If they have not moved down to 15 feet yet then they will just move deeper. They like those bridges as you already know and the concrete on the bridge will warm from the sun causing the water to warm so it should be a fish magnet. If you were catching them in 8 feet of water before then they probably would move down to 12 if there is a big drop in water temperature. If the water temp has not dropped much then the big front will slow the bite for a day or two and you will be able to catch them from the same depth you've been catching them after the barometer stabilizes. My two cents. CF
The Original Woodsgoat Hater
2011 NWR Bash Yellow Perch Champion