weather crossword

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Across
  1. 6. An instrument that measures wind speed
  2. 7. High clouds
  3. 8. Issued when severe weather has already developed
  4. 11. Historical record of weather events
  5. 13. The standard scale used to measure temperature
  6. 15. The process of gas changing to liquid
  7. 16. The process of a liquid changing to a vapor or gas
  8. 17. An electrical discharge from a thunderstorm
  9. 18. The sound wave produced as lightning heats the air
  10. 19. A cloud in the shape of individual detached domes
  11. 20. The study of the atmosphere
  12. 21. The amount of water vapor in the atmosphere
  13. 22. When the temperature is expected to be 32 or below
  14. 23. The formation of thin ice crystals on the ground
  15. 25. Flat low level clouds
  16. 27. The mass of air surrounding the earth
Down
  1. 1. Precipitation of small balls of ice
  2. 2. An instrument for measuring atmospheric pressure
  3. 3. An instrument used to measure humidity
  4. 4. Precipitation of liquid water particles
  5. 5. A measure of warmth or coldness
  6. 9. The attraction of two masses to one another
  7. 10. The transfer of heat between bodies in contact
  8. 12. Area in which severe weather might occur
  9. 13. Water droplets suspended in air causing reduced visibility
  10. 14. The absence of motion in the air
  11. 24. A violent rotating column of air
  12. 26. Moisture that has condensed on objects near the ground