Sandy developed from Tropical Depression Eighteen in the Caribbean Sea.
Sandy track on Atlantic Ocean SST image of 21 October (265 Kb) This image
represents the average composite sea surface temperature (SST) derived from
NOAA satellite AVHRR data over the 7 days ending 21 October 2012. The
averaging is done to remove clouds. The temperature scale for SST is
18C to 32C. The track of Sandy is overlaid on this image.