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NOUS41 KWBC 211205
PNSWSH

Service Change Notice 17-18
National Weather Service Headquarters Silver Spring MD
805 AM EST Tue Feb 21 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:  Grid points change for the GFS 20km Pacific
  Region over NOAAPORT Effective March 22, 2017

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/Satellite Broadcast Network. This change will correct
the longitude 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_heade
r.out

Any questions, comments or requests regarding this
implementation should be directed to the contact below.

  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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