Posted 7/16/2017 12:23 (#6129241 - in reply to #6129226) Subject: RE: Rain Guage Evaporation
ottertail co mn
Just guessing but I think some of your evaporation re accumulates on the glass side walls like a dew and runs back down?
Also wind would not have the same effect in a tube?
Like I said I am no professional but it's a couple things I would guess upon