Help

About this System
- About how this system works

Model Listing
- A listing of most model names

About Model Error Calculations
- An indepth look at how we calculate model error on our site

About the Accumulated Cyclone Energy (ACE) Index
- About how we calculate ACE on our site

About Storm Movement Calculations
- A description of how we calculate a storm's movement, such as over 6 hours or 12 hours

About City Coordinates
- A listing of the coordinates we use for each city in our database

About Cardinal Direction
- How we convert degrees to a nice direction (ex: 90° is East)

Blue Marble and Earth at Night Imagery from NASA
- Download layers for Google Earth for a nice background to overlay data