BayWindow Dripping water from inside
I noticed that the Baywindow in my Living room is dripping water from inside top where the wood frame meets the wall.
I took a picture and uploaded here.http://photos.gardenweb.com/home/galleries/2009/01/baywindow_waterdrip.html
I live in Boston and we had many snow storms this season.
There is lot of snow on the roof.But I noticed the water drips only when the temperatures rise and the snow is melting. I have another bay window in the den that does not have this problem nor does any other windows in the house. What could have gone wrong. ? The roof is in pretty good shape...not too old.
Any hints or suggestions will be much appreciated.
Thanks in advance