By selecting this option, the user is presented with a large map covering the entire tropical storm basin. By left clicking on a map location, and selecting accept, this location (Latitude and Longitude) will be the selected target point.

This option when selected will change the official forecast path of the current storm to a motion directly towards the location selected below

This identifies the selected location that the official forecast will now be adjusted towards.

The user can select the "What If" location by keying in all or part of a county or city name.  The location is selected by double clicking on its row.

There are 3 intensity options when selecting the "What if" tool.

 

-  To maintain the storm's current intensity through 120 hours regardless of the official forecast intensity and wind field projections as well as ignoring landfall effects, etc..

 

-  To utilize the official forecast intensity and wind field projections throughout the 120 hour forecast period.  This method should only be used when the "What If" deviation from official forecast is relatively small and landfall times, etc. are similar to the official forecast track..

 

-  To override the official forecast motion, intensity and wind field projections.  When this option is selected, the "Intensity and Wind Field" tab is enabled and the user can then override the forecast parameters.

This is the area where the user can override the official forecast information for the "What if" forecast.  The user can adjust the storm's forward speed, wind intensity, and areas of 64, 50 and 34 knot winds.

This closes the current window saving the changed options.

This closes the current window WITHOUT saving the changed options.