have had a similar problem, seems to be that with wind & rain coming from certain directions or angles to the car, the water works in under the passenger side front door. I've seen it once when I hadn't driven the car for a few days. I was able to actually follow the "trail" of water. In 4 years of ownership, it's happened maybe 3 or 4 times, and certainly not to the extent that you've had it. Funny, but I've not been able to duplicate it with a carwash. Hope this helps.
