NOUS41 KWBC 261130



Technical Implementation Notice 16-39

National Weather Service Headquarters Washington DC

730 AM EDT Thu Oct 27 2016


To:        Subscribers:

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS partners and employees


From:      William Bauman

           Chief, Aviation and Space Weather Services Branch


Subject:   Operational Implementation of Aviation Weather Center

           (AWC) Impacts Terminal Aerodrome Forecast (TAF) Board

           Effective November 28, 2016


Effective November 28, 2016, the NWS Aviation Weather Center's (AWC)

Impacts Terminal Aerodrome Forecast (TAF) Board will transition from

experimental to operational status.


The AWC Impacts TAF Board is a time series display at airports

designed to highlight forecasted significant weather impacts on the

National Airspace System (NAS) across the United States. The purpose

of the TAF Board is to enable the aviation community to quickly

ascertain the specific impacts at key airports across the United

States based on the TAF.


Each box (hourly forecasts from TAF) is color-coded based on the

level and potential impact of weather hazards, while using

thresholds specific to each airport.


White: no impact

Yellow: slight impact

Orange: moderate impact

Red: high impact


The letters in the box represent the cause of the impact:


CIG: Ceiling (hundreds of feet, Above Ground Level (AGL))

VIS: Visibility (statute miles)

WX: Weather (see legend)

WSpd: Wind speed (knots)

WGust: Wind gusts (knots)


More detailed information can be found for each site by clicking

on the station identifier. This data assists dispatchers and air

traffic managers with flight planning, while also supporting

situational awareness and operational decision making.


The AWC Impacts TAF Board is also meant to consolidate pre-existing

situational displays into a single, authoritative source. As a

result, the following experimental webpages will be discontinued

when the Impacts TAF Board is operationally implemented:



The AWC Impacts TAF Board will be available at:


The Product Description Document can be found at:


For questions regarding the Impacts TAF Board, please contact:


Mike Bettwy

Warning Coordination Meteorologist

Aviation Weather Center

Kansas City, MO 64153



National Technical Implementation Notices are online at: