In 2012 the NWS Central Region identified five offices to begin the impact based convective warning experimental product to better communicate threats to partners and constituents. The “Impacts-Based Warnings” demonstration was well received and the demonstration was expanded to all 38 Central Region offices in the spring of 2013. The positive feedback supported a continued expansion in the spring of 2015 to include 19 Southern Region offices, 7 Eastern Region and 3 Western Region offices. On October 1, 2015, 13 Southern Region coastal Weather Forecast Offices join the impact based convective warning experiment for a total of 80 WFOs participating nationwide.
Any effort to change core convective warning products must operate under tight restrictions, including time constraints and procedural limitations. In addition, any radical changes to the convective warning products would demand a rather large adjustment by core customers and partners, and a massive public education effort. Therefore, this demonstration will work within the boundaries of the well-established weather enterprise infrastructure to ensure easy absorption into mass communication channels.
The demonstration will build upon pre-existing Central Region efforts to employ “event tags” at the bottom of each warning for severe thunderstorm and tornado warnings. The additional tornado event tags will have tornado threat information attached to them as a quick means to provide users and partners with potential high impact risk signals that prompt faster risk assessment and protective action.
The Impact Based Warning experimental product began in 2012. Positive feedback supported a continued expansion in the Spring of 2015 to include 38 offices in Central Region, 19 in Southern Region, 7 in Eastern Region and 3 in Western Region. On October 1, 2015, 13 Southern Region coastal Weather Forecast Offices join the impact based convective warning experiment for a total of 80 WFOs participating nationwide.