(Above) Mid Southeast Animated Radar

Hail = Ice Balls of Various Sizes and make up. The size of hail is always determined by the strength of the up draft and height of the parent cloud.  The up draft must be strong enough to support the weight of the ice and when the up draft can no longer support the weight of the ice, the ice falls to the ground and we call it hail. Another aspect that helps create a large hail stone is the up draft pushing upwards drops of rain up where it freezes and falls, caught by the up draft and push upwardsagain and this process continues until the updraft cannot support the weight of the ice.  If you see a stone the size of a golf ball or soft ball, you can be assured that winds loft are very strong and there will be severe weather on the ground.
MESO = Cloud Rotation. The rotation in the cloud is usually horizontal. As the rotation strengthens, the horizontal rotation begins to extend itself to a vertical rotation and depending on other factors, the super cell can drop the rotation as a tornado.  The doppler radar sees the rotation as winds moving in one direction and immediately there is wind moving in the opposite direction.  These two winds moving in opposite directions begins rotation.

TVS = Tornado Vortex Signature (Doppler Radar sees a Hooked Image). At this time, the Peachtree City, Georgia, National Weather Service or other NWS facilities, will issue a tornado warning based on factors they see on radar and ground reports.  NWS also requests the public to phone in a report of any sighting of a Vortex touching the ground or hail the size of a quarter or larger.