Here in Chennai, India on Oct 27,2005 the rainfall recorded was 423 mm or 16.65 inch (incredible rain)
My Oregon WS recorded around 350 mm or so. This in understandable because of the the velocity of the rain. 300 of the 400 mm can down in like 5 hours.
FYI I have moved on to a Davis V2 now. This has nothing to do the rainfall.