Regional Conditions for Lionhead Range

as of 5:00 am
Apr 300″ | NA
Apr 29 0″ | NA
Apr 28 0″ | NA
8775′     1/29 at 3:00
24 ℉
N - 0 mph
Gusts 0 mph
7750′   07/31 at 9:00
66℉
0″ Depth
Bottom Line: Spring weather can be highly variable and create a mix of avalanche problems to watch out for. Snow conditions and snow stability can change drastically from day to day or hour to hour. Anticipate rapid change and plan accordingly. Plenty of snowfall over the winter with more spring snow to come makes avalanches possible into summer.

Past 5 Days

Mon Apr 19

None
Fri Apr 23

None
Mon Apr 26

None
Fri Apr 30

None
Mon May 3

None

Avalanche Activity- Lionhead Range

Photos- Lionhead Range

Displaying 1 - 40
  • From obs: 5/9/21: "Yesterday we went to check out the new snow in Beehive Basin... Looking down into the face of Peruvian, we observed a natural dry loose slide that released from the ridge... We observed an increase in wind speed throughout the morning, and a shift in wind direction from west to southwest in the early morning moving to west to north west by the late morning. The combination of variable and high winds with the amount of new snow available for transport created a noticeable increase in the hazard of wind slabs on all aspects we observed during the morning..." Photo: E. Schreier

  • From obs: 5/9/21: "Yesterday... While traversing... along the north ridge of 10602 [in Beehive], we triggered a small wind slab  that carried down into Peruvian, which then released another small wind slab on a northeast aspect of the face (photo). The crown height of this wind slab was measured at 60cm at it's deepest point, and approximately 30ft wide by 10ft long. Looking down into the face of Peruvian, we observed a natural dry loose slide that released from the ridge. We observed an increase in wind speed throughout the morning, and a shift in wind direction from west to southwest in the early morning moving to west to north west by the late morning. The combination of variable and high winds with the amount of new snow available for transport created a noticeable increase in the hazard of wind slabs on all aspects we observed during the morning..." Photo: E. Schreier

  • Small wet loose slide that a skier triggered, running over an older crown from prior days. East aspect, 10,000'. From 5/7/21. Photo: D. Britt

  • Photo of a large natural wet avalanche in Taylor Fork, NNW aspect around 9,000' elevation near Koch Peak, on 5/3/21. Photo: D. Britt

  • From email 5/2/21: "Small but plentiful wet snow avalanches in Cooke City today. Didn’t see any that were broke on a deeper scale." Photo: K. Goodyear

  • From obs: "I traversed the Bridger range yesterday (4/28/21). The alpine start was good and solid but I saw lots of recent avalanches that looked super wet, some that had broken a couple feet deep. Conditions were pretty stable until about 1300 when that most recent snow layer started to really want to slide on the crust. Once I was in the meadows between Baldy and the M, at about 1400, I started hearing/feeling really wet "whumps". Photo: J. Harrison

  • From obs: "I traversed the Bridger range yesterday (4/28/21). The alpine start was good and solid but I saw lots of recent avalanches that looked super wet, some that had broken a couple feet deep. Conditions were pretty stable until about 1300 when that most recent snow layer started to really want to slide on the crust. Once I was in the meadows between Baldy and the M, at about 1400, I started hearing/feeling really wet "whumps". Photo: J. Harrison

  • From obs 4/28/21: "Observed numerous natural wet loose slides probably occurring over the past 48 hours on NW-W-S aspects mid-elevation. Point releases from rock bands and couloirs shedding. Photo for example, which shows W facing bowl with slides visible from US-89 in Paradise Valley. These are between 8500’ and 9500’ on an unnamed peak just northeast of Dexter Point." Photo: T. Benson

  • From obs (4/18/21): "...class split and dug three pits, one on NE, one on N, and one on NW at 7623'. HS averaged around 70 - 100 cms... The NE and NW facing pits showed rounding depth hoar and no sudden CT results. None of the ECTs fractured or propagated. The N facing slope still had preserved advanced depth hoar 3 mm in size (see image)..." Photo: J. Quinn

  • From obs 4/9/21: "...we saw widespread natural wind slabs on N-NE eastern slopes in the Northern Absarokas (photo). Winds increased throughout the morning, and evidence of wind transport became more apparent at higher elevations. We found that on aspects unaffected by wind loading, the new snow layer was not cohesive and only saw minor sluffing." Photo: E. Schreier

  • Skiers had a collapse which made this crack on a south facing slope with a shallower, wet snowpack around 9,000' near Cooke City. Photo: J. Redfield

  • This wet slab was reported on 4/4/21 around 8,200' elevation in the Main Boulder drainage south of Big Timber, outside of our advisory area. It happened that day or very recently during extended above freezing temperatures. Photo: G. Smith

  • Extreme winds on 3/28/21 transported snow that fell over the past week into fresh wind slabs. Photo: BSSP

  • From obs 3/28/21: "Saw this slope which frequently slides had been triggered on our way out last night [lower left in photo]. Slid to the ground but I expect it was mostly new snow as there is a larger old crown visible further uphill... I did see two other small pocket slides yesterday also in new snow on bed surfaces of older slides... General snowpack is getting very deep now but a thick junk layer remains at the ground everywhere I dug sleds out." Photo: J. Gerardi

  • From obs: "Deep slab avalanche in Blackmore Basin that appeared to break on the depth hoar near the bottom of the snowpack. It was on a wind loaded NE facing slope at approx. 9,500 and looked to break on a slope in the 35-40 degree range. The crown was about 8'-10' deep and 200' wide. It broke to the ground and ripped out several small trees." Photo: JR Mooney

  • Ian and Dave stop to do a quick stability test as they hunt for a layer of weak snow 1-2 feet under the surface. Photo: GNFAC

  • From obs: "On our way up the summer trail route to Hyalite Peak our party of three remotely triggered a small avalanche from the skin track at around 9,600ft on a east facing aspect. The storm slab went about 4 inches deep and 150-200ft across a small roll over feature. We were about 150ft away when we triggered the slide." Photo: C. Kussmaul

  • The snowpack in the Centennials is remarkably similar to the Lionhead area outside West Yellowstone: 6 feet of snow at 9,200 feet. The stability will get worse with snow this weekend (19-21 March) because the surface snow is week and the new snow will not bond to it (near-surface facets). Photo: GNFAC

  • Cornices along Lionhead Ridge. 3/16/2021

    Photo: GNFAC

  • Seen from near Ennis on 3/4/21. On Finger Mountain in the southern Madison Range. Photo: D. Frohman

  • We saw these recent wet loose avalanches on 3/6/21. SW aspect, 9,100'. They likely ran during above freezing temperatures between 3/3 and 3/5. Photo: GNFAC

  • From obs: "Small D1 avalanche on south-eastern aspect around 7800ft. Looks like solar released on older layer a day or two ago."

    Photo: M. Mailly

  • From obs: "While touring above the canyon this morning, I noticed a very recent wet slide (would guess this incident occurred yesterday afternoon, March 4th). This was a skier triggered slide on a E aspect at an elevation of 7200. This slide was roughly 50 feet wide and ran about 50 feet, I estimated this crown to be 2-3 feet deep, slid all the way to the ground. This occurred below a steep roller."

    Photo: T. Saulnier

  • Wet loose avalanches released in the warm sunshine on Tuesday, March 2nd. We expect many more in the coming days. Photo: S. Jonas

  • Sled Skiing in Third Yellow mule... after an air onto the slope the impact from landing resulted in a fracture and failure to / near the ground... in addition, a remote trigger occurred on adjacent slope... 200-300 ft to the skiers right. No body was caught in either slide. Skier that initiated failure was moving at high speed and was beyond slide path before majority of snow movement began. Photo: W. Miller

  • Sled Skiing in Third Yellow mule... after an air onto the slope the impact from landing resulted in a fracture and failure to / near the ground... in addition, a remote trigger occurred on adjacent slope... 200-300 ft to the skiers right. No body was caught in either slide. Skier that initiated failure was moving at high speed and was beyond slide path before majority of snow movement began. Photo: W. Miller

  • Sled Skiing in Third Yellow mule... after an air onto the slope the impact from landing resulted in a fracture and failure to / near the ground... in addition, a remote trigger occurred on adjacent slope... 200-300 ft to the skiers right. No body was caught in either slide. Photo: W. Miller

  • This avalanche was triggered on Sunday, 2/28, when a skier released another slide 2-300 feet away. It broke at the same time. No one was caught. This was in the Third Yellow Mule on Buck Ridge.  Photo: W. Miller

  • Riders triggered this slide on 2/28/21 near Red Canyon/Cabin Creek, north of West Yellowstone. Nobody caught or injured, but close call.

  • Riders triggered this slide on 2/28/21 near Red Canyon/Cabin Creek, north of West Yellowstone. Nobody caught or injured, but close call.

  • Riders triggered this slide on 2/28/21 near Red Canyon/Cabin Creek, north of West Yellowstone. Nobody caught or injured, but close call.

  • Riders triggered this slide on 2/28/21 near Red Canyon/Cabin Creek, north of West Yellowstone. Nobody caught or injured, but close call.

  • There was 6' of snow off the ridge in the Bridger Range on an east facing slope. The top 2 feet were recent wind drifting that broke clean in our stability test which indicated unstable conditions (ECTP18). We expect similar conditions and instability with wind-loaded slops throughout our forecast area. Photo: GNFAC

  • In the last 24 hours (2/28) 12" of low density powder and 40-50 mph west wind made it easy to trigger wind-drifted snow. Alex kicked these drifts which cracked and moved. We expect similar conditions and instability with wind-loaded slops throughout our forecast area. Photo: GNFAC

  • This natural avalanche occurred on a slope that was wind drifted with cross-slope winds. It was a NE facing slope at 9,000 feet and likely ran over the weekend (2/20). Photo: GNFAC

  • This natural avalanche was likely triggered by a falling cornince in the last day or two. The slope is in the Wilderness and was seen from the boundary. Wind drifted snow is a concern in this area. Photo: GNFAC

  • On 2/13/21 riders reported they triggered this avalanche, and remotely triggered two other slides. Nobody was injured. One partially buried.

  • On 2/13/21 riders reported they triggered this avalanche, and remotely triggered two other slides. Nobody was injured. One partially buried.

  • Snowmobile triggered slide on Lionhead Ridge in Upper Watkins drainage on 2/11/2021.

  • Natural avalanche on Lionhead Ridge in upper Watkins Creek. Likely broke on Sunday 2/7.

    Photo: GNFAC (2/10/2021)

Videos- Lionhead Range

WebCams

Weather Forecast Lionhead Range

Extended Forecast for

10 Miles WNW West Yellowstone MT

  • Today

    Today: A chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm.  Widespread haze before noon. Mostly cloudy, with a high near 69. East southeast wind 14 to 17 mph, with gusts as high as 24 mph.  Chance of precipitation is 70%.

    Showers
    Likely

    High: 69 °F

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms before midnight. Some of the storms could produce gusty winds and heavy rain.  Mostly cloudy, with a low around 54. East wind 8 to 15 mph becoming north northeast after midnight. Winds could gust as high as 21 mph.

    Heavy Rain
    then Mostly
    Cloudy

    Low: 54 °F

  • Sunday

    Sunday: A slight chance of showers, then showers and possibly a thunderstorm after noon. Some of the storms could produce gusty winds and heavy rain.  High near 72. North northeast wind 8 to 14 mph becoming south in the afternoon. Winds could gust as high as 21 mph.  Chance of precipitation is 80%.

    Slight Chance
    Showers then
    Heavy Rain

    High: 72 °F

  • Sunday
    Night

    Sunday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Some of the storms could produce gusty winds and heavy rain.  Mostly cloudy, with a low around 54. South wind 7 to 15 mph, with gusts as high as 21 mph.  Chance of precipitation is 70%.

    Heavy Rain

    Low: 54 °F

  • Monday

    Monday: Showers and possibly a thunderstorm. Some of the storms could produce gusty winds and heavy rain.  High near 66. South southeast wind 6 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.  Chance of precipitation is 90%.

    Heavy Rain

    High: 66 °F

  • Monday
    Night

    Monday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Some of the storms could produce gusty winds and heavy rain.  Mostly cloudy, with a low around 52. West southwest wind 6 to 9 mph becoming north northwest after midnight.  Chance of precipitation is 70%.

    Heavy Rain

    Low: 52 °F

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 69. West wind 5 to 10 mph.  Chance of precipitation is 40%.

    Chance
    Showers then
    Chance
    T-storms

    High: 69 °F

  • Tuesday
    Night

    Tuesday Night: A slight chance of showers and thunderstorms before midnight.  Mostly clear, with a low around 50. West northwest wind 6 to 10 mph becoming northeast after midnight.

    Slight Chance
    T-storms then
    Mostly Clear

    Low: 50 °F

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 72.

    Sunny then
    Chance
    Showers

    High: 72 °F

The Last Word

Thank you to everyone that sent in observations, read the forecasts, took an avalanche class or donated money, time or gear. Our success is directly related to community support and the Forest Service. Have a safe spring and summer!


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