National Weather Service United States Department of Commerce

Extreme HeatRisk and Severe Weather Concerns

Major to Extreme HeatRisk continues for parts of the Mississippi Valley, mid-Atlantic and Northeast today. Additional heat concerns are increasing for the Pacific Northwest this week. Meanwhile, a cold front continues to track southward across the center of the nation. This will focus more showers and thunderstorms, some severe alongside excessive rainfall, from the Plains to the East Coast. Read More >


Transition of NWWS-OI to New Infrastructure Effective April 23, 2024

see SCN24-32 

Topic Description

General Description

The National Weather Service (NWS) enterprise National Oceanic and Atmospheric Administration (NOAA) Weather Wire Service (NWWS) provides television and radio broadcasters, emergency managers, commercial / private alerting services, and the general public the fastest receipt of current weather information, alerts and warnings sent in text format from the local NWS Weather Forecast Offices and National Centers.

NWWS has been designed to use both an Internet (NWWS-Open Interface) and a Satellite product source (SBN/NOAAPORT Channel 201).  Use of both ingests is highly recommended to achieve a >98% product availability rating.  The NWWS is the fastest NWS dissemination method of receiving text formatted alerts and warnings. 

NOTE:  The NWWS Open Interface will experience planned and unplanned outages up to three times per month; with planned outages lasting on average between 10 minutes to less than 4-hours.  Unplanned outages have lasted longer than 10 hours.  


System Information
Red Bullet showing operational status as non-operational
Green Bullet showing operational status as good
Galaxy 28 / 31


Image of a Satellite with the Earth reflected in the solar panel - NOAA Image



Transition of NOAA Weather Wire Service Open Interface (NWWS-OI) to New Infrastructure Effective: April 23, 2024



OI text goes here





  • ​Satellite Dish 1.8m (may have interference) or larger for better reception 2.4m or greater.
  • Satellite Configuration Information
  • Low Noise Band (LNB) down converter

  • DVB-S2 compatible satellite receiver (NOVRA S300 or similar)

  • Ethernet, RF coaxial and CAT5 network cables as necessary

  • Windows - based PC

  • Minimum - 20GB storage and 3GB RAM

  • SBN/NOAAPORT Channel 201



  • XMPP Reader developed by end-user or purchased commercially.
  • Coding
    • There is a single XMPP chatroom that has a single user inside the room that is able to talk.  This bot user emits a <message> stanza that contains a special payload that has the raw text included.  Here is an example message stanza:
    • So if you are in the chatroom with a client that does not process this special <x> payload, you won’t see all the raw text included in the stanza.  The attributes on the <x> stanza are as follows:
    • The id attribute on the <x> stanza is meant to help clients know if they are missing any products as they parse the stream.  The id contains two values loaded up into one and they are separated by a period. The first number is the UNIX process ID on the system running the ingest process.  The second number is a simple incremented sequence number for the product.
    • When users join the chatroom, they are given a 60 message history.   These messages may not contain the <x> payload in the situation where the server is restarted.

<message to='enduser@server/laptop' type='groupchat' from=''>

<body>KARX issues RR8 valid 2013-05-25T02:20:34Z</body>

<html xmlns=''>

<body xmlns=''>KARX issues RR8 valid 2013-05-25T02:20:34Z</body>


<x xmlns='nwws-oi' cccc='KARX' ttaaii='SRUS83' issue='2013-05-25T02:20:34Z' awipsid='RR8ARX' id='10313.6'>


SRUS83 KARX 250220










Four character issuing center


The six character WMO product ID


ISO_8601 datetime in UTC


The six character AWIPS ID, sometimes called AFOS PIL.


This is an unique identifier, see below.

The United States Government makes no warranty, expressed or implied, as to the usefulness of the software and documentation for any purpose. The U.S. Government, its instrumentalities, officers, employees, and agents assume no responsibility (1) for the use of the software and documentation listed, or (2) to provide technical support to users. 

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System is monitored 24x7

Please notify
OMB Tech Control ( about any issues. 

Most responses will occur during regular business hours
Monday – Friday (9am – 5pm ET).

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Access Information

  • Domain Names:
    College Park:

  • Gajim Reader

  • Thunderbird Reader

  • Pidgin Reader

  • NWS issued User_ID and password required for NWWS-OI. (NWWS-OI Request). 

    • Both credentials are case-sensitive and can only be used on one computer at a time

    • Multiple use on the same system will create an access error.

  • No user credentials are needed for NWWS-Satellite PID201.
    (See Hardware requirements and configuration for equipment details).

  • Please note, for NWS Credentials, depending on volume of requests there may be a wait of up to 30+ days depending on active server location.

  • Due to an update issue, users may experience random disconnects or account authentication errors.  Please be patient, these issues eventually self-correct.  Some systems may time out attempting to connect; if this happens wait 30-minutes and then attempt to reconnect.

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  • Welcome Letter
  • Mission
  • History
  • NWWS Description
  • NWWS Configuration
  • Operational Poster
  • Hours of Operation / Availability
  • NWWS-OI Set-up Information
  • User Options for Alerts and Warnings
  • Severe Weather Definitions
  • NWWS Products 
    (not all text products listed are available from all local weather forecast offices)

  • Contact Information
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Alert Information

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Special Needs

  • Some NWWS application software can be set up for “tone alert” notification(s), and text messages can be sent to braille printers.
  • Critical alerts and warnings are the same that are sent over local Emergency Alert Systems (EAS) and sent to Wireless Emergency Alert (WEA) capable telephones.

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  • During monthly transitions, some users lose connectivity with the NWWS-OI due to security firewall and DNS settings until the next transition.  Be sure to allow both IP addresses through security firewall(s).
  • During monthly transitions, users that lose connectivity should reset the NWWS-OI software application or restart their computer system to correct the problem.
  • There is currently an update issue where users may experience random disconnects or account authentication errors.  Please be patient, these issues eventually self-correct.  Some systems may time-out attempting to connect; if this happens wait 30-minutes and then attempt to connect to the NWWS-OI.

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Recommended Solutions

  • Please ensure the IP addresses are properly configured within your system and for your firewall access; 
    • NWWS-OI Boulder:
    • NWWS-OI College Park:
    • NWWS-OI can be served by either of the two domain names.
    • Users should make sure that their firewalls are open for both IP addresses that are behind the domain names, but should allow their DNS systems to determine which IP is the active server.
  • Reset system
  • For password issues and resets contact

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