The ultimate key for Ike is going to be how fast Hanna moves out. A continued slow movement for Hanna and Ike will catch up to the storm and will likely be directed northward in a bit of Fujiwhara-style interaction given its small size versus Hanna's large size. If Hanna starts to move northwestward soon, however, these effects are likely to be minimal. Look at the 00z model guidance for further clues on this -- the slower Hanna moves, the more poleward Ike is directed. The UKMET model has been consistent with this for many runs now and the global models, all of which have pretty good representations of Hanna, suggest a slower movement than the GFDL/HWRF hurricane models and show a tad more interaction with Ike. What will happen? What happens today will be a big clue to that.

Overnight, Ike looks to be developing an eye and is nearing hurricane intensity; Josephine's deep convection has weakened and now the storm is caught between an upper level trough to its northwest and a very large tropical wave to its east. It's so far east, though, that even if it were to somehow make it across the ocean it is at least 10 days from the mainland. Hanna is still highly sheared but with such a large circulation envelope it's not going anywhere anytime soon unless it somehow manages to slide over Hispaniola. It should ultimately end up making landfall somewhere on the SE US coast, but as noted above it's still very much an open question as to explicitly when this occurs.