NOUS41 KWBC 181840 AAA



Service Change Notice 17-52 Updated

National Weather Service Headquarters Washington DC

325 PM EDT Wed Apr 19 2017


To:        Subscribers:

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS partners and NWS employees


From:      David Novak

           Director, Weather Prediction Center


Subject:   Updated: Display changes to the National Forecast

           Chart effective May 25, 2017


Updated effective date to Thursday, May 25, 2016, 5 pm

Eastern Daylight Time (EDT) due to critical weather on

original date.


Effective Thursday, May 25, 2017, beginning with the 5 pm

Eastern Daylight Time (EDT) issuance, the National Centers for

Environmental Prediction (NCEP) Weather Prediction Center (WPC)

will change the display of the National Forecast Chart weather

features as follows:


 -Eliminate arrows and labels

 -Add a legend.

 -Add color for general weather feature lines


An example of the new display is available at:


These changes have been incorporated using stakeholder feedback

to help improve the clarity of the chart.


For questions regarding the implementation, please contact:


     Greg Carbin (W/NP2)

     College Park, Maryland  20740



National Service Change Notices are online at: