Tropical Storm Danny is now official as of 11AM EDT this morning. Judging by the NHC’s discussion, they aren’t entirely sure Danny is even tropical in nature:
THE STORM HAS BEEN TANGLED UP WITH AN UPPER-LEVEL LOW FOR THE PAST 24 HR…AND THE STRUCTURE AS MUCH RESEMBLES A SUBTROPICAL CYCLONE AS A TROPICAL CYCLONE. HOWEVER…CYCLONE PHASE ANALYSES FROM FLORIDA STATE UNIVERSITY SUGGEST THAT DANNY IS MARGINALLY MORE TROPICAL THAN SUBTROPICAL…HENCE THE DESIGNATION OF TROPICAL STORM.
Nevertheless, Danny has begun. Given the separation between the closed circulation at the surface and the cloud cover aloft, Danny is unlikely to strengthen much over the next few days. The official forecast does call for Danny to barely reach hurricane status (75 mph maximum sustained winds) on Saturday morning.
The forecast track brings Danny closer to the US mainland than Hurricane Bill did last weekend. Right now, it does not appear Danny’s center will make landfall on the US (with the possible exception of Cape Cod in MA), but it will pass pretty close to the North Carolina Outer Banks as it races up the east coast. Looks like another bad weekend to head to the beach.