NSA/MET/C1 - Frosting/Condensation

Beginning 20111108, the PWD began occasionally frosting over, signaling an alarm code and 
sometimes causing the PWD to stop reporting. A new PWD with hood heater attachment was 
installed 20130222.

Assume incorrect PWD data during times when PWD error code was reported.

• PWS cumulative liquid precipitation(pws_cumul_rain)
• PWS alarm(pws_err_code)
• PWS 1 minute mean precipitation rate(pws_precip_rate_mean_1min)
• PWS cumulative snow(pws_cumul_snow)
• PWS 15 minute present weather code(pws_pw_code_15min)
• PWS 1 hour present weather code(pws_pw_code_1hr)
• PWS instantaneous present weather code(pws_pw_code_inst)
• pws_vis_mean_1min
• pws_vis_mean_10min