| A | B |
|---|
| air mass | a large body of air that has about the same temperature and humidity |
| front | the line where two air masses meet |
| forecast | a prediction of what the weather will be like |
| meteorologist | a person who studies weather |
| National Weather Service | a government agency that collects information about weather |
| watch | issued by the National Weather Service when the conditions are right for a certain type of weather |
| warning | issued by the National Weather Service when a type of weather has been spotted or is happening |
| flash floods | floods that sometimes happen during hurricanes or heavy thunderstorms |
