WXT QC - Mixed/Frozen Precipitation Flag

[jrobrien91]

As the WXT provides information on the "rainfall accumulation" at the sensor, a quality control flag should be created to mask times of mixed or frozen precipitation.

It has not yet been determined if the WXT will respond to these events, but an edge app / combination of the Parsival/FD-70, MRR and Ceilometer datastreams should be used to define the periods.

I have noted multiple instances of snow at NEIU that can be used for analysis and can relay that information as needed.