NOUS41 KWBC 142000 CCA



Service Change Notice 10-43, Corrected

National Weather Service Headquarters Washington DC

400 PM EDT Thu Oct 14 2010


To:       Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          Other NWS partners and employees


From:     Kim Runk

          Chief, Integrated Services Division

          Central Region Headquarters Kansas City , MO


Subject:  Corrected to include Special Marine Warnings (SMW) and

          Marine Weather Statements (MWS) for the Great Lakes .

          Transition from Experimental to Operational Status of

          the Wind-Hail Tag Line for NWS Central Region Severe

          Thunderstorm Warnings: Effective November 15 2010


Effective Monday, November 15, 2010, NWS Weather Forecast Offices (WFOs) in the NWS Central Region (CR) will transition a service enhancement associated with severe thunderstorm warnings from experimental to operational status. The enhancement is the concise coded tag line identifying maximum forecast wind gusts and hail size at the end of severe thunderstorm warnings (SVR), associated follow-up statements (SVS), Special Marine Warnings (SMW) for the Great Lakes and Marine Weather Statements (MWS) for the Great Lakes .


Inclusion of this information at the end of these products represents an effort to respond to requests from partners in the emergency management community and several societal impacts groups. One specific application concerns the use of this information to activate emergency alert sirens when conditions exceed user-defined thresholds, a decision normally reserved for tornado events.


The tag line makes easily accessible the information necessary to reach such a decision. In addition, it facilitates the use of parsing software to automate alerting functions whether by government officials or private sector vendors.


Feedback during the experimental test period was so overwhelmingly positive that the NWS CRH decided to make this change a permanent and official part of severe thunderstorm warnings issued from NWS CR WFOs. A map showing all CR WFOs is available online at:


A more detailed description of the coded tag line, including format and examples, can be found in the Service Description Document (SDD) at:


For further information, please contact:


     Kim Runk, Chief of Integrated Services

     NWS Central Region Headquarters

     7220 NW 101st Terrace

     Kansas City , MO 64153


National Service Change Notices are online at: