electrical gremlins!!..help please

i have a 95 galant, yesterday on the highway in the POURING beyond POURING rain my car suddenly shut off.....it wouldnt crank back over and seemed a little weak. i got a jump and drove to a freinds house where i kept it running in his dirveway...untill it died again....THEN again got a jump and drove home where it died right outside my house...now today it starts right up and i left it running for over a half hour now and it doesnt show any signs of problems...did i get something wet for the time being? or whats up...thanks for the help

EDIT:

it just died again...im guessing the alt is gone since my radio,lights,power locks,and everything else besides the engine works