weather

123456789101112131415161718
Across
  1. 2. this is used to measure air pressure
  2. 6. a tropical storm with winds that have reached a constant speed of 74 miles per hour or more
  3. 11. marks the boundary between two air masses
  4. 14. when a relatively moist, warm air mass slides up and over a cold air mass
  5. 16. the noise heard after a lightning flash due to the expansion of rapidly heated air
  6. 18. a severe snowstorm with high winds and low visibility
Down
  1. 1. when a cold air mass pushes into a warmer air mass
  2. 3. used to assign a tornado a rating
  3. 4. an instrument used to measure temperature
  4. 5. an instrument used to measure wind
  5. 7. a multicolored arc made by light striking water droplets
  6. 8. ice pellets, often mixed with rain or snow
  7. 9. a violently rotating column of air touching the ground, usually attached to the base of a thunderstorm
  8. 10. water vapor frozen into ice crystals and falling in light white flakes
  9. 12. a type of precipitation that falls in visible drops
  10. 13. precipitation that comes down as balls of ice
  11. 15. a sudden light fall of snow, blown in different directions by the wind
  12. 17. a prolonged period of abnormally hot weather