Downbursts- An aviation hazard 
        
            - Downbursts are capable of
                producing strong wind shear - or large changes in wind speed and
                direction over a short distance.
 
            - Responsible for numerous airliner
                crashes over the years.
 
         
        QUESTION FOR 
        THOUGHT: 
        Sinking air warms, yet the downdrafts in a 
        thunderstorm are cold. Why?  | 
         image from WW2010 Online Guides |