I have a 1987 Catalina 30 and for as long as I've had the boat (~ 20 years) it's been as dry as a bone. I recently replaced the teak railwood pieces that run along either side of the main hatch top. I put an ample amount of silicone sealant under the wood when I put them back on. It was a nice, clean, beautiful job, or so I thought. We had a rain storm recently and when I checked the boat the interior had taken on a bunch of water. Some of my seat cushions and the carpet were soaked (fresh water). Apparently the deck pocket where the hatch slides in had filled up with water and overflowed down into the interior. The ceiling liner doesn't appear to have any leaks. All I can think is that somehow I clogged up an invisible drain when I sealed the area under the railwood. The hatch rail slides appear to tip a few degrees downhill going forward. I recently took a turkey baster and sucked about 3 gallons of water out of the hatch pocket. That will work until it rains again. Does anyone have any ideas on what I did wrong, or how to fix this?