ISCS Header Image DOC Image


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

8/6/2014: ISCS-0067

RA-IV 2013 Tropical Cyclone Program Harmonization (TCP) on GNC-A

8/6/2014: ISCS-0066

RA-IV 2013 Tropical Cyclone Program Harmonization (TCP) on GIFS

8/6/2014: ISCS-0065

RA-IV 2013 Tropical Cyclone Program Harmonization (TCP) on EMWIN

7/30/2014: ISCS-0064
Add Tsunami Products in Spanish for the Pacific:

Ref DRG RC 14232

7/21/2014: The ISCS/GIFS file naming format for bulletin messages will be revised: See the following link for more information.

7/17/2014: ISCS-0063

7/14/2014: ISCS-0062
Add Tsunami Products in Spanish for the Pacific


ISCS-0052A Add PNG formatted CMO Radar Mosaic product to GIFS and GNC-A

Admended ISCS-0052


On or about Wednesday, June 18, 2014, the National Centers for Environmental Prediction (NCEP) will upgrade the Geophysical Fluid Dynamics Laboratory (GFDL) Hurricane Prediction System.

For more information see:

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