Front passenger footwell flooded

[squeasel]

The drought is over and now the weather stripping testing has begun. The passenger (right) front footwell is soaking wet. The car was driven a couple of miles in the rain, then parked 8 hours outside, then driven home. It seems like it is leaking when parked. The wet portion is only the horizontal part. There seems to be no water coming from the dash or down the sloped part of the footwell Any thoughts where I should begin to search? Or is this a common enough problem that someone can say "just replace the bottom door seal". Much thanks in advance.