Weather - Forecasting the weather

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Across
  1. 5. Flat bottom - round top cloud
  2. 6. Precipitation instrument
  3. 7. Pressure - sunny, hot, clear sky
  4. 8. Thick, Grey , fill the sky
  5. 9. Rain, wind, stormy weather
  6. 12. Atmospheric pressure instrument
  7. 13. The speed or strength of wind is measured using an?
  8. 14. weight pushing down the earth
  9. 16. Lines of atmospheric pressure on map
  10. 17. Measurement unit of precipitation
  11. 19. The amount of water vapour in the air
  12. 20. A weather station
  13. 21. used to indicate the direction of wind
Down
  1. 1. Atmospheric pressure unit
  2. 2. Measurement of Humidity
  3. 3. Instrument for temperature
  4. 4. Measurement of temperature
  5. 10. The state of the atmosphere at any given time
  6. 11. stokes measures the hours of sunshine in a day
  7. 15. Another word for rain
  8. 18. thin and wispy clouds