The Avalanche problems aim to describe typical situations as they occur in avalanche terrain and to support avalanche professionals and recreationists in their evaluation of the avalanche hazard. They complement the danger level and the danger description and may be the most important part of the bulletin.
Very large avalanche caused by the avalanche problem Persistent weak layer. Photo: Torbjørn Lundhaug/regObs
An example of a presentastion of an avalanche problem in our bulletins. Please note that red areas indicate the most exposed terrain.
An avalanche problem, as presented in our bulletins, consists of these factors:
Main avalanche problem (can be more than one)
What type of avalanche is expected?
What are the expect sizes?
What is the expect triggering mechanism?
Distribution of the avalanche problem in the terrain.
Given probability of triggering an avalanche.
We currently use the following avalanche problems in our bulletins. If you are familiar with avalanche problems from other forecasting services, you will easily recognize these.