Question: How far away is this storm?
I'm having a large storm with thunder and lightning where I live and the thunder at its closest was 1 second after the lightning. I was told as a kid every second after lightning that you hear thunder is one mile but I know now that's not true. Does anyone know how fast sound travel a second roughly so I can figure this out.
About one kilometer in three seconds or one mile in five seconds.
In dry air at 20 °C (68 °F), the speed of sound is 343.2 metres per second (1,126 ft/s). This is 1,236 kilometres per hour (768 mph).