| Trigger | Natural | Remote Trigger | Unknown |
| Avalanche Type | Unknown | Aspect | Southeast |
| Elevation | unknown | Slope Angle | unknown |
| Crown Depth | unknown | Width | unknown |
| Vertical Run | unknown |
Avalanche: Summit
Location: Summit Lake region to Moose Pass
Drove through the Summit Lake and Moose Pass area today before a short tour up to treeline on Colorado Mt – across from Lower Summit Lake. We saw several new wet loose avalanches from the road as well as one slab avalanche that was triggered by a wet loose either today or yesterday.
Avalanche Details
Along with many recent wet loose avalanches, we did see one slab that was triggered by a wet loose. This slab likely was triggered today, but possibly yesterday. This was on a SE aspect around 3,000' on Madson Mtn near Moose Pass. Photo attached.
Several old wind slabs from the NW outflow winds 2-4 days ago were seen. Photos of two of them are below. These had quite wide propagation that is indicative of weak layers underneath.
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | No |
| Cracking (Shooting cracks)? | No |
Observer Comments
Very warm weather, melting of the surface snow, and recent wet loose avalanches on southerly aspects.
Weather
Sunny! A few high clouds here and there.
35-40 degree temps from the parking lot to around 2,000' - high point.
No wind in the area we traveled.
Snow surface
Variable surfaces. Anything facing south either had a sun crust or was still in the melt phase and wet/moist. Many areas have a wind crust or some degree of wind crusts/slabs. We had trouble finding soft snow on our descent in the lower meadows on Colorado.
Snowpack
We dug one quick pit to look at the layers under the surface. The snow depth was around 150cm (4-5') on a easterly aspect at 2,000'.
We found faceted snow of varying degrees of hardness under the top 8" or so of either most snow or wind effected snow. Looking at the wind slabs that were triggered several days ago by the winds, it is clear the facets in the mid or lower portion of the pack are weak.
Recent slab that was triggered by a wet loose on Madson Mt near Moose Pass. Great example of a spingtime slab triggered by a wet loose.
Wind slab on the south end of Butch Mtn at Summit Lake. Unknown time of release
A look at Manitoba from Colorado Mtn across the road.
Older wind slab that occurred during the outflow winds several days ago (March 3-5 ish).
Warming surfaces in the sun on lower Colorado Mtn.... soft midday and hard and crusty after
Former CNFAIC forecaster Heather Thamm geeking out in a quick pit at 2,000' on Colorado.