We send emails when Weather Underground has not received data from your station in over two hours. You can opt-in to these emails by going to your list of weather stations and click on the settings gear next to your weather station name. You should see an option to "Edit" which takes you to the edit page. Near the bottom of this edit page check the box next to "I would like to receive PWS notifications". Then hit "Submit" in order to save your changes.
We currently do not send email notifications when your station does not pass our QC process. We are currently working on a visualization for QC status on the PWS dashboard page (or history page). For more information on our quality control process click here.
If you have additional questions, please email firstname.lastname@example.org.