CDSS is now providing REST services to consume HydroBase data. These services have replaced the SOAP services previously provided. (The SOAP services are no longer available.)
You can view the list of available services on the CDSS REST Services page.
In conjunction with this release, a new version of TSTool (12.06.00) is available, and is capable of consuming the new REST Services.
You can download the latest version of TSTool here.