Thunderstorms can produce tornadoes, hail, and lightning.
How do thunderstorms form? First, cumulus clouds form. http://www.freewebs.com/
If enough energy and moisture is available, they grow huge! http://serbian.wunderground.com
http://blog.weatherbug.com What do you see happening in this cloud diagram?
Lightning occurs during thunderstorms. Lightning is very common in Georgia. What causes it?
One region within the cloud builds up a positive charge and the other a negative charge. The bottom of the cloud usually ends up being negatively charged and the top positively charged. If the build up (separation) of charge becomes great enough, the negative charges may leap to the positive.
A lightning strike can heat the air in a fraction of a second. When air is heated that quickly, it expands violently and then contracts, like an explosion that happens in the blink of an eye. It's that explosion of air that creates sound waves, which we hear and call thunder .