According to an estimate around 40000 thunderstorms occur daily all over the world.
For a thunderstorm to occur we need to have moisture, disturbance in atmosphere and a lift generated by pressure difference.
There are three different types of thunderstorms i.e. Ordinary Cell, MultiCell & SuperCell Thunderstorm. The names here are self-explanatory as what each of thunderstorm points to.
And Ultimately, thunderstorms result in hail, bad forced winds,Tornadoes, Heavy Rains.