Ida developed from Tropical Depression Eleven in the western Caribbean Sea.
Ida became extra-tropical after making landfall in the US, merged with a cold
front, and then developed into a nor'easter type storm when the remnants
encountered the warm water of the Gulf Stream.
Ida track on SST image of 5 November (278 Kb) This image
represents the average composite sea surface temperature (SST) derived from
NOAA satellite AVHRR data over the 7 days ending 5 November 2009. The
averaging is done to remove clouds. The temperature scale for SST is
20C to 30C. The track of Ida is overlaid on this image.