The avalanche bulletin provides information on the current snow and avalanche conditions in the area. It is a forecast and describes the general avalanche situation for a region (smooth, gradual transitions) but not for a single slope.
The avalanche hazard is described by the danger level, the prevailing typical avalanche problem and with a plot showing avalanche prone locations.
The danger level depends on:
Probability of avalanche release (natural or human triggered)
Distribution and frequency of dangerous slopes
Number and size of expected avalanches
Avalanche danger in bulletin for Switzerland