TWP/MET/C1 - PWD reporting low precipitation

The PWD reported much lower precipitation values than co-located sensors. A mud wasp nest 
was removed from the lens. This may have affected visibility values as well.

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• PWD cumulative liquid precipitation(pwd_cumul_rain)
• PWD 1 hour present weather code(pwd_pw_code_1hr)
• PWD alarm(pwd_err_code)
• PWD instantaneous present weather code(pwd_pw_code_inst)
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 15 minute present weather code(pwd_pw_code_15min)