Thunder

For the aircraft, see P-47 Thunderbolt and A-10 Thunderbolt II.


Thunder is a loud sound that is often heard during a powerful rain storm.
Thunder is so loud it can be heard from a far distance.
It can sound like a boom, a crash, or a rumble.

Thunder is made when lightning strikes.
The energy from the lightning heats up the air so much that it makes a kind of explosion.

When lightning is nearby, thunder will be heard soon after the lightning flash, and the sound will be very loud.  If the lightning is farther away, the thunder will be heard a few seconds or many seconds after the lightning. People can guess how far away the lightning is by counting the number of seconds between the time they see the lightning and hear the thunder.

References

 Related pages 
Thor

Category:Basic English 850 words
Category:Weather
Category:Severe weather