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NOUS41 KWBC 231445 AAA
PNSWSH

Service Change Notice 17-18 Updated
National Weather Service Headquarters Silver Spring, MD
1045 AM EST Thu Feb 23 2017

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

From:  Dave Myrick
  Office of Science and Technology Integration

Subject:  Updated: Grid points change for the GFS 20km
  Pacific Region over NOAAPORT:
  Effective March 22, 2017

Updated to correct wording from longitude to latitude

The National Centers for Environmental Prediction (NCEP) is
making a fix to the Global Forecast System (GFS) model to
correct the number of points in grid 254, Pacific Region,
on NOAAPORT/SBN. This change will correct the latitude from
60N to 65N. The changes will be made starting with the
12 UTC cycle on Wednesday, March 22, 2017.

The NOAAPORT 20 km grid (id 254) for Pacific Region will be
modified to correct number of points from 692 to 725 on Nj
(number of points along Y-axis). The grid id 254
specification will be as follows:

Current -
 grid_20km_pac="10 6 0 0 0 0 0 0 837 692 -45000000
110000000 48 20000000 65720000 270000000 64 0 20000000
20000000"
New -
 grid_20km_pac="10 6 0 0 0 0 0 0 837 725 -45000000
110000000 48 20000000 65734500 270000000 64 0 20000000
20000000"

The NOAAPORT WMO headers for this change can be found here:
http://www.nco.ncep.noaa.gov/pmb/changes/downloads/gfs_pac_
header.out

Any questions, comments or requests regarding this
implementation should be directed to the contacts below. We
will review any feedback and decide whether to proceed.

  Carissa Klemmer
  NWS/NCEP Central Operations Dataflow Team
  College Park, MD
  ncep.list.pmb-dataflow@noaa.gov

NWS National Service Change Notices are online at:

http://www.nws.noaa.gov/os/notif.htm


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