State of the Snowpack for 2/2/2019 - 2/8/2019

Dates of the Week: 
2/2/2019 to 2/8/2019
Avalanche Problems: 
General Snowpack Structure: 
  • Mid winter snowpack  3 to 5m deep
  • Recent storm snow came in warm to cold and mostly "right side up"
Weather Events: 
  • Feb 2- Feb 5 storm cycle deposited 4 to 6' + of snow in most areas above 7000'
  • Cold below average tempertures
  • Strong to gale force SW winds during storm with moderate post storm NW-NE winds 

Central Sierra Nevada / Lake Tahoe Snowpack, Weather, and Avalanche Observations for California and Nevada from SAC

Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
02/11/2019 - 11:45 Tamarack Peak Mount Rose Area Snowpack Observation Blowing snow along a sub-ridge of Tamarack Peak. The arrow is pointing to a person standing on the ridge. Skier-triggered cracks in a wind-loaded test slope that was undercut. Wind-scoured features along a ridge. Macro ripples (aka tiger stripes) across a slope near the summit of Tamarack. Our skin track refilled quickly with wind loading. Forecaster
02/10/2019 - 14:00 Poison Canyon Bear Valley Area Snowpack Observation Guide
California Ski Guides
02/10/2019 - 14:00 Sagehen Hills Snowpack Observation Public
02/10/2019 - 13:15 Below Poulsen's Peak, Olympic Valley Sawtooth Ridge to Tahoe City Snowpack Observation Guide
Alpenglow Expeditions
02/10/2019 - 12:30 Andesite Ridge Donner Summit Area Snowpack Observation Active wind-loading on Donner Summit Small skier triggered cornice failure causing a loose snow sluff on a test slope. Skin track refilled by wind loading. ECTN on the flank of a natural avalanche that occurred last night. Forecaster
02/10/2019 - 11:30 Cottonwood Hill Sawtooth Ridge to Tahoe City Snowpack Observation ECTN14 @ 45cm down. After 30 taps and no failure, we pulled on the back of the column and it broke cleanly. Public
02/10/2019 - 08:00 Hope Valley & Waterhouse Luther Pass Area (including Job and Freel) Snowpack Observation Public
02/10/2019 - 02:00 Andesite Peak Donner Summit Area Avalanche Observation Forecaster
02/09/2019 - 23:00 Ridge between Forks of Coldstream Creeks Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Public
02/09/2019 - 15:00 Brockway Summit Sawtooth Ridge to Tahoe City Snowpack Observation Small cracking in a very soft slab. The larger cracks we saw later were approximately the same depth. Public
02/09/2019 - 13:15 Round Valley Bear Valley Area Avalanche Observation Guide
California Ski Guides
02/09/2019 - 12:30 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Low vis photo of shooting cracks and small wind slab avalanche, skier triggered Guide
Alpenglow Expeditions
02/09/2019 - 12:00 Carpenter Ridge Independence Lake Area Snowpack Observation Reactive wind slab avalanche intentionally triggered by ski kick.  N aspect, 8600', wind loaded 35 degree slope.  D1 R4, 100' wide x 50' downslope. Other side of wind slab avalanche Avalanche debris down into trees. Skin track refill was almost immediate in near treeline terrain and very fast in below treeline terrain. Shooting cracks up to 20-30' in wind loaded terrain. Storm slab development in below treeline terrain with cracking around skis. Forecaster
02/09/2019 - 12:00 Horse Meadow Luther Pass Area (including Job and Freel) Snowpack Observation Professional Observer
02/09/2019 - 11:30 Incline Peak Mount Rose Area Avalanche Observation Public

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