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NOUS42 KTAE 111514

1114 AM EDT FRI SEP 11 2015 /1014 AM CDT FRI SEP 11 2015/

...Soliciting Comments on Experimental Impact Based Warnings...

To:        Subscribers:
           -Family of Services
           -NOAA Weather Wire Service
           -Emergency Managers Weather Information Network
           Other NWS Partners and NWS Employees

From:   Heath Hockenberry
           Acting Chief, Severe, Fire, Public and Winter Services

Subject:   Amended: Soliciting Comments until November 4, 2015,
           on Experimental Impact Based Warnings

Amended to add 13 Southern Region coastal Weather Forecast
Offices effective October 1, 2015

NWS is accepting comments beginning Wednesday, April 1, 2015, and
continuing through Wednesday, November 4, 2015, on an expansion
of its Experimental Impact Based Warnings. All 38 NWS Central
Region Weather Forecast Offices (WFOs), all 32 Southern Region
WFOs, 7 Eastern Region WFOs, and 3 Western Region WFOs will issue
enhanced convective warnings. A list of participating offices and
local points of contact is online at:

This is an expansion of the Experimental Impact Based Warning
demonstration begun in 2014:

Severe Thunderstorm Warning (SVR), Tornado Warning (TOR) and
Severe Weather Statement (SVS) products will be stratified into
categories distinguishing extreme cases from base convective
warnings. Additional enhanced wording will be included to convey
information about associated impacts, specific hazards expected,
and recommended actions, both within the bullet statements and as
part of the tag line codes.

Additional information and product examples are online at:

A Product Description Document (PDD) outlining the products is
online at:

Based on demonstration results, the Impact Based Warnings are
being considered for implementation on a national basis.

Please submit comments on the proposed national implementation

After the experimental period is completed and the comment period
closes, NWS will evaluate all comments to determine whether to
implement the Experimental Impact based warnings as operational

For more information, please contact:

  Jane Hollingsworth
  National Weather Service
  Tallahassee, FL


National Service Change Notices are online at:

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