NOUS41 KWBC 201930



Service Change Notice 16-43

National Weather Service Headquarters, Washington, DC

330 PM EDT Tue Sep 20 2016


TO:        Subscribers:

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS partners and NWS employees


FROM:      John Ferree

           Acting Chief, Severe, Fire, Public and Winter Services



SUBJECT:   Use of Mixed-case Letters in Select NWS Storm

           Prediction Center Products Effective December 6, 2016


Effective Tuesday, December 6, 2016, at 1800 Coordinated Universal

Time (UTC), the NWS will continue its transition of text products

to a mixed-case text/95 ASCII character set format. This phase of

the transition will apply to select products issued by the National

Centers for Environmental Prediction (NCEP) Storm Prediction Center



The following text products will be affected:


AWIPS ID    WMO ID               Product Name

--------  -----------   ----------------------------------

SWODY1    ACUS01 KWNS   Convective Outlook Narrative Day 1

SWODY2    ACUS02 KWNS   Convective Outlook Narrative Day 2

SWODY3    ACUS03 KWNS   Convective Outlook Narrative Day 3

SWOD48    ACUS48 KWNS   Convective Outlook Narrative Day 4-8

SEL#      WWUS20 KWNS   Public Watch Notification Message

 The # represents a single digit (0-9)-last digit of watch number

SWOMCD    ACUS11 KWNS   Mesoscale Discussion

FWDDY1    FNUS21 KWNS   SPC Fire Weather Outlook Day 1

FWDDY2    FNUS22 KWNS   SPC Fire Weather Outlook Day 2

FWDD38    FNUS28 KWNS   SPC Fire Weather Outlook Day 3-8


These products are in addition to the NCEP/SPC Public Weather

Outlook (PWO/WOUS40 KWNS) issued using the mixed-cast 95 ASCII

character set since July 2013.


This expansion in the number of available mixed-case text products

is a continuation of the NWS transition to the use of mixed-case

letters and the expanded punctuation/character set:


Allowed Mixed Case Character Set

"space" ! " # $ % & ' ( ) * + , - . /

0 1 2 3 4 5 6 7 8 9 : ; < = > ?

@ A B C D E F G H I J K L M N O

P Q R S T U V W X Y Z [ \ ] ^ _

` a b c d e f g h i j k l m n o

p q r s t u v w x y z { | } ~


Use of mixed-case letters in text products will make them easier to

read and allow users to click on links directly rather than

converting them to lower or mixed case. 


Examples of Storm Prediction Center products converted to mixed

case are online for sample formatting purposes:


If a Critical Weather Day prevents this change on December 6, 2016,

the mixed-case text format will begin on the next suitable day.


For more information, please contact:


John Ferree

Severe Storms Services Leader


Telephone: (405) 325-2209


National Service Change Notices are online at: