I'm literally listening to Harvey on the retro broadcast of Channel 7's coverage of the Blizzard of '78 from the weekend after, on Youtube. The amusing part was the anchor cut Dukakis short from telling too long a story to get to a young Harvey. He mentioned a "dual center", one near the surface and another high up in the atmosphere, contributing to the strength of the blizzard. I'm no expert but maybe someone could clarify, but does that sound similar to the "dual lows" some of these models are producing?