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Explanation of headings in the METLOG output

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.
P(tnd) - Pressure tendency
Dir    - Wind direction
Spd    - Wind speed (Note: in knots. Previously erroneously stated to be in m/s.)
Tempe  - Temperature [oC]
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 octas (previously erroneously stated to be in %)
ClL    - Low cloud (types, not %: see a WMO manual)
ClM    - Medium cloud (ditto)
ClH    - High cloud (ditto)
CBase  - Cloud base

comments to wmc@bas.ac.uk

Past last modified: 20/10/2002

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