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The US National Weather Service "International Services and Communication Systems" (ISCS) activity is a collective group of message dissemination systems used to provide weather, water and climate information to segments of the World Meteorological Organization (WMO) International community as described in WMO document No. 386 - Manual on the Global Telecommunication System. The ISCS systems provide service to WMO Regional Association IV (RA-IV) and are managed by the US National Weather Service (NWS) Dissemination Systems Branch (W/OPS17); they include:

  • GTS Internet File Service (GIFS)
  • GeoNetCast - Americas (GNC-A)
  • Emergency Managers Weather Information Network (EMWIN)

ISCS systems are an integral part of the RA-IV Regional Meteorological Telecommunications Network (RMTN), which focuses on the timely collection and delivery of both time-critical and routine watches, warnings, observations and forecasts.

Additional telecommunication systems are identified as part of the RA-IV RMTN which supplement the capabilities of the ISCS systems for the exchange of messages. These other systems include:

  • Secure Socket Layer Virtual Private Network (SSL VPN) / NWSTG FTP Ingest Server [RTH Washington System]
  • Email Data Input Service (EDIS) [RTH Washington System]
  • WAFS Internet File Service (WIFS) receive service [WAFC Washington System (FAA/ICAO)]

ISCS Notification



Product Correction to RC ISCS-0104

8/7/2015 ISCS-0108

Add Panama BUFR products - GNC-A and GIFS
8/5/2015 ISCS-0107

Product Correction to RC ISCS-0091and RC ISCS-0093 for GIFS and GNCA
7/21/2015 ISCS-0106

Add Antigua and Barbuda BUFR products to  GNC-A and GIFS
7/13/2015 ISCS-0105

Addition of REC Service/Products for Columbia and St. Louis, Missouri.



Add JTWC Products to EMWIN Baseline
7/8/2015 ISCS-0103

Add Saint Lucia BUFR data to GNC-A and GIFS


Add Climate/RER Products for WFO Pittsburgh, Pennsylvania (PBZ) - EMWIN
6/30/2015 ISCS-0102

Add FOS Products to GNC-A and GIFS
6/22/2015 ISCS-0101

Add Recreational Product for Morristown, TN - EMWIN


Change Anchorage Airport Product AWIPS ID - EMWIN


Remove WARN products from non-WARN folders - GNCA


Remove WARN products from non-WARN folders - GIFS

ISCS Network

SSL-VPN Email Data Input Service (EDIS) Aviation Weather (WIFS) GeoNetCast Americas (GNC-A) EMWIN Antigua Bahamas Barbados Belize Costa Rica Curacao El Salvador Jamaica St. Lucia Trinidad GTS Internet File Service (GIFS) AWC Kansas City Guyana