NOUS41 KWBC 081415 CCA



Service Change Notice 14-42: Corrected

National Weather Service Headquarters Washington DC

1015 AM EDT Fri Aug 8 2014


To:        Subscribers:

           -Family of Services

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS Partners and NWS Employees


From:      Eli Jacks

           Chief, Fire and Public Weather Services Branch


Subject:   Corrected: Operational Implementation of the Storm

           Prediction Center (SPC) Categorical Day 1-3

           Convective Outlooks for CONUS, Effective

           October 22, 2014


Corrected to change Day 2 Red Book Graphic (RBG) Categorical

Outlook WMO Header to PGWI47 KWNS and Day 3 RBG Categorical

Outlook to PGWK48 KWNS


Effective Wednesday, October 22, 2014, at 1500 Coordinated

Universal Time (UTC), the SPC Categorical Day 1-3 Convective

Outlooks for CONUS will transition from experimental to

operational status.


After operational implementation, the SPC Categorical Day 1-3

Convective Outlooks for the CONUS will include two new risk

categories. Also, the associated text products will include

these new categories and a new public-oriented, plain language

national "SUMMARY" section above the "SYNOPSIS" or geographic

area text discussion.


The addition of the new risk categories is based on customer

feedback and the need to provide better consistency with other

NWS products. Additional information and examples of these

Outlooks (using historical data) are online at:


Currently, SPC uses the risk categories; SEE TEXT, SLIGHT,



After operational implementation on October 22, 2014, the SPC

will use the following categories:


Category 1 - "MARGINAL" replaces the current "SEE TEXT".


Category 2 - "SLIGHT" - little change, except the higher risk

part of "SLIGHT" will become "ENHANCED".


Category 3 - "ENHANCED" is a new category to delineate areas of

risk in the high end of the current "SLIGHT" risk, but below

"MODERATE" risk.


Category 4 - "MODERATE" - no change.


Category 5 - "HIGH" - no change.


More information regarding these risk categories is online in

the Product Description Document (PDD) at:


The new "SUMMARY" section in the associated text products is a

general 1-2 sentence statement of the severe weather expected,

focused on the primary risk area, but including other risk areas

when appropriate.  The "SUMMARY" section facilitates consistent,

forecaster-driven, concise communication for public consumption

and for direct parsing into other products, such as the Public

Severe Weather Outlook, web page headlines, social media

communication, multimedia briefings, etc. The section header is

a single line with the word "SUMMARY" preceded and followed by

three-dot ellipses (...SUMMARY...).


The following products reflect these changes:


WMO Header  AWIPS ID   Description

----------  --------   -----------

 ACUS01 KWNS  SWODY1   Day 1 Convective Outlook Discussion

 WUUS01 KWNS  PTSDY1   Day 1 Convective Outlook Areal Outline

 PGWE46 KWNS  RBG94O   Day 1 Red Book Graphic Categorical Outlook

 LDIZ17 KWNS   N/A     Day 1 NDFD Categorical Outlook

 ACUS02 KWNS  SWODY2   Day 2 Convective Outlook Discussion

 WUUS02 KWNS  PTSDY2   Day 2 Convective Outlook Areal Outline

 PGWI47 KWNS  RBG99O   Day 2 Red Book Graphic Categorical Outlook

 LDIZ27 KWNS   N/A     Day 2 NDFD Categorical Outlook

 ACUS03 KWNS  SWODY3   Day 3 Convective Outlook Discussion

 WUUS03 KWNS  PTSDY3   Day 3 Convective Outlook Areal Outline

 PGWK48 KWNS  RBG98O   Day 3 Red Book Graphic Categorical Outlook

 LDIZ37 KWNS   N/A     Day 3 NDFD Categorical Outlook


The points products (PTSDY1, PTSDY2, and PTSDY3) will include

new labels "MRGL" (Marginal) and "ENH" (Enhanced).


For more information, please contact:


 John Ferree

 NWS Severe Storms Services

 Norman, OK  73072



 Steven Weiss

 NWS Storm Prediction Center

 Norman, OK  73072



National Service Change Notices are online at: