I wouldn't know, but I understand it can get chilly up there in Buffalo!. I would consult with a good local contractor to find out about local practices concerning pipes in oustside wall.
Regarding the electric panel below, I do not believe there are any restrictions in either the Uniform Building Code or the NEC about this. However, your local building codes may require the washing machine to be in a pan with an approved drain. Code or not, this is very prudent.