You can not hook up a weather station, but you can definitely use it.
http://www.wxqa.com/cwop_info.htm
Navigate to the CWOP link above and become a member of CWOP. Read and follow the instructions to become a CWOP member, as well as for your weather station and weather software. Once you acquire a CWOP identification (ID), set up your weather software/station to send your data!
Then, your personal weather station will appear in the app's list.
