If the UK Met turns out to be right, we will have witnessed a rare phenominon. This would be the second straight time that two systems formed in relatively similar places and from the same system at more-or-less the same time. For Bertha and Christobal, it was a surface trof that didn't make it that far offshore. This trof went further, but if it verifies, will also spawn twins.

If there is a danger from this setup, I think the greatest threat lies for the Atlantic coast between FL and NC. If something were to develop and hang out there for a few days, the steering would almost guarantee a US East Coast landfall. I guess we'll see what happens. But if anything does, remember where you saw it

Steve