At 5AM EDT this morning Earl was about 10 miles north of Danielle's track through this area of the basin. At 11AM it was 5 miles north of that track and at 5PM it was about 25 miles south of her track - when Danielle was a hurricane - at one point an 85 knot hurricane. I'm surprised that nobody has picked up on this (not even NHC - at least I haven't seen this fact mentioned in any of their discussions). One of the reasons that Earl is having some difficulty in getting its act together is probably upwelling. Upwelling can occur even in tropical waters. Last night when I was trying to find some reasonable cause for Earl's slow response I simply overlaid the two tracks - and bingo!
Cheers,
ED