The Extra Tropical Storm Surge Model attempts to use the GFS winds in
conjunction with a modified SLOSH model to predict storm surge based
on large extra-tropical storms as opposed to the tropical storms that
SLOSH was originally developed for. The Web site combines
the Model's results with tidal predictions, and compares the results to
observed water levels to calculate an adjustment. It then combines the
Model results, the tidal predictions, and the adjustment to create a graph
of the total predicted water level.