| A | B |
|---|
| air mass | a huge body of air that has similar temperature,pressure, and humidity throughout |
| anticyclone | a high-pressure center of dry air |
| continental | a dry air mass that forms over land |
| cyclone | a swirling center of low pressure |
| El Nino | an event that occurs every 2 to 7 years in the Pacific Ocean, causing changes in winds,currants, and weather patterns that can cause dramatic climate changes |
| flash flood | a sudden, violent flood that occurs within a few hours, or even minutes, of a heavy flood |
| front | the area where air masses meet and do not mix |
| hurricane | a tropical storm that has winds of 119 kilometers per hour or higher;typically about 600 kilometers across |
| isobars | lines on a map joining places that have the same air pressure |
| isotherms | lines on a map joining places that have the same temperature |
| lightning | a sudden spark, or energy discharge, caused when electrical charges jump between parts of a cloud or between a cloud and the ground |
| meteorologist | scientists who study the causes of weather and try to predict it |
| evacuate | to move away temperarily |
| maritime | a humid air mass that forms over oceans |
| occluded | cut off, as the warm air mass at an occluded front is cut off from the ground by cooler air beneath it |
| polar | a cold air mass that forms that forms 50 degrees north latitude or south of 50 degrees south latitude and has high pressure |
| storm | a violent disturbance in the atmosphere |
| storm surge | a dome of water that sweeps across the coast where a hurricane lands |
| tropical | a warm air mass that forms in the tropics and has low air pressure |
| tornado | a rapidly whirling, funnel-shaped cloud that reaches down from a storm cloud to touch Earth's surface, usually leaving a destructive path |
