tropical storms

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Across
  1. 2. ranks tornadoes according to their destruction and wind speed
  2. 5. the heat required to convert a solid into a liquid or a vapor
  3. 7. a body of air with horizontally uniform temperature
  4. 9. the sound waves that follow after thunder
Down
  1. 1. the channel of partially charged air
  2. 3. a branched channel of positively charged particles
  3. 4. violet downdrafts that are concentrated in a local area
  4. 6. violent, whirling column of air in contact with the ground
  5. 8. extremely powerful storms