34 numerical values plus one string

8 headlines

N1  Year
N2  Month
N3  Day
N4  Hour
N5  Minute
A1  Data Source and Uncertainty Flags
N6  Dry Bulb Temperature in degrees C, missing 99.9
N7  Dew Point Temperature in degrees C, missing 99.9
N8  Relative Humidity in percent, missing 999
N9  Atmospheric Station Pressure in pascal, missing 999999
N10 Extraterrestrial Horizontal Radiation in Wh/m2, missing 9999
N11 Extraterrestrial Direct Normal Radiation in Wh/m2, missing 9999
N12 Horizontal Infrared Radiation Intensity in Wh/m2, missing 9999
N13 Global Horizontal Radiation in Wh/m2, missing 9999
N14 Direct Normal Radiation in Wh/m2, missing 9999
N15 Diffuse Horizontal Radiation in Wh/m2, missing 9999
N16 Global Horizontal Illuminance in lux, missing 999999
N17 Direct Normal Illuminance in lux, missing 999999
N18 Diffuse Horizontal Illuminance in lux, missing 999999
N19 Zenith Luminance in Cd/m2, missing 9999
N20 Wind Direction in degrees, missing 999
N21 Wind Speed in m/s, missing 999
N22 Total Sky Cover 0..10, missing 99
N23 Opaque Sky Cover (used if Horizontal IR Intensity missing), missing 99
N24 Visibility in km, missing 9999
N25 Ceiling Height in m, missing 99999
N26 Present Weather Observation
N27 Present Weather Codes
N28 Precipitable Water in mm, missing 999
N29 Aerosol Optical Depth in thousandths, missing .999
N30 Snow Depth in cm, missing 999
N31 Days Since Last Snowfall, missing 99
N32 Albedo, missing 999
N33 Liquid Precipitation Depth in mm, missing 999
N34 Liquid Precipitation Quantity in hr, missing 99
