Why is it that this latest interesting storm had to occur during the same week that classes started, I had an interview on the east coast, and a case of the stomach flu... I think I'm back to normal again, and ready to start obsessing about this storm.

I noticed the southernly component to last night's motion and assumed it would track the models west. That has happened, but there is still the forecast for a pretty quick turn to the north and then back east. I've looked at the water vapor, which usually helps me with projected path, but I'm not seeing it. Can someone explain why the models forecast such a dramatic turn in forward motion?