| Trigger | Natural | Remote Trigger | No |
| Avalanche Type | Wet Loose Snow | Aspect | South |
| Elevation | 3600ft | Slope Angle | unknown |
| Crown Depth | unknown | Width | unknown |
| Vertical Run | 1500ft |
Avalanche: Summit
Location: Manitoba
Manitoba – scenic route up to the top (3600′)
Avalanche Details
Under partly cloudy skies in the morning, it started as a relatively quiet day for avalanches in our vicinity. Manitoba in particular was protected from the sun midday... until 2:30 PM. Observed 5 wet loose avalanches - D1.5 to 2.5 - in the 30 minutes that followed full sun on the steep southerly slope just north of Manitoba. Additionally, a D2 wet loose slide occurred on a SE aspect of Fresno during this time, running into and filling up a glide crack we had been watching all day. This Fresno slide produced some small crowns as well as it traveled down slope (see picture below). Other areas of the pass that had wet loose activity during the day prior also saw some new similar slides through mid-afternoon, but it appears that - through 4 PM - today's activity was less than yesterdays.
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | No |
| Cracking (Shooting cracks)? | No |
Weather
HOT. 50s at the road, 40s up high. When the sun would hit it made us really sad.
Few clouds, but amazing cloud placement put us in the shade a slight majority of the day.
Above 2000', light north to east winds, gusting moderate. Occasional strong gust at the top.
Snow surface
Wet surface at all aspects and elevations. At the top - 3600' - even northerly aspects had a thin wet layer over several inches of moist snow. To 3000' on West to South aspects, water is seeping into the top 6" of the snowpack, and runnels seem to be forming.
At 2000', on a 25 degree SE aspect, boot penetration as of 3 Pm was knee deep, with the top 12" wet snow. At 1200' - near the Manitoba Hut - even the trail was close to isothermal, with thigh deep boot penetration.
Snowpack
See pit results/surface photos below!
The slide just left of center in this photo was the largest we observed at 2:30 today, on the ridge just north of the Manitoba summit
This wet loose slide on Fresno occurred around 2:30 as well, filling in part of a glide crack that it ran over.
Top 6" of the snowpack on a west aspect at 2600' - the top 4" featured a wet surface and layers of moist, wet, and very wet snow, along with a thin crust at the new/old interface from last week.
Pit structure and results from 3000'.
These loose snow avalanches were seen on a NE aspect of Raven's Ridge, coming from small gullies that included north to east aspects. The debris looked drier and cleaner than slides on south aspects.
Wet loose slides looking up Juneau Creek.
Boot penetration ON THE TRAIL just adjacent to the Manitoba Hut. Not all areas of the trail were this bad... but it's warming fast!