NOUS41 KWBC 071410 AAA



Public Information Notice: Amended

National Weather Service Headquarters Washington DC

1010 AM Tue EDT Aug 7 2012


To:        Subscribers:

           -Family of Services

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS partners and employees


From:      Cynthia Abelman

           Chief, Aviation Services Branch


Subject:   Amended: Soliciting Comments on the Experimental

           Aviation Winter Weather Dashboard through

           April 15, 2013.


Amended to extend the solicitation of comments on the

Experimental Winter Weather Dashboard through April 15, 2013.


The Experimental Aviation Winter Weather Dashboard (AWWD) depicts

a potential winter weather impact to the Core 30 Airports. The

AWWD is updated four times per day. The Web display indicates the

potential impact to each airport through a matrix of color coded

boxes that depict impact through 87 forecast hours:


- nominal (green)

- slight (yellow)

- moderate (orange)

- high (red) impact. 


The impact information is calculated using the operational

Short Range Ensemble Forecast (SREF) numerical weather prediction

system and climatology.


The AWWD was developed to support the Federal Aviation

Administration Air Traffic Control System Command Center to

coordinate long range strategic winter weather planning by

providing guidance on the impact from winter weather at major



The Experimental Aviation Winter Weather Dashboard will only be

available at:


The AWWD renders the potential impact to each airport, at

3-hourly forecast intervals, based on certain thresholds of

forecast winter weather conditions. The probability of

accumulated snowfall, accumulated freezing rain, and visibility

are used to determine the particular impact category assigned to

each airport. The airports are split into four separate impact

groups, based upon the airports’ ability to operate during winter

weather conditions, which is based on annual snowfall

climatology. Each group has a specific probabilistic threshold

for snowfall/ice pellets, freezing rain, and visibility that

determine the category.


Questions? comments? please contact:


Michael Pat Murphy

Warning Coordination Meteorologist

Aviation Weather Center

Kansas City, MO 64153



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