NWS forecast offices who haven't previously used impact-based warnings will start using this product format sometime in March 2016.
Warning Decision Training Division
Office of Chief Learning Officer
Below is a list of WDTD training and peer-reviwed journal articles that are particularly relevant to NWS Impact Based Warning operations. Emphasis is placed on operational tornado intensity estimation, hail size, and wind speed estimates. A section on how to best communicate those threats is also provided.