what do these mean

[radar01]

Hi

 

Im new to the forum and learning alot from other posts and the guides, I have very little knowledge about the weather but im trying to learn.  Can some explain what these are please, and how I might use them. 

 

wet bulb zero geopotential height

 

freezing level geopotential height

 

 

Many Thanks in advance

Edited December 19, 2014 by radar01