Tropical Cyclone Valid Time Event Code (VTEC)
Updated 9 January 2007
- Product Description
Note: This product has become operational beginning with the 2006 hurricane season.
The Tropical Cyclone Watch/Warning text product (TCV) is based upon the Valid Time Event Code (VTEC).
It summarizes all new, continued, and canceled tropical cyclone
watches and warnings issued by the National Hurricane Center
for the U.S. Atlantic and Gulf coasts, Puerto Rico, and U.S. Virgin Islands. Once watches and/or
warnings are in effect for the areas mentioned, updates will be issued by the NHC at a minimum
of every six hours around 0300, 0900, 1500, and 2100 UTC. TCVs for special advisories will be
issued for the same circumstances that apply for a standard advisory. Note: NHC issues watches and
warnings using a set of breakpoints.
Following the issuance of NHC tropical cyclone advisories and tropical cyclone updates
announcing changes to watches and/or warnings, the TCV will be transmitted operationally
to users under the WMO heading of WTNT/81-85/ and AWIPS identifier TCVAT/1-5/. This product
will also be will be available on the Internet. This product can be produced for up to five
tropical cyclones in the Atlantic basin.
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