NOAA Weather Wire Service (NWWS)

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

Note: NWS will be changing from primary to backup every month. This timeline may be delayed or extended based on holidays and declared Critical Weather Days (



NWWS-OI Requests

When signing up for new NWWS_OI Requests, User_ID resends, and password resets, there may be a delay due to critical weather days and other priority missions within NWS. NWS is working on improving the process; currently a call-in number will be provided after you submit your information. Thank you in advance for your patience.

Reminder: As originally designed and developed, the use of both the NWWS Satellite PID201 and the NWWS-OI provides the highest product availability in the event one product stream is affected or experiences an outage.



After September 16, 2019; The NWS will begin to implement the reformatting of Flash Flood Warnings (FFW) into Impact-Based Warning (IBW) format. This effort is a part of the overall NWS Hazard Simplification (Haz Simp) project. The impact-based FFW enhances NWS' Flash Flood Services by improving the consistency and clarity of the product formatting and by characterizing the hazard (flash flood), the source of the information (e.g., radar, gauge, trained spotter, emergency manager), and a brief description of the hazard impact.

The FFW IBW messages will include machine-readable tags to characterize the flash flood damage threat, source information, and causative event. There will be no change to the information included in the FFW segment header block, including the Valid Time Event Code (VTEC) and Hydrologic VTEC (H-VTEC) strings.

All NWS Weather Forecast Offices (WFO) will transition to issuing FFWs in IBW format by late November 2019.

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.