a lot of good changes
Posted by cypresstx on 6/2/2017, 8:08 am
http://www.nhc.noaa.gov/news/20170309_pa_2017SeasonChanges.pdf

this one is really interesting, but they make is sound incredibly convoluted - better info at their link at the bottom

5)   Changes to the National TCV

The format and content of the Atlantic basin National TCV, which provides Valid Time Event Code (VTEC) data for tropical cyclone watches and warnings, will change in 2017.  In prior years, this National Hurricane Center product only contained information on coastal tropical cyclone wind watches and warnings.  Beginning this year, the National TCV will also contain information on inland tropical cyclone wind watches and warnings, as well as on the new storm surge watches and warnings.

It is, essentially, a compilation of all the land-based tropical cyclone watch/warning VTEC information provided in the applicable WFO TCV products.  Because the new National TCV compiles information from many WFOs, it will generally be issued 10-15 minutes later than in previous years.  In some cases, such as for Special Advisories, the issuance of the National TCV could lag the rest of the NHC advisory products by up to 45 minutes.

In the new National TCV, the representation of watches/warnings is provided only in terms of zones; it will no longer include information on coastal breakpoints.  As a result,  the National TCV can only convey an approximate description of the watch/warning areas.  The precise lateral extent of tropical cyclone wind watches and warnings along the coastline will continue to be specified by breakpoints in the Tropical Cyclone Public Advisory. The precise extent of storm surge watches/warnings will be  specified in gridded form through the National Digital Forecast Database.

Additional  information  on  the  new  National  TCV  format  can  be  found  here:
http://www.nhc.noaa.gov/experimental/tcv/
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What's New from the NHC and the NWS for 2017 Hurricane Season - Spin_Doctor, 5/31/2017, 8:36 am
  • a lot of good changes - cypresstx, 6/2/2017, 8:08 am
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