Brian,
You should also take a look at the new CWOP Snow reporting form (http://www.madis-fsl.org/snow_data_login.html).
It’s meant for manual snow data input, but we should be able write code to emulate the form entry. They have a place for snow depth. They only expect 1" accuracy for the snow depth. They also only expect the data once a day.
It’s a shame they didn’t add the input to the existing CWOP data stream…
I’d rather see data sent every 5 minutes so you can tell what’s going on outside… but it’s a start.
Chris