Karl developed from Tropical Depression Twelve over the tropical North Atlantic Ocean northwest of the Cabo Verde Islands.
Karl track on SST image of 19 September (248 Kb) This image
represents the average composite sea surface temperature (SST) derived from
NOAA satellite AVHRR data over the 7 days ending 19 September 2016. The
averaging is done to remove clouds. The temperature scale for SST is
24C to 32C. The track of Karl is overlaid on this image.