Then, a few hours before landfall, Sandy began a sharp curve toward the west, moving toward the heart of the approaching midlatitude trough of low pressure. In Shapiro’s view, this marked an apparent warm seclusion trying to take place on top of the storm’s fast-decaying warm core.
I asked Shapiro how often he’s seen a storm like Sandy. He replied, “Never.”
Gives an idea: Shapiro's motion graphics are far more compelling (if a little cumbersome to load). Final image, which graphs Sandy's "vorticity," is perhaps the most compelling of all.