Current mid to upper level low (TUTT?) located just to the north of Puerto Rico. Is moving SW toward the Turks, Caicos and Acklin Islands. 7 hour wv loop indicates the center of the system should be near 22.0N/ 70.0W at 11Z.
Wv Loop-Puerto Rico Area
GOES Puerto Rico Section

A quick check of the models for the 12Z time frame.
NOGAPS 850mb Vorticity for 06Z 071507

Notice: The NOGAPS position is about 6 hours behind the current position.

The CMC, GFS, UKMET and NOGAPS are all indcating a small 850mb vortice in the area north of Puerto Rico at this time.
http://moe.met.fsu.edu/tcgengifs/

All of the above positions were on the 071507 0000Z model run.

CMC at 72 hrs...Mid GOM South of Pensacola
GFS at 72 hrs...Vortice just NE of the Bahamas
NOGAPS at 72 hrs...Small wave near the TX Coast
UKMET at 72hrs...Wave in the Western GOM

All are from still images at 72 hours. And I did not view the loops for continuity.