Data from the Maryland Mesonet is now available to the public. Our Clarksville Site (001MD) can be found on the NWS Enhanced Data Display. Additional sites will be installed next week, and we hope to have about 6 to 10 sites in total streaming data by New Years. So long as the winter isn't too rough, we may be able to keep installing stations.
We are working on a map on the Maryland mesonet website, but there have been some complications with data getting past the UMD firewall. Eventually, we'll have products similar to Oklahoma and New York mesonets.
NOTE: For any NOAA folks here, it's site ID 001MD in the Synoptic API.
Click HERE to view data.
EDIT: To add the data, click on the link above then under Layers -> Surface Observations and Analysis -> Near Real-Time Weather Observations (NOAA) and click the Synoptic API radio button under Interactive Observation Control.