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Technical Implementation Notice 10-62
National
Weather Service Headquarters
321 PM EST Wed Dec 15 2010
To: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
-NOAAPORT
Other NWS Partners, Users and Employees
From: Timothy McClung
Chief, Science Plans Branch
Office of Science and Technology
Subject: Change to GRIB encoding of WAFS products:
Effective March 1, 2011
Effective
Tuesday, March 1, 2011, beginning with the 1200 Coordinated Universal Time
(UTC) run, the National Centers for Environmental Prediction (NCEP) will modify
the GRIB encoding of the GRIB2 World Area Forecast System (WAFS) products
generated from the Global Forecast System (GFS).
In the
GRIB2 products, Section 1, Identification Section in the GRIB message, Octet
10, which indicates the WMO GRIB Master Table used to encode the data, will be
changed from 2 to 6. This change indicates
that the products will be encoded and should be decoded using Master Table
version number 6. This change will occur
only in the WAFS products, which are disseminated through the International
Satellite Communications System (ISCS), and the World Area Forecast System
Internet File System (WIFS). This change
will not affect any other NCEP GRIB2 products, GRIB1 products, or any products
on NOAAPORT.
More
information about how NCEP encodes products in GRIB2, including the WMO GRIB
Master Tables, is available at:
http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc.shtml
For
questions regarding these changes, please contact:
Bradley Mabe
NCEP/Central
Operations
301-763-8000
x 7715
Rebecca
Cosgrove
NCEP/Central
Operations
301-763-8000
x 7198
NWS
National Technical Implementation Notices are online at:
http://www.nws.noaa.gov/os/notif.htm
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