NOAA Weather Wire Service (NWWS)

Service Status As Of
NWWS Satellite    
NWWS Open Interface (OI)    




Please Note:

The National Weather Service telecommunications dataflow will be switching to a backup site on July 17th between 1200 and 1500 UTC (0800 EDT to 1100 EDT).

NWS Telecommunications dataflow will switch back to the primary site on July 22nd between 1200 and 1500 UTC.

These switches may or may not cause data or signal loss depending on your system(s) configuration; Open Interface, Satellite Channel 201, or both. The switches will not be done if a Critical Weather Day is declared and will be rescheduled.

Please e-mail if after a restart your system fails to receive the NWWS dataflow.



May, 2019

  • Updated webpages.
  • Monday, May 6, at 1015 EDT (1415 UTC) NWS AWIPS/NCF will switch to backup site (BNCF). This should be a seamless transition for NWWS products (with no change being required from users). If there is product loss please e-mail
  • Tuesday, May 21, 2019, NWS return to normal operation from the ANCF; planned to occur at 1015 EDT (1415 UTC).

April, 2019

  • Updated webpages.
  • The End User Client (EUC) will not be updated to include: addition or
    deletion of product types; changes required for current WINDOWS or
    LINUX operating systems; or JAVA version compatibility.
  • Compatible software is available from commercial sources and may
    be found when searching for "NWWS software".
  • The EUC request and requirement tabs and the EUC sourced webpage
    have been removed.

March, 2019

  • Updated webpages.
  • Please Note: can be served by either of the following two IP addresses.
    • Primary:
    • Backup:

  • Users should ensure that firewalls are open for both IP addresses, but still allow DNS systems to determine which IP is the active server.

    When necessary NWS will notify users when to switch to NWWS backup.

Mission Statement

The mission of the NWS Dissemination Systems Branch is to disseminate weather information, alerts, and warnings to NWS partners, federal, state, and local emergency managers, and the public as quickly and accurately as possible.

The NWS Enterprise NWWS was designed to meet this mission.

NWWS (using both Internet Open Interface and SBN/NOAAPORT Channel 201 in concert) provides the highest product availability to the user.

NWWS is one method used by radio and television broadcasters to activate the local Emergency Alert System (EAS).


The National Weather Service(NWS) Enterprise NOAA Weather Wire Service (NWWS) developed in 2014 consists of several NWS Enterprise systems (AWIPS, NCF, NCO/IDP, NIDS and SBN/NOAAPORT). See NWWS Poster

The Enterprise NWWS was declared operational July 1, 2015.

NWWS provides text formatted messages via both satellite (SBN/NOAAPORT Channel 201) and the Internet (Open Interface).

  • Receiving both Internet and satellite product streams allows the recipient to achieve a 98% product availability.
  • SBN/NOAAPORT Channel 201 (aka PID201) are NWWS - only alerts, warnings and weather information in WMO Standard message format.
  • NWWS-Open Interface (NWWS-OI) are NWWS-only alerts, warnings and weather information in XML/XMPP format and require additional information for access.

NWWS-OI access:
  • NWS issued user_ID and password. (see specific tab for each)
  • XMPP Chatroom interface/XMPP Reader (Java, Pidgin, etc.) - commercial application or user developed.

NOTE: No user_ID or password required for SBN/NOAAPORT satellite access; though the 1.2m (or larger) dish size may be a limitation for some users.

NWWS is one method used by radio and television broadcasters to activate the local Emergency Alert System (EAS).



To receive SBN/NOAAPORT Channel 201 requires:
  1. Satellite dish larger than 1.2m (minimum) for better reception (4.2m would offer the best reception)
  2. Low Noise Band (LNB) down converter (similar or better than Norsat 3220)
  3. DVB-S2 satellite receiver (similar or better than Novra S300)
  4. Windows-based PC with minimum 20GB storage and 3GB RAM
  5. Configure for SBN/NOAAPORT Channel 201 (NWWS products only) using CONFIGURATION sheet

To receive NWWS-Open Interface (OI) over the Internet requires:
  1. PC (Windows-7 or higher)
  2. 20 Gigabytes of memory for up to 60-day storage of all products
  3. 2 Gigahertz of greater multi-core processor
  4. NWS issued User_ID and password (see OI Request )
  5. XMPP Reader (i.e., Java, Pidgin, other XMPP application, etc) developed or via commercial provider.

Note: Additional programming is required with any XMPP reader in order to access the message details contained in the "stanzas" provided with each visible message header.


Open Interface(OI) supplemental information:

  1. User_id and Password are case sensitive (and cannot be used on multiple machines).
    To request click here.
  2. System and Network Firewall(s) may need adjustment.
  3. Port assignment is "5223".
  4. Router should be checked for proper configuration.
  5. Protocol: XMPP
  6. Address:
  7. Group: chatroom "nwws"

For XMPP program developers: NWS has implemented some security measures. Now applications accessing resources on need to provide a User-Agent header in any HTTP request. Requests without a user agent are automatically blocked. This policy is due to a small number of clients using resources far in excess of what most would consider reasonable.


Recommended format for the user agent string:


This will both uniquely identify your application and allow NWS to contact you if we observe abnormal application behavior that may result in a block.

Product Dissemination

Methods for Receiving NWS Alerts and Warnings
  Method Media Product Types Used to Activate
1 NWWS - SBN PID201 Satellite Filtered NWWS Products only Yes
2 NWWS - Open Interface (OI) Internet Filtered NWWS Products only Yes
3 NOAA Weather Radio (NWR) Radio Local Weather Forecast Office (WFO) Products Yes
4 SBN/NOAAPORT PID 101-108 Satellite All NWS Products; includes NWS alerts and warnings (unfiltered) Yes
5 Emergency Manager's Weather
   Information Network (EMWIN)
Satellite NWS Products & Imagery; includes NWS alerts and warnings No
6 Wireless Emergency Alerts (WEA)
Mobile Phone Alerts & Warnings only No
7 Interactive NWS (iNWS) - NOTE 1
Mobile Phone SMS Text alerts No
8 Internet All NWS Products No
9 Internet Alerts & Warnings only No
10 NWS-Chat - NOTE 1
Internet All NWS Products No
11 NWS Anonymous FTP


All NWS products including alerts and warnings

12 The International Justice and Public
   Safety Network (Nlets) -
Internet State specific products No

FEMA Integrated Public Alerts and
   Warning System (IPAWS) - NOTE 1

Internet Alerts and Warning in CAP v1.2 format Yes
14 Various Weather applications
   (variable cost; FREE to $$$$)
Internet/ Mobile Phone Alerts and Warnings No
15 County or Local Emergency Management Telephone alert, pager activation, e-mail or Text Message Provides additional local alert awareness/notification. No
16 RCA AlertGuard 27” Television (2003)


All local NWR broadcasts, alerts and warnings (Spanish and English text , tone, chime , interrupt and channel change capable)


NOTE 1 - this method has restricted access. Please review the appropriate web page for additional details.