UK observations detailed documentation
" units="m">Visibility</Param> <Param name="D" units="compass">Wind Direction</Param> <Param name="S" units="mph">Wind Speed</Param> <Param name="W" units="">Weather Type</Param> <Param name="P" units="hpa">Pressure</Param> <Param name="Pt" units="Pa/s">Pressure Tendency</Param> <Param name="Dp