Fay developed from Subtropical Depression Seven in the North Atlantic Ocean south of Bermuda.
A subtropical storm is defined by NOAA as a non-frontal low pressure system that has characteristics of both tropical and extratropical cyclones.
On 11 October, Fay transitioned to a tropical storm and, on 12 October, briefly became a hurricane.
Fay track on SST image of 04 October (253 Kb) This image
represents the average composite sea surface temperature (SST) derived from
NOAA satellite AVHRR data over the 7 days ending 4 October 2014. The
averaging is done to remove clouds. The temperature scale for SST is
20C to 32C. The track of Fay is overlaid on this image.