That was the problem - fuel filter. The shutoff valve needed to be turned with visegrips. Once off I found it was filled with gunk. I cleaned it in diesel and the diesel turned black immediately. After two washings I put it back on and fired it up only to find it would not start. I followed the line to a nut on the ingress side of what looked like a fuel distribution point to the injectors. I loosened the nut until fuel came out, tightened and it fired right up.
All the power is back and we are getting out now. Going to get several more filters today just to keep on hand in anticipation of the next storm tomorrow as well as some diesel additive.