Looks like there is already decay in the pic, probably why it failed. I would trim it as well as can be done and hope for the best...
On a sidenote... and I may get flamed for this... in a storm situation like that, I believe it can be an exception to the rule of not spurring trims. Obviously you have a ton of work to do, and a light spur up to that point is probably not going to appreciably add to the stress that tree is already under. That is one of the reasons I climbed with pole spurs instead of tree spurs... in a situation like that ankles out, 7 or 8 light steps up, throw your lifeline over the crotch to the left for a second TIP, a quick cut and on to the next one. Storm work is a little different.
