Public Information Statement
Issued by NWS National HQ

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NOUS41 KWBC 271338

Public Information Notice
National Weather Service Headquarters Washington DC
840 AM EST Fri Feb 27 2015

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 Products Effective on or about May
           15, 2015

Effective on or about May 15, 2015, the NWS will expand its
mixed-case text Product Risk Reduction effort to include
additional products (Table 1) issued by the National Hurricane
Center (NHC). Products that were issued in mixed case in 2014
will continue to be issued in mixed case (Table 2).

Table 1: NHC Additional Products

Product Name                       WMO Header          AWIPS ID
------------                       ----------          --------

Tropical Cyclone Public            WTNT31-35 KNHC      TCPAT1-5
 Advisory (Atlantic)

Tropical Cyclone Public            WTPZ31-35 KNHC      TCPEP1-5
 Advisory (Eastern Pacific)

Tropical Cyclone Update            WTNT61-65 KNHC      TCUAT1-5

Tropical Cyclone Update            WTPZ61-65 KNHC      TCUEP1-5
 (Eastern Pacific)

Tropical Weather Summary           ABNT30 KNHC         TWSAT

Tropical Weather Summary           ABPZ30 KNHC         TWSEP
 (Eastern Pacific)

Table 2: NHC Continued Products

Product Name                       WMO Header          AWIPS ID
------------                       ----------          --------

Tropical Weather Outlook           ABNT20 KNHC         TWOAT

Tropical Weather Outlook           ABPZ20 KNHC         TWOEP
 (Eastern Pacific)

Tropical Cyclone Discussion        WTNT41-45 KNHC      TCDAT1-5

Tropical Cyclone Discussion        WTPZ41-45 KNHC      TCDEP1-5
 (Eastern 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. At that time, NWS began issuing National
Public Information Notice (PNS) products using mixed-case letters
and the expanded punctuation/character set (Table 3):

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 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 lower or mixed case.  Additional
punctuation and other characters that are part of the
international reference Alphabet No. 5 will also be included as

Table 3:  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 customer`s systems
that may be caused by mixed case and the expanded punctuation/
character set in these text products.

Partners and users should be aware these products may revert back
to using all uppercase letters at any time if the NHC determines
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
  Mike Szkil
  Chief, Awareness Branch
  Silver Spring, MD  20910

National Public Information Notices are online at:

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