This two-volume CD-ROM set available from the National Climatic Data Center (NCDC) uses 2.5 degree gridded, upper air climatic summaries derived from the European Centre for Medium Range Weather Forecasts (ECMWF) model analyses. It uses data from selected upper air stations from all over the world for the 12-year period (1980-1991), including individual months. The CD-ROMs present upper air ... statistics for 15 different vertical levels for for dry bulb and dew point temperature, geopotential height, air density, and vector and scalar wind speed. They also provide access/display software for gridpoint data, contouring capability for user-defined areas, and vertical profiles. This was a joint NCDC and US Navy product. Also available is a supplementary ASCII-data CD-ROM (no graphic interface) for the 1980-1995 period.