Public Information Statement 17-27

National Weather Service Headquarters Silver Spring, MD

825 AM EDT Mon Jul 10 2017


To:       Subscribers:

     -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS partners and NWS employees


From:     William Bauman

          Chief, Aviation and Space Weather Services Branch


Subject:  Soliciting Comments on Termination of the National

Convective Weather Diagnostic and Forecast Product (NCWD/NCWF)

until September 30, 2017


The NWS is accepting comments until September 30, 2017, on a

proposal to terminate the National Convective Weather Diagnostic

and Forecast Product (NCWD/NCWF). Users are encouraged to email

comments regarding this proposal to:


The NCWF is an automatically generated depiction of current convection

and extrapolated significant current convection. It is a supplement to,

but does not substitute for, the report and forecast information

contained in Convective forecasts. The NWS Aviation Weather Center (AWC)

updates the NCWD/F based on input from the Next Generation Weather Radar

(NEXRAD) and cloud-to-ground (CG) lightning data. The NCWF is updated

every 5 minutes using the most current available data from the NEXRAD

Composites delivered by Unisys and CG lightning.


The NCWD and NCWF product are online visually and through NOAAPort using

the headers WMO ZDIAT98 KKCI/JSAT98 KKCI.




Due to radar composite data termination and outdated computing servers

presenting IT security risks, this product has become unsupportable and

scientifically invalid.


Alternatives to the NCWD and NCWF include the Multi-Radar/Multi-Sensor

System (MRMS) and the NWS AutoNowcaster available through the NWS.


A Service Change Notice (SCN) will be sent before terminating this product.


If you have any questions or comments, please contact:


Brian Pettegrew, PhD.

AWC Aviation Support Branch

Kansas City, MO



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