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Public Information Statement, Amended

National Weather Service Headquarters Washington DC

900 AM EST Fri Dec 2 2016


TO:      Subscribers:

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS Partners and NWS Employees


FROM:    Eli Jacks

         National Weather Service Headquarters

         Chief, Forecast Services Division


         John Guiney

         Eastern Region Headquarters

         Chief, Meteorological Services Division


SUBJECT: Amended: Soliciting Comments until April 15, 2017, on

     the Days 3-7 Winter Storm Threat Index from NWS Weather

          Forecast Office (WFO) Baltimore/Washington, DC


Amended to add Day 3 to the experiment and to extend the comment

period to April 15, 2017


WFO Baltimore/Washington is soliciting comments on the

Experimental Days 3-7 Winter Storm Threat Index through April

15, 2017. The purpose of this experimental product is to

graphically display the location and level of potential

winter storm threats in the extended portion of the forecast 

3-7 days in the future. This threat level will combine winter

precipitation probabilities and potential impact.


The experiment received positive feedback last year for days 4-7

and is being amended to include day 3 this year to address

concerns provided through user comments.


The experimental Days 3-7 Winter Storm Threat Index graphic also

builds upon data generated by experimental Winter Weather

Outlooks produced by the NWS Weather Prediction Center (WPC).


The experimental Days 3-7 Winter Storm Threat Index will be

posted on the NWS Baltimore/Washington winter web page at:


WFO Baltimore/Washington will begin issuing this experimental

product on Tuesday, December 6, at least twice daily at 0900 and

2100 Coordinated Universal Time (UTC) and as needed. No

communication system changes are required to receive this



Additional information and an example of the experimental

product are provided at the link below:


Comments may be submitted via the survey link below. The link

will also be provided on the NWS Baltimore/Washington winter web



If comments are favorable, this experiment will be evaluated for

possible expansion to other NWS offices. An additional

opportunity for comment/review will be provided before a

decision to expand.  If you have questions, please contact:


Christopher Strong

Warning Coordination Meteorologist

NWS Baltimore/Washington



NWS Public Information Statements are online at: