Below is an email from Dixon. After talking to him, he says the layers
should be labeled as:

 

Precipitation:

New Snow Depth – use amount if in mm, if trace is reported, assign
smallest number above 0. (There should be a snowfall flag in the
database - flag to mark if only a trace fell or if the amount is
missing)

Liquid Equivalent – use amount if in mm, if trace is reported, assign
smallest number above 0. (There should be a snowfall flag in the
database - flag to mark if only a trace fell or if the amount is
missing)

Ph of Precipitation

 

Snow Pack:

Snow Pack Depth

Snow Pack Liquid Equivalent

Snow Pack ph