff. Pulled all snow out of the chute down to the ground. Seemed to have failed on sugary facets on ground/ice crust close to the ground...

More Avalanche Details

Relevant Photos

Displaying 1 - 5

Whumphs at Lionhead

From IG: “Skied in the lions head today on a northeast slope at 8,300 feet. Clear wind loading and reactive cornices, however storm snow was low energy with little movement. 10-14 inches of medium density snow. Whumpfing was noticed on all slopes on the eastern half of the compass.” Photo: O. Desroches
Avalanches at Pine Creek

From IG: “Pine creek today, some small wind slabs and a full depth wet slide off black mountain”
Avalanche at Pine Creek

From IG: “Pine creek today (10/21), some small wind slabs and a full depth wet slide off black mountain”
Avalanche on Mt. Blackmore, hyalite

From obs. "Was out alpine climbing today and observed the north face of Blackmore had slid already."
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