Severe Weather

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Across
  1. 2. Sudden shaking of ground
  2. 4. Severe snowstorm
  3. 5. Pellets of frozen rain
  4. 6. Whirling column of air and water mist
  5. 9. Mass of snow in swift motion down a mountain
  6. 10. Unplanned fire in a natural area
  7. 13. Spinning clouds with funnel shape
  8. 14. Tornado with narrow rope-like condensation
  9. 16. Deficiency of preciptation
  10. 17. Sudden powerful air current
  11. 18. Movement of mass earth down a slope
Down
  1. 1. Wall of dust blown into an area
  2. 3. Mass of fallen rock
  3. 5. Storm with violent wind
  4. 7. Ocean wave caused by underwater earthquake
  5. 8. Invasion of warm air
  6. 11. Flood caused by rainfall in a short period
  7. 12. When water vapor condenses
  8. 15. Small whirlwind column of dust
  9. 19. Electrical discharge between a cloud and the ground