Avalanche Forecast
Avalanche Bulletin - Glacier National Park
The new snow needs time to become less reactive.
If triggered, avalanches could run to valley bottom today.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Minimize overhead exposure during periods of heavy loading from new snow, wind.
- The new snow will require several days to settle and stabilize.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
The Halloween Crust layer is buried down approximately 100cms. With the recent loading from heavy snow and strong winds we could see this layer become reactive. If it does "wake up" the resulting avalanches would be large!
Travel and Terrain Advice
- Minimize exposure during periods of heavy loading from new snow and wind.
Avalanche Summary
In the Highway corridor this morning forecasters observed fresh debris to size 2.5 that ran into avalanche path runouts. There was also a report of a size 3 avalanche off of the East aspect of Grizzly Peak in the Connaught drainage. This increase in avalanche activity can be attributed to recent snow loading and strong winds in the alpine.
Snowpack Summary
Another 25cms fell overnight in the Alpine. Thats an average of 20cms's a day for the last 5 days. This recent snow with moderate South winds has built widespread storm slabs. The Halloween crust is the layer we're watching and it's down approx 80-100cm. The snowpack is still very thin below 1700m
Weather Forecast
Today will be a lull in the stormy weather we've been seeing. Expect a mix of sun and cloud, with no snow forecasted and freezing levels around 1500m. Wind will be light from the south. A significant storm will affect Roger's Pass Tuesday-Thursday bringing heavy precip and very high freezing levels, up to 2800m on Wednesday!
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Heavy snow loading and strong alpine winds have created a reactive storm slab. Yesterday shooting cracks were observed in the alpine. The storm slab will be most reactive in unsupported terrain and features exposed to wind loading.