National Weather Service United States Department of Commerce

Strong Winds Over Portions of the Rockies & Plains; Chilly for Much of the Eastern U.S.

Low pressure pushing eastward will generate strong winds over parts of the Rockies and Plains through Saturday with some light precipitation. Meanwhile, a much cooler air mass will overtake the eastern half of the country with frost and freeze concerns. Elevated fire weather conditions are expected for the Great Basin and parts of California, along with poor air quality in some locales. 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



Network Maintenance on October 22, 2020, to Affect Dissemination of Tsunami Products 

10/19/2020 ISCS-0210

Add Product Identifiers for RVFs at MARFC
10/14/2020 2020 HRIT/EMWIN User Survey

The purpose of this survey is to get a more accurate picture of the High Rate Information Transmission/Emergency Managers Weather Information Network (HRIT/EMWIN) Users’ capability footprint and what sources are being utilized to retrieve their environmental data.

9/30/2020 PNS 20-70

Soliciting comments through October 30, 2020, on potential changes to Tsunami Advisory text product formats.
9/30/2020 PNS 20-69

Se solicitan comentarios hasta el 30 de Octubre de 2020 para posibles cambios en el texto de los formatos de los productos de Advertencia de Tsunami.
9/29/2020 Fall 2020 Solar RFI predicted times

Solar RFI is expected to impact GOES-14/15/16/17 Imager Data plus Ancillary Services (GVAR, SAR, LRIT, EMWIN, DCS, GRB, etc.).
9/25/2020 PNS 20-68

Network Maintenance on September 28, 2020, to Affect Dissemination
of Tsunami Products

9/24/2020 SCN 20-86

Outage of some NWS Products on SBN/NOAAPort and NWS Web Services for Planned Maintenance Effective date: September 28, 2020

9/24/2020 PNS 20-67

Soliciting comments through October 30, 2020 for potential changes to
Tsunami Advisory text product formats.

GNC-A User Group Webinar #7

SAVE THE DATE | GNC-A User Group Webinar #7
September 24, 2020 @ 2:00PM EDT (18:00 UTC)

Contact: Natalia Donoho

09/08/2020 PNS 20-65

National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to take place on September 10, 2020 

PNS 20-64

NWS to issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on September 8, 2020



Add WFO Corpus Christi TX (CRP) Regional Weather Roundup (RWR) to EMWIN

08/07/2020 ISCS-0208A

WFO Honolulu to add
Marine Forecast Matrix
08/05/2020 PNS20-60

NWS to issue National
Tsunami Warning Center
Routine  Communications
Tests for the East and
Gulf Coast on  August 7,

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