WEATHER

5. a low pressure,heavy rainstorm that includes lightning as well as thunder and forms from rising warm air and sinking cold air
9. A measure of the amount of pressure being exerted on a location by the atmosphere
11. the gases that surround the earth
13. the movement of air to the right on Earth,caused by Earth's rotation
15. a spinning column of low pressure air that moves in a narrow path over land
16. a weather instrument to measure wind direction
17. the directional winds that usually occur in a region

1. a large rotating storm with very low air pressure that begins over warm ocean waters
2. air pressure associated with rising air, cloudy skies and rainy conditions
3. air pressure associated with falling air,fair skies, and dry conditions
4. a large body of air with relatively uniform characteristics
6. a narrow band of winds greater than57 miles per hour in the upper atmosphere
7. A measure of the amount of water vapor in the air
8. a weather instrument to measure wind speed
10. a weather instrument that measures humidity
12. The boundary between two air masses
14. a weather instrument that measures air pressure