National Weather Service United States Department of Commerce

Stormy Western U.S.

An active and complex weather pattern is in store this weekend through next week, as multiple storms track from West Coast to East Coast. The activity starts today as a vigorous system moves through north-central California into the Intermountain West with rain, perhaps a few thunderstorms and heavy mountain snow. This system will move into the Upper Midwest tomorrow with a swath of heavy snow. Read More >

RTH Washington Data Ingest:

The US NWS maintains Internet based services which allow designated meteorological data providers the capability to input weather bulletins to the National Weather Service Telecommunication Gateway (NWSTG) - also known as the Regional Telecommunication Hub (RTH).  A description of these services is provided at the following:

- NWS Web Bulletin Input Form
- FTP Input Service
- eMail Data Input System (EDIS)




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

12/16/2020 Re:  SCN 20-117 

The transition to the
Ridge2 service is on hold
due to the NWS declared "Critical Weather Day"
(CWD).  The CWD is
currently scheduled to
expire at 1800 UTC, 12/17/2020.  When the
CWD expires, the Ridge2 service will be
implemented.  The NWS
CWD status is available


12/15/2020 SCN20-117

Static Radar Image Files Temporarily Suspended on
EMWIN Services, Effective December 16, 2020
12/9/2020 ISCS-0212

Delete One Text Product for Miami, FL (MFL)
12/1/2020 ISCS-0211

Add Airport Weather Warning for Reno, NV (KRNO)
11/19/2020 PNS20-85

The NWS National Centers for Environmental Prediction (NCEP) is seeking public comments through December 18, 2020, on the management of user access of the NCEP Web Services.


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