This page contains links to several sites that contain useful information on NCEP and grib tiles.

Map of tile set 218:
Tile Grid

Example of a Degrib inventory on a GRIB2^? file:
Degrib Inventory

Misc. NCEP information:
http://www.emc.ncep.noaa.gov/mmb/namgrids/

Degrib Home page:
Degrib

Lat/Lon locations for Tiles:
Tile 14
Tile 15