Lightning When hail forms, the ice crystal portion gets very negatively charged. Rain begins when lightning begins. When hail stones hit each other, they knock off electrons. A typical outlet has 110 volts and 20 amps. If bolt strikes nearby, you hear a clap of thunder.
Cars are a safe place to be since rubber tires insulate.
If you're at the base of a t-storm, you can feel the cold downdraft. Ice crystals resist evaporation. Windshear Wind shear alternations of updraft and down draft. Vertical wind shear winds are increasing with height. Hazard to aviation.