Stat. - station identifier (generally 89xxx for Antarctic stations, eg Halley is 89022) YY - Year (2 figures) MM - Month DD - Day (of month) HH - Hours (24 h clock, GMT) Latitu - Latitude Longitu- Longitude P(sta) - Surface pressure at the station. Not reported by ships. P(red) - Surface pressure reduced to mean sea level. Warning! Some stations (eg Vostok) may report reduced to 700 hPa to confuse you. Dir - Wind direction Spd - Wind speed (Note: in m/s. Often converted from knots in the message) Tempe - Temperature Dew T - Dew temperature HR% - relative humidity (in %) H_vis - Horizontal visibility (in m) WW - Present weather ww - ?past weather? CC% - Total cloud cover in % (converted from octas in the actual message) ClL - Low cloud (types, not %: see a WMO manual) ClM - Medium cloud (ditto) ClH - High cloud (ditto) CBase - Cloud base
13/Jan/1997 - comments to wmc@bas.ac.uk