Hi, I just added a GRIB met data mini-tutorial to the GRASS wiki site: http://grass.osgeo.org/wiki/GRIB screenshot showing forecasted winds: http://grass.osgeo.org/grass-wiki/images/TasmanSea_winds_latest.jpg * There may be a cell-registration bug: (grid vs cell-center convention) cells all offset to the east and south? have fun, Hamish