570
NOUS41 KWBC 271620 AAA
PNSWSH

Service Change Notice 24-65 Updated
National Weather Service Headquarters Silver Spring MD
1220 PM EDT Thu Jun 27 2024

To: Subscribers:
 -NOAA Weather Wire Service
 -Emergency Managers Weather Information Network
 -NOAAPort
 Other NWS Partners, Users, and Employees

From: Mike Farrar
 Director
 National Centers for Environmental Prediction

Subject: Updated: Upgrade NCEP Global Forecast System to
v16.3.16: Effective July 2, 2024

Updated to change implementation date from June 26, 2024 to July
2, 2024.

Effective on or about July 2, 2024, beginning with the 1200
Coordinated Universal Time (UTC) run, the National Centers for
Environmental Prediction (NCEP) will upgrade the Global Forecast
System (GFS) from version 16.3.15 to 16.3.16.

This GFS upgrade adds a new job, gdaswdqms, in the GFS Data
Assimilation System (GDAS).  It generates 6-hourly summaries of
observation reports, which contain information on time,
location, station identification, quality flag, and background
departure statistics (innovations) from GDAS analysis for
radiosonde, surface data over land, and marine data.  The
objective of this new job is to support the World Meteorological
Organization (WMO) Integrated Global Observing System, WDQMS
(WIGOS Data Quality Monitoring System) project and ensure that
WMO observational data and products are reliable and correspond
to agreed-upon needs.

The addition of GDAS WDQMS processing does not impact GFS
scientific results and existing products.  It adds the following
three WDQMS products in Comma-separated Values (CSV) format for
each 6-hourly analysis cycle (HH):

- gdas.tHHz.temp.csv
- gdas.tHHz.synop.csv
- gdas.tHHz.marine.csv

The WDQMS products will be available on the NOAA Operational
Model Archive and Distribution System (NOMADS) and FTPPRD web
services at the following locations:

https://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gdas.YYY
YMMDD/HH/atmos/wdqms
https://ftp.ncep.noaa.gov/data/nccf/com/gfs/v16.3/gdas.YYYMMDD/H
H/atmos/wdqms
ftp://ftp.ncep.noaa.gov/data/nccf/com/gfs/v16.3/gdas.YYYMMDD/HH/
atmos/wdqms

Please submit comments, questions, or requests on this upgrade
to:

Daryl Kleist
Chief, Data Assimilation Division
Modeling and Data Assimilation Branch
NWS/NCEP/Environmental Modeling Center
Email: daryl.kleist@noaa.gov

For questions regarding the data flow, please contact:

Margaret Curtis
NCEP Central Operations HPC Dataflow Team Lead (Acting)
College Park, MD
ncep.pmb.dataflow@noaa.gov

National Service Change Notices are online at:

https://www.weather.gov/notification/