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PNSWSH

 

Service Change Notice 17-46

National Weather Service Headquarters Washington DC

1130 AM EDT Mon Apr 10 2017

 

To:        Subscribers:

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network

           -NOAAPort

           Other NWS Partners and NWS Employees

 

From:      Michelle Hawkins, Chief

           Severe, Fire, Public, and Winter Weather Services

           Branch

 

Subject:   Impact Based Warnings (IBW) to become operational at

           all Contiguous United States (CONUS) NWS Weather

           Forecast Offices (WFO) effective May 10, 2017.

 

The NWS will go operational with the IBW format at all the CONUS

WFOs on May 10, 2017. OCONUS sites will transition to the IBW

format no later than December 31, 2017. The NWS has been

experimenting with the IBW format since 2013 at a variety of

WFOs. Successes with this format along with comments received

from the public, partners and social scientists have all been

positive.

 

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:

 

http://www.weather.gov/impacts

 

A Product Description Document (PDD) outlining the products is

on-line at:

 

http://products.weather.gov/PDD/National_IBW_pdd_4_17.pdf

 

For more information, please contact:

  Jim Keeney

  Acting NWS Severe Storms Program Lead

  Kansas City, MO 64153

  jim.keeney@noaa.gov

  816-268-3141

 

National Service Change Notices are online at:

 

http://www.weather.gov/os/notif.htm

 

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