Distributed during September 1994, GHF Version 1.0 contains approximately 2.1 gigabytes of compressed data. GHF provides access to selected Northern Hemisphere gridded analyses for the surface from 1899 through April 1994.
Elements are available as data values in a data table and as isopleths displayed on the map.
Plotted station elements and frontal positions are not contained on the surface analyses, nor are winds on other levels in this product. A future version is scheduled for release. The latest daily grid field data, up to the pre-production cutoff time, will be included. GHF will be updated on a periodic basis.