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22 Cards in this Set
- Front
- Back
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Air pressure |
the weight of the column of air that extends from the ground (or water's surface) to the top of the atmosphere. Air pressure is also called barometric pressure; it is measured by a barometer. The air pressure is very low in a hurricane. |
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anemometer |
a weather instrument that measures wind speed. |
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Atlantic Ocean |
large body of salt water that separates the Americas from Europe and Africa. It is the second largest ocean. |
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Barometer |
device that measures air pressure. It measures the weight per square inch of the column of air that extends from the instrument to the top of the atmosphere. Falling pressure usually means that a storm is coming. |
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barometric pressure |
weight of the column of air that extends from the ground (or water's surface) to the top of the atmosphere. It is also called air pressure. Air pressure is measured by a barometer. |
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Counterclockwise |
motion goes in a circle in the opposite direction from the way a clock moves. Hurricane winds blow in this motion. |
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Hurricane |
closed, rotating wind. Rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. |
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Eye |
Hurricane winds blow in a spiral around this calm, roughly circular center, which is about 20 - 30 miles wide, it is relatively calm and there is little or no rain. It is the warmest part of the storm. |
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Eyewall |
Surrounding the eye, a band of thunder clouds. Has the most rain and the strongest winds of the storm, gusting up to 225 mph (360 km/h). The smaller the eye, the stronger the winds. |
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Forecast |
prediction of future weather made by meteorologists. |
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Category 1 |
winds are 74-95 MPH |
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Category 2 |
winds are 94-110 MPH |
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Category 3 |
winds are 111- 130 MPH
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Category 4 |
winds are 135- 155 MPH |
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Category 5 |
winds are 156 or more |
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Hurricane season |
June 1 until November 30, when most Atlantic Ocean hurricanes occur. In the eastern Pacific Ocean, hurricane season is from May 15 until November 30. |
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Hurricane Warning |
hurricane is expected in the warning area within 24 hours or less |
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Hurricane Watch |
a hurricane is possible in a given area within 36 hours. |
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Precipitation |
water in all forms that falls from clouds to the earth's surface, including rain, snow, sleet, and hail. |
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Spiral bands |
bands of rain clouds that seem to spiral into the eyewall |
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Tropical Depression |
A hurricane goes through many stages as it develops. As the air pressure drops and there are sustained winds up to 38 miles per hour |
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Tropical Storm |
A hurricane goes through many stages as it develops. When the cyclonic winds have sustained speeds from 39 to 73 miles per hour |
