National Weather Service United States Department of Commerce

Dangerous Heat Wave for the West; Severe Storms and Heavy Rain for Midwest and Plains

Severe storms and heavy rains are likely in the Upper Midwest and Plains through this evening. A long duration heat wave will build across the West through next week with excessive heat watches/warnings in effect from the Southwest to Northwest. TS Josephine is forecast to pass well north of Puerto Rico and the Virgin Islands while TS Kyle is forecast to move quickly away from land this weekend. 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

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, 2020
07/23/2020 ISCS-0207

Modification of various
WFO Guam AWIPS headers,
part 2.
07/02/2020 PNS20-50

Seeking comments through
August 2, 2020 on
proposed replacement of
RIDGE I radar webpage
with RIDGE II radar


Soliciting Comments on
Proposal to Change Small
Craft Advisory to Small Craft
Warning through
August 31, 2020



Soliciting comments through 
August 21, 2020, on proposed 
major changes to the NWS 
Watch, Warning, and Advisory 
(WWA) system.

Read more here:



NWS is Soliciting Feedback
from Specified Partner
Sectors on their Use of
NWS Tropical Products
and Services through
June 30, 2021. 

Read more here:



Announcing partner webinars
n June and July 2020, on
proposed major changes to
the NWS Watch, Warning and
Advisory (WWA) system

Read more here:

05/14/2020 ISCS-0206

Delete Obsolete Upper Winds Forecast (FB) Products

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