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Hi. Aren't you the guy we saw on TV?

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That's me. I'm Craig Moeller. I'm one of the meteorologists here at Channel 13.

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Yeah. We see you on TV all the time.

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You're always telling us about the weather. You tell us when it's going to rain.

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Being on TV is just a small part of my job. A big part is looking at weather maps like these.

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They tell me about the temperature, the air pressure, and the wind direction.

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Wind direction? That's what we're here to talk about.

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You see, we want to be on TV like you.

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We're trying to find the source of the stink that KSNN reported.

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I heard about that. Maybe I can help you. Come on.

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Mr. Moeller, what generates wind?

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We get wind when there are differences in the air pressure.

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Remember, wind blows from high pressure to low pressure.

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Have you ever gone to the beach and maybe blown up a beach ball?

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Yeah.

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Okay. What happens when you blow it up and you don't put the cap back on the ball?

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All the air blows out.

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All the air blows out because the pressure inside the ball is greater than the pressure outside.

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And when the air moves from inside the ball to out, that's basically wind.

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I have a question. Does wind ever change direction?

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It sure does. As a matter of fact, I'm going to show you something right over here.

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This is a weather station, and one of the instruments you see right on top there, that's called an anemometer.

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That's used to measure the strength of the wind, and this up here, this is called a wind vane.

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This measures the direction, and as you can see, it's prepared to change with the wind.

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Let me show you something over on this computer. This is pretty cool.

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This is a weather map. We've got areas of low pressure and high pressure.

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As you look at this map, you'll see the winds around high pressure travel clockwise,

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and around low pressure travel counterclockwise.

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So as we look at that, which way is the wind blowing?

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South.

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From the south, exactly. Now take a look at tomorrow.

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With all of these features moving over to the east a little bit,

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we have the high pressure just to the west, low pressure just to our east.

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Again, counterclockwise around the low, clockwise around the high.

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Which way is the wind blowing?

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North.

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From the north.

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From the north. So as you guys can see, the wind does change direction.

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Mr. Mahler, can wind move smell?

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It sure can. Wind can move a lot of things.

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It can move the smells, it can move water droplets, it can move volcanic ash.

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As a matter of fact, when a tornado spins, it can pick up debris,

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and the wind can move it for hundreds of miles.

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Wow, I didn't know weather was this complicated.

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Here, I'll give you the wind direction for each day this week. That might help you.

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Cool. Let's take these back to Dr. G's lab,

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and we can find the wind direction and track the smell.

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We'll have to study them.

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Aw, man, that sounds like more work, and I thought we were almost there.

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Thanks a lot. This is a really neat place. Maybe we can come back sometime.

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Anytime. I'll see you guys later.

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Watch for us on KSNN.

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I'll be tuning in.

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Bye.

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See you later.

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See ya.