Why did the Cullens need the thunder to play baseball, in the movie?

The Cullens needed the thunders while playing baseball because when they kick the ball with the bat it sounds very loud, so when they kick it with thunders, the sound can be disimulated by the sound of thunders. (They have to disimulate it because imagine having those sounds(being human) and don't see thunders that make that sound, it would be very suspicious).

That's why Bella says that now she understood why they needed the thunders just after Rosalie kicked, because it sounded as a thunder.
And also remember when Edward and Emmett shock in the air, it sounded also very hard...as thunders!

:) Hope you understood now...as Bella did!

Because Vampires are powerful when a strong baseball player hits a ball in the MLB sometimes it can make a loud crack just imagine the power of a vampire hitting the ball it would sound like thunder.

cause it was so loud when they hit the ball it would be so loud someone would get suchpichouse

The cullens need thunder, so when the thunder goes off and hit the ball humans can hear it and the power that cames with it so that is why they need thunder to play baseball.

because the vampires hit the ball so hard it's as loud as thunder.

so if they played without the thunder the humans would suspect something and come to see what the noise was.

so they need to play in the thunder storm so that the humans don't come and see them.

it was beacause the cullens hits were so loud that it sounded like thunder to the people living near by and so the people didnt get alarmed they did it during a thunder storm.

When each of the Cullens go up to bat, the sound is so loud the thunder hides the noise they make:]