ASTRONOMY

4. A boundary between two air masses with different temperatures and moisture levels.
6. The amount of water vapor in the air.
9. Associated with clouds, wind, and precipitation.
11. A large, rotating storm system that forms over warm ocean water.
12. A measure of how hot or cold the air is.

1. A line on a weather map that connects areas with the same air pressure
2. a violent disturbance in the atmosphere
3. A storm with thunder, lightning, heavy rain, and sometimes hail.
5. The condition of the atmosphere at a specific time and place (includes temperature, humidity, wind, etc.).
7. The average weather conditions of an area over a long period of time.
8. A snowstorm with strong winds and low visibility.
10. A rotating column of air extending from a storm cloud to the ground
11. Brings fair, clear weather.