Why not use automatic rain gauges that come with many electronic home weather stations?
It goes back to the consistency aspect of collecting data. Not all rain gauges are created equal nor do they all report the same. The majority of automated rain gauges, when summed over several months or years, report less precipitation than actually fell, and sometimes by a significant amount — sometimes 25% or more. Also, most automatic gauges cannot collect snow. Because of these test results, CoCoRaHS asks the observers to set up a CoCoRaHS 4″ gauge along with their automated gauge and see for themselves. Many observers have converted to using the 4″ gauge as their daily measurement when they see the results, and then use their automated gauge as a backup when they are gone. CoCoRaHS provides instruction on how and where to set up your equipment as well as how to read and report your observations. You will also be able to see a map of CoCoRaHS observations for your region in “real time.” Become a part of CoCoraHS!
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