Science

1. A rotating column of air that starts on the ground and is not associated with a cloud.
6. system that is given a name once its winds reach at least $39~mi/h$.
10. The nickname for the region in the United States most suited for tornado formation.
11. an intense low-pressure system that develops in the tropics with winds of at least $74~mi/h$ ($119~km/h$).
14. The action of leaving a home near the coast or in a flood-prone area to seek safety.
16. Surge A dangerous rise in sea level caused by hurricane winds pushing water toward the coast.
17. The process that releases energy to fuel storms as water vapor turns into liquid clouds.
19. What a hurricane usually does within a few days of moving onto a contine

2. A tropical cyclone with sustained winds of less than $39~mi/h$ ($63~km/h$).
3. A rapidly rotating column of air that reaches the ground from a thunderstorm cloud.
4. Long, narrow lines of thunderstorms that spiral inward toward the center of a hurricane.
5. The phenomenon that causes tropical cyclones to rotate.
7. The scale (often called the EF-scale) used to classify tornadoes based on the damage they cause.
8. A powerful thunderstorm characterized by a single, giant, rotating updraft.
9. A current of rising air that helps form clouds and fuels thunderstorms.
10. The name given to hurricanes that occur in the Western Pacific.
12. The cylinder of thick, whirling clouds and rain that surrounds the hurricane's center.
13. The rotating "heart" or updraft within a supercell thunderstorm.
15. The calm center of a hurricane characterized by very low pressure.
16. The scale used to rank hurricanes into five categories based on their wind speed.
18. A tornado that forms over water instead of land.