Variable Description English Units Metric Units 
ALR, unknown   
ALTI, Altimeter,  in  mb 
CHC1, Cloud_layer_1 height/coverage   
CHC2, Cloud_layer_2 height/coverage   
CHC3, Cloud_layer_3 height/coverage   
CIG, Ceiling,  feet,  meters 
CSLR, Clear Sky Solar Radiation,  W/m*m,  W/m*m 
CSYH, High_cloud symbol   
CSYL, Low_cloud symbol   
CSYM, Mid_cloud symbol   
DIRS, Sonic_Wind Direction, °, ° 
DRCT, Wind Direction, °, ° 
DWPF, Dewpoint, ° F, ° C 
EVAP, Evapotranspiration,  in,  mm 
FM, 10_hr_Fuel Moisture,  gm,  gm 
FT, Fuel Temperature, ° F, ° C 
GRIP, Grip 2 Level of Grip     
GUST, Wind Gust,  mph,  m/s 
HFLX, Vertical Heat_Flux,  m/s C,  m/s C 
HI24, 24 Hr High Temperature, ° F, ° C 
HI6, 6 Hr High Temperature, ° F, ° C 
HSUN, Hours of sun   
IFRC, Grip 1 Ice Friction Code     
LO24, 24 Hr Low Temperature, ° F, ° C 
LO6, 6 Hr Low Temperature, ° F, ° C 
MDIR, Wind Direction, °, ° 
MDWP, Dew Point, ° F, ° C 
MELV, Elevation,  ft,  m 
MFLX, Vertical Moisture_Flux,  m/s g/m**3,  m/s g/m**3 
MGPH, Geopotential Height,   m 
MGST, Wind Gust,  mph,  m/s 
MLAT, Latitude   
MLON, Longitude   
MPRS, Pressure,  in ° F,  mb 
MRH, Relative Humidity, %, % 
MSKT, Wind Speed,  mph,  m/s 
MSOI, Soil Moisture, %, % 
MSTD, Moisture Standard_Deviation,  g/m**3,  g/m**3 
MTMP, Temperature, ° F, ° C 
MTVR, Virtual Temperature,  ft, ° C 
NETL, Net_Radiation (long_wave),  W/m*m,  W/m*m 
NETR, Net_Radiation (all_wavelengths),  W/m*m,  W/m*m 
NETS, Net_Radiation (short_wave),  W/m*m,  W/m*m 
OTOT, Sonic_Obs Total     
OUTS, Outgoing_Radiation (short_wave),  W/m*m,  W/m*m 
P01I, Precipitation 1hr,  in,  cm 
P01M, Precipitation 1hr manual,  in,  cm 
P03D, Pressure Tendency,  in,  mb 
P03I, Precipitation 3hr,  in,  cm 
P03M, Precipitation 3hr manual,  in,  cm 
P05I, Precipitation 5min,  in,  cm 
P05M, Precipitation 5min manual,  in,  cm 
P06I, Precipitation 6hr,  in,  cm 
P06M, Precipitation 6hr manual,  in,  cm 
P10I, Precipitation 10min,  in,  cm 
P10M, Precipitation 10min manual,  in,  cm 
P15I, Precipitation 15min,  in,  cm 
P15M, Precipitation 15min manual,  in,  cm 
P1MI, Precipitation 1min,  in,  cm 
P24I, Precipitation 24hr,  in,  cm 
P24M, Precipitation 24hr manual,  in,  cm 
P30I, Precipitation 30 min,  in,  cm 
PACM, Precipitation smoothed,  in,  cm 
PCHA, Pressure change   
PDIR, Peak_Wind Direction, °, ° 
PEAK, Peak_Wind Speed,  mph,  m/s 
PLDR, Platform True_Direction, °, ° 
PLSP, Platform True_Speed,  mph,  m/s 
PMSL, Sea_level pressure,  in,  mb 
PREC, Precipitation accumulated,  in,  cm 
PREM, Precipitation manual,  in,  cm 
PRES, Pressure,  in,  mb 
PSTM, Precipitation storm   
PSWD, Primary_Swell Wave_Direction, °, ° 
PSWH, Primary_Swell Wave_Height,  ft,  m 
PSWP, Primary_Swell Wave_Period,  sec,  sec 
PWVP, Precipitable water vapor,  in,  cm 
QFLG, Quality check flag   
RELH, Relative Humidity, %, % 
RNUM, Road sensor number   
RNWG, Precipitation (weighing_gauge),  in,  cm 
RSS, Road_Surface Conditions   
SACM, Snow smoothed,  in,  cm 
SINT, Snow interval,  in,  cm 
SKNT, Wind Speed,  mph,  m/s 
SNOM, Snow manual,  in,  cm 
SNOW, Snow depth,  in,  cm 
SOLR, Solar Radiation,  W/m*m,  W/m*m 
SPDS, Sonic_Wind Speed,  mph,  m/s 
SSTM, Snowfall,  in,  cm, 
SSWD, Secondary_Swell Wave_Direction, °, ° 
SSWH, Secondary_Swell Wave_Height,  ft,  m 
SSWP, Secondary_Swell Wave_Period,  sec,  sec 
STEN, Soil Moisture tension,  centibar,  centibar 
T10M, Air_Temperature at_10_meters, ° F, ° C 
T182, 18_Inch Soil_Temperature2, ° F, ° C 
T18I, 18_Inch Soil_Temperature, ° F, ° C 
T20I, 20_Inch Soil_Temperature, ° F, ° C 
T2M, Air_Temperature at_2_meters, ° F, ° C 
TFZ, Road_Freezing Temperature, ° F, ° C 
TGND, Ground Temperature, ° F, ° C 
TIC, Temperature in_case, ° F, ° C 
TIDN, Tide Indicator,   
TIDP, Tide Departure,  ft,  m 
TIR, IR_Soil Temperature, ° F, ° C 
TLKE, Water Temperature, ° F, ° C 
TLRW, Water Temperature ,° F, ° C 
TMPF, Temperature, ° F, ° C 
TRD, Road Temperature, ° F, ° C 
TSNC, Sonic Temperature, ° F, ° C 
TSOI, Soil Temperature, ° F, ° C 
TSRD, Road Subsurface Temperature, ° F, ° C 
TSTD, Temperature Standard_Deviation, ° C, ° C 
USTD, Zonal_Wind Standard_Deviation,  m/s,  m/s 
USTR, Friction Velocity, m/s,  m/s 
VOLT, Battery voltage,  volt,  volt 
VSBY, Visibility,  miles,  km 
VSTD, Meridional_Wind Standard_Deviation,  m/s,  m/s 
WARN, Sonic Warnings       
WEQS, Snow water equivalent,  in,  cm 
WHGT, Wave Height,  ft,  m 
WNUM, Weather conditions   
WPER, Wave Period,  sec,  sec 
WRAT, SIGW/USTR     
WSNC, Vertical_Velocity,  m/s,  m/s 
WSTD, Vertical_Wind Standard_Deviation,  m/s,  m/s