Helene developed from Tropical Depression Eight in the tropical Atlantic
Helene track on SST image of 20 September (227 Kb)
This image represents the average composite sea surface temperature (SST)
derived from NOAA satellite AVHRR data over the 7 days ending 20
September 2006. The averaging is done to remove clouds. The temperature
scale for SST is 22C to 32C. The track of Helene is overlaid on this image.