Allisonhouse has started ingesting various mesonet data into their subscriptions. I've been toying around with it and so far the data is excellent. Delaware's mesonet data is in there and updated every 10 minutes. Maryland will have their data in eventually, though probably not got a year.
If you are a customer, you can log in to you account then navigate: Data Feeds -> Gibson Ridge -> Observations.
From there, you can select what mesonets you want, left click the 'Update' button and then scroll back to the top to copy the placefile and input it into your instance of GR.