From Mid-Atlantic WX.com

Storm Distance Calculator

Enter latitude and longitude of storm and city to find distance between them.
Here's how: Enter your coordinates in the boxes under "City". Enter the storm's coordinates in the
boxes under "Storm". Press Calculate to see distance in miles and kilometers.
  City   Storm  

   Distance

  
  Lat:  oN
Lon: oW		   Lat:  oN
Lon: oW		     Miles
    Km

Need help finding your Latitude and Longitude? If you're in the US, click HERE. A new window will open, just keep clicking until you pinpoint your location. Enter Latitude in this format: 37.79. Enter Longitude in this format: -79.50. International users click Here. Enter your address; Lat-Long will appear in lower left corner of screen. Enter (or cut & paste) under "City".

 Get the current storm coordinates here. Click the name of the storm, scroll to the latest advisory to see the current position in Longitude and Latitude. Enter (or cut & paste) under "Storm".