Skip Navigation Links   
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
National Hurricane Center
Local forecast by
"City, St" or "ZIP"

Alternate Formats
   Text     |   Mobile
   Email   |   RSS XML/RSS logo
   About Alternates
Cyclone Forecasts
   Latest Advisory
   Past Advisories
   About Advisories
Marine Forecasts
   Atlantic & E Pacific
   Gridded Marine
   About Marine
Tools & Data
   Satellite | Radar
   Analysis Tools
   Aircraft Recon
   GIS Datasets
   Data Archive
   Forecast Accuracy
Outreach & Education
   Storm Surge
   About Cyclones
   Cyclone Names
   Wind Scale
   Most Extreme
   Forecast Models
   Glossary | Acronyms
   Frequent Questions
Our Organization
   About NHC
   Mission & Vision
   Staff | Q&A
   Visitors | Virtual Tour
   Library Branch
   NCEP | Newsletter
Contact Us
Follow the National Hurricane Center on Facebook Follow the National Hurricane Center on Twitter
Subscribe the National Hurricane Center on YouTube Read the National Hurricane Center Inside the Eye blog on WordPress is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.

Service Change Notice

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:

Quick Navigation Links:
Tropical Cyclone Forecasts  -  Tropical Marine Forecasts  -  Data Archive
Outreach  -  Prepare  -  About Cyclones  -  About NHC  -  Contact Us

NOAA/ National Weather Service
National Centers for Environmental Prediction
National Hurricane Center
11691 SW 17th Street
Miami, Florida 33165 USA
Information Quality
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities
Page last modified: Friday, 28-Feb-2014 19:38:00 UTC