severe weather

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Across
  1. 4. air rises and forms a cumulus cloud
  2. 7. an intense local storm
  3. 9. tornadoes form between cool, __________ and warm humid air
  4. 10. an electric discharge
  5. 13. destructive rotating column of air with high wind speed
  6. 14. move up and down to build up electrical charge
  7. 16. alley includes Iowa, Kansas, Nebraska and Ohio
  8. 17. tornado forms when a thunderstorm meets horizontal winds at a _______
  9. 18. block warm air from moving up
  10. 19. type of cloud distinctive to a tornado
Down
  1. 1. hurricane that forms over the Indian ocean
  2. 2. a hurricane is a ______________ system
  3. 3. as the funnel reaches the ground, the higher-pressure air rushes into the _____ area
  4. 5. formed in the first stage of thunderstorm
  5. 6. heard after a lightning
  6. 8. huge mass of ocean water pushed by hurricanes
  7. 11. Thunderstorm bring wind, heavy rain, and sometimes _____________
  8. 12. ____________ winds are produced by tornadoes
  9. 15. hurricane that forms over the western Pacific Ocean