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PNSWSH

Service Change Notice 17-18 Updated

National Weather Service Headquarters Silver Spring, MD

1200 PM EST Wed Feb XX 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:

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

NWS National Service Change Notices are online at:

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