tropical storms

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