Weather Software > Cumulus

rainfall offset.

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CW2274:
Wow. Never knew that. No bueno IMO. Thank you.

SnowHiker:

--- Quote from: mcrossley on February 27, 2023, 05:36:34 PM ---OK, if it is using the usual OS rain gauge then I believe it is actually 0.04 inches per tip not 1 mm.

So, the multiplier should be 4.0 exactly.

--- End quote ---

Even the Davis rain gauge is nowhere that accurate.  I believe stations like OS are made to switch between metric and English units with no change in the rain gauge.  As mentioned the difference between 1 mm and .04" is most likely well within specs and the inherent accuracy of the gauge.

So yes, a multiplier of four, or 3.937 really isn't going to make a significant difference.  I would go with the higher, because even assuming it's accurate, it's going to be reporting up to .04" low on any storm to begin with.

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