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Old 4th September 2017 | 14:36
  #15 (permalink)  
BluSdUp
 
Joined: Feb 2013
Posts: 17
Likes: 1
From: 60 north
Rain

A storm drops 100cm of rain over 1000 square km .
No NET water vapor is added or subtracted anywhere else, for arguments sake.:
Pressure must drop, due to mass of atmosphere ( rain ) resting on ground.
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