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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:

  • NWSTG FTPS 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



Transition of GeoNetCast Americas to new satellite uplink system.



Update WFO-SJU Baseline - EMWIN

WFO San Juan has requested the EMWIN baseline be updated to assure correct distribution of its products.


SCN15-55: Amended: Transfer of Tsunami Products for Puerto Rico and Virgin Islands from National Tsunami Warning Center (NTWC) to the Pacific Tsunami Warning Center (PTWC) Effective on a date to be determined (TBD).

SCN15-55: Transfer of Tsunami Products for Puerto Rico and Virgin Islands



Discontinuation of the WMO/WMC and ALERT Sub-Channels from GNC-A.


Topic: GOES-15 (GOES-West) East/West Maneuver scheduled for March 15, 2016

Date/Time Issued: March 14, 2016 2015 UTC

Product(s) or Data Impacted: GOES-15 (GOES-West) Imager and Sounder Data

Date/Time of Initial Impact: March 15, 2016 2330 UTC

Date/Time of Expected End: March 15, 2016 2340 UTC

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Add Curacao Radar Product to GNCA and 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