The video is being made. Until it arrives, here is what it will say (119 words, about 60 seconds):

Here's Miss Navarro's class on the playground in Dallas one May afternoon. The sky has turned dark gray, and the air is warm and sticky.

Then warm rain pours down, and everyone runs inside.

That same afternoon, a desert town far to the west is hot and dry, and a mountain top is cold.

So where did all that water come from? And why is the weather so different from place to place?

To find out, we will look at what falls from clouds, how the weather differs from a swamp to a desert to a mountain, and what the ocean wind brings to the land.

Okay, so are you ready to find out where our weather comes from?

It ends with a ready line. Then pick a reply below — any reply counts.