Storm chasing is broadly defined as the pursuit of any severe weather condition, regardless of motive, whichcan be curiosity, adventure, scientific exploration, or for news professions/media coverage.[1]
A person who chases storms is known as a storm chaser, or simply a chaser. While witnessing a tornado is the single biggest objective for most chasers, many chase thunderstorms and delight in seeing cumulonimbus cloud structure, watching a barrage of hail and lightning, and seeing what skyscapes unfold. There are also a smaller number of storm chasers who chase
يمكن النظر الى الصورة فى هذا الرابط
http://upload.wikimedia.org/wikipedi...hasse_NSSL.png