Setup your bridge on MyAcuRite.com (requires AcuBridge or SmartHub).
After you have registered your station on Weather Underground:
you can enter your station ID and station key/ password in the menu in the upper right hand corner to "Share Weather" to send your weather data to Weather Underground.
The password for your weather station is no longer the same as the password for your wunderground.com account. It is now a separate key that is generated specifically for each Weather Underground station ID. You can find the station key/password associated with each weather station in your list of weather stations here: