NOUS41 KWBC 281559



Public Information Notice

National Weather Service Headquarters Washington DC

1100 AM EST Fri Feb 28 2014


TO:        Subscribers:

           -Family of Services

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS partners and NWS employees


FROM:      Cindy Woods

           Chief, Operations and Requirements Division

           Chief, Performance and Awareness Division


SUBJECT:   Use of Mixed-Case Letters in Select NWS National

           Hurricane Center and Central Pacific Hurricane Center

           Products Effective on or about May 15, 2014


Effective on or about May 15, 2014, the NWS intends to expand its

mixed-case text product risk-reduction effort to include select

products issued by both the National Hurricane Center (NHC) and

the Central Pacific Hurricane Center (CPHC).


Table 1:  Operational NHC and CPHC Products Being Tested

Experimentally in the Mixed-Case Text Format


Product Name                  WMO Header         AWIPS ID

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

Tropical Weather Outlook      ABNT20 KNHC        TWOAT



Tropical Weather Outlook      ABPZ20 KNHC        TWOEP

 (Eastern Pacific)


Tropical Weather Outlook      ACPN50 PHFO        TWOCP

 (Central Pacific)


Tropical Cyclone Discussion   WTNT/41-45/ KNHC   TCDAT/1-5/



Tropical Cyclone Discussion   WTPZ/41-45/ KNHC   TCDEP/1-5/

 (Eastern Pacific)


Tropical Cyclone Discussion   WTPA/41-45/ PHFO   TCDCP/1-5/

 (Central Pacific)


This expansion in the number of available mixed-case text

products is a continuation of the risk-reduction effort which

began in August 2010 by issuing National Public Information

Notice (PNS) products using mixed-case letters and the expanded

punctuation/character set (Table 2):


AFD, RWS and PNS products at select Weather Forecast Offices

(WFOs) in October 2011:


Some RiverPro generated products at select WFOs in July 2013:




and The PWO product issued by the Storm Prediction Center in July





The NWS first began seeking comments regarding mixed-case text

products in May 2010:


NWS partners and users of these NHC and CPHC text products are

encouraged to consider the NWS’ intent and comment regarding this

next step in the risk-reduction effort. User feedback will help

the NWS better plan the eventual transition of all NWS text

products to mixed case and the expanded character set.


Please provide comments at:


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

to read and allow users to click on Internet links directly

rather than converting them to lowercase or mixed case. 

Additional punctuation and other characters that are part of the

international reference Alphabet No. 5 will also be included as



Table 2:  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 { | } ~

In this phase of our risk-reduction effort, partners and users

will have the opportunity to further identify and correct any

anomalous behavior of their systems and their customers' systems

that may be caused by mixed case and the expanded

punctuation/character set in these text products.


These products will continue to be issued using mixed-case text

through the end of the 2014 Atlantic, Eastern Pacific and Central

Pacific Hurricane Seasons, normally November 30, 2014; however,

partners and users should be aware these products may revert back

to using all uppercase letters at any time if the NHC and/or CPHC

determine it to be necessary to meet operational requirements.


For more information, please contact:


  Chris Landsea

  Science and Operations Officer

  NOAA/NWS/NCEP/National Hurricane Center

  Miami, Florida 33165



  Tom Evans

  Deputy Director

  NOAA/NWS/Central Pacific Hurricane Center

  Honolulu, Hawaii



  Michael J. Szkil

  Chief, Awareness Branch

  Silver Spring, MD

  301-713-0280, Ext. 111


National Public Information Notices are online at: