[nws-changes] 20101108: comments-GEFS-Fwd: ADMIN NOTICE NOUS41 KWBC

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: [nws-changes] 20101108: comments-GEFS-Fwd: ADMIN NOTICE NOUS41 KWBC
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Mon, 08 Nov 2010 11:55:05 -0700

-------- Original Message --------

600
NOUS41 KWBC 081831
PNSWSH

Public Information Statement, Comment Request
National Weather Service Headquarters Washington DC
130 PM EST Mon Nov 8 2010

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

From:      John Ward
           Chief, Global Modeling Branch
           NCEP/Environmental Modeling Center

Subject:   Soliciting Public Comments through Dec 31, 2010
           on Modification of Product Dissemination Time of
           Global Ensemble Forecast System Products

The National Centers for Environmental Prediction (NCEP) is
proposing to upgrade the Global Ensemble Forecast System (GEFS)
in late 2011.  This upgrade would result in GEFS products being
distributed to the public up to 30 minutes later than the
current distribution time.  The NWS is seeking comments on this
proposed upgrade and resultant distribution schedule change by
December 31, 2010.

The proposed upgrades to the modeling system would be:

-Increased horizontal model resolution from T190 to T254 for
 forecast hours 0 to 192
-Increased vertical resolution from L28 to L42 for forecast
 hours 0 to 384
-Improved initial perturbations
-Improved stochastic total tendency perturbations

The benefits to the user community would be improved model
skill.

The delayed delivery time would affect all GEFS products
distributed through NOAAPORT, the NWS ftp server, the NCEP
ftp/http server, and NOMADS.  This GEFS upgrade might also
cause minor delays to the output of the GEFS Tracker Job, which
plots positions of cyclones, and the Global Ensemble Ocean Wave
products.

More details about the GEFS are available at:

  http://www.emc.ncep.noaa.gov/GEFS/

At the close of the public comment period, NWS will evaluate
the comments to determine whether to proceed with this upgrade
to the GEFS as planned. A Technical Information Notice will be
issued containing the implementation date and more details
about the upgrade and resultant product delays.

Please send comments on this proposal to:

LCDR Chad Cary
Executive Officer
NWS/NCEP Environmental Modeling Center
5200 Auth Road
Camp Springs, MD 20746
301-763-8000 x7704
Chad.Cary@xxxxxxxx

National Public Information Statements are online at:

http://www.weather.gov/os/notif.htm

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