[kenny99]

Hello all,
I was driving my '99 Box home from work today, an after a typical Cleveland rain, I heard a sloshing noise coming from underneath the cabin on the passenger side.
When I got home, I noticed the floor was wet by the passenger door. The windows had been up all day, and there was no evident moisture on the window or door panel.
Does anyone know what might have caused this? I've already got quite an extensive repair list going, and I'm hoping this might be an obvious fix.

Thanks,
kenny