> fog under the Golden Gate Bridge, California Eeee-rump! Eeee-rump! The growly sound of a foghorn echoes in the night. A thick, gray fog creeps in from the ocean and settles over the waterfront....
Squeezing water from air
Water is almost always in the air around you, even when you can't see it or feel it. Here is an experiment that will show you how clouds form when cold air and warm air come together. You'll need: a...
Shapes in the sky
stratus clouds There are many different kinds of clouds, and each kind has a name. Most clouds are named for their shapes. The clouds that look like great sheets pulled across the sky are called...
Floating water in the air
Clouds. Sometimes they look like big gobs of whipped cream in the sky, and sometimes like soft, floating feathers. Sometimes they're white as milk, and sometimes as dark and gloomy as an angry frown....
Dust devils and dust storms
A tornado is a whirling wind that comes down from the sky and touches the ground. Dust devils and sand pillars are whirling winds that go from the ground up into the sky. Whenever hot air rises, it...
The storm with an eye
A hurricane is a storm that's shaped like a doughnut. It's a great, whirling circle of clouds, hundreds of miles (kilometers) wide. In the middle is a hole where the ahis perfectly calm. This hole...
Whirlwinds!
It is late afternoon in the summer. The air is hot and sticky. In the distance, a long line of clouds is gathering. There is a rumble of thunder. The line of dark clouds comes swirling over the...
Measuring wind speed
Weather forecasters, aviators, sailors, and some other people often need to know exactly how hard the wind is blowing. To find out, they use an instrument called an anemometer (an uh MAHM uh tuhr)....
How hard is the wind blowing?
A gentle breeze ruffles your hair. A strong breeze may turn your umbrella inside out. On these pages you will find out how to tell how hard the wind is blowing by watching what it does. And you will...
The moving air
When the air seems calm, and you can't feel a wind, it doesn't mean that the wind has stopped blowing everywhere. For there isn't just one wind, there are many. In one place, there may be a soft...
