surface:
-999.00: missing data
time: pacific time (local time)
ws: resultant wind speeds (m/s)
ws_scalar: scalar wind speeds (m/s)
dp: dew point (dgree C)
rh: relative humidity (%)
otemp: air temperature (degree C)
slpress: sea level pressure (mb)
precip: precipitation (mm)
wd: resultant wind direction
wd_scalar: scalar wind direction