Severe weather

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Across
  1. 2. A scale used to measure the intensity of tornadoes
  2. 4. A violent storm with strong winds and heavy rain, often accompanied by thunder and lightning
  3. 10. A rotating column of air that forms over land
  4. 13. A type of cloud associated with thunderstorms
  5. 14. A large mass of snow and ice that moves down a mountain slope
  6. 15. A sudden and intense flood causued by heavy rain
  7. 16. The scientific study of weather and atmospheric conditions
  8. 17. A weather phenomenon involving a wall of wind and rain
  9. 18. The phenomenon that causes a sudden increase in temperature due to strong winds
Down
  1. 1. The phenomenon when lightning strikes
  2. 3. The term for a temperature increase that occurs during a heat wave
  3. 5. A massive storm system that forms over warm ocean waters
  4. 6. The area of calm in the center of a hurricane
  5. 7. strong dry wind that occurs in the western U.S.
  6. 8. A type of severe weather characterized by small, frozen rain balls
  7. 9. The process by which warm air rises and cool air sinks
  8. 10. A storm that forms over the ocean, with high winds and heavy rain
  9. 11. A storm with high winds, heavy rain, and snow
  10. 12. A strong warm wind that blows from the desert
  11. 13. A large rotating storm system that occurs in the tropics