Analysing terrain data
The exposure grade does not take into account objective hazards (stone fall, seracs, etc) but only the consequences of the skier falling.
Low Exposure (E1): Exposure is limited to that of the slope itself. Getting hurt is still likely if the slope is steep and/or the snow is hard.
Medium Exposure (E2): As well as the slope itself, there are some obstacles (such as rock outcrops) which could aggravate injury.
High Exposure (E3): In case of a fall, death is highly likely.
Extreme Exposure (E4): In case of a fall, the skier faces certain death.
This is a expert only couloir.
It is very steep and exposed.
However, it fans out sooner then the other Doors.
There is generally a large cornice over this couloir and may require ropes to access.
It can be a big drop into the line and it starts very steep and exposed with lots of rocks.
If you don't have the skills, don't attempt it.