MOUNTAIN WEATHER

Prepared: Dr. Ahmet KILIÇ

AVALANCHE TYPES

 

HEADINGS

 

 

 

 

Loose Snow Avalanche / Sluff

It generally occurs at the surface in new snow or wet spring snow. This type of avalanche often begins at a point and spreads out as it goes. Winter re-creationists from this type of avalanche is from being pushed over a cliff or rock band.

 

 

 

Icefall Avalanches

They occur when a glacier encounters a steep drop. The best way to avoid these avalanches is to not travel beneath ice cliffs and through ice falls, or if necessary, roll the dice and travel through quickly.

 

 

 

 

 

 

Roof Avalanches

They can be deadly for the unwary and will often release as the inside of the house or cabin warms up.

 

 
 
 
 
Cornice Fall Avalanches

They occur when cornices break loose from the lee side of ridges

 

 

 

Slab Avalanche

It is the most dangerous type of avalanche .The slab is difficult to see and avoid and will often allow. Around 75% of all avalanche incidents involving skiers are due to slab avalanches. The most common cause is wind; snow is carried over ridges and dropped on lee slopes, building a thick, unstable layer of dense snow, called wind slab.

 

 

 

 

Powder Avalanche

It generally starts from a single point, growing as they progress. Ever-increasing volumes of powder snow are thrown into the air, flowing down the slope as a dense

 

 

Wet Snow Avalanches

In spring, or whenever it is subjected to elevated temperatures, snow transforms rapidly. As a result its cohesion and strength is reduced; wet snow avalanches frequently result.