CAC Facts


What is CAC? CAC stands for Categorical Amendment Criteria. CAC is a shift to impact-driven Terminal Aerodrome Forecast (TAF) amendments from the more traditional threshold-driven TAF amendments. Amendment criteria will be tailored to specific airport requirements of ceiling and visibility with TEMPO groups actively monitored to notify forecasters of impacts to customers.

How will this affect the aviation community? There will not be any change in the format of the TAFs or the timing of scheduled issuances.  However, amendments will be more impact driven to reduce the number of unnecessary amendments.

When and where will CAC be implemented? CAC is already being used at several NWS TAF locations and will be implemented at all NWS TAF locations across the country by early 2012. In the Texas and Oklahoma Panhandles, this includes Rick Husband Amarillo International Airport (KAMA), Dalhart Municipal Airport (KDHT), and Guymon Municipal Airport (KGUY). For these three sites, CAC will be implemented with the 00Z January 10, 2012 TAFs

Where can I get more information? If you would like more information or have comments regarding CAC please email or call your local National Weather Service office (806) 335-1121


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