NOUS41 KWBC 301937



Public Information Statement

National Weather Service Headquarters Washington DC

338 PM EDT Thu May 30 2013


To:        Subscribers:

           -Family of Services

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS Partners, Users and Employees


From:      Rebecca Cosgrove

           Acting Chief, Production Management Branch

           NCEP Central Operations


Subject:   Comments Sought on Evaluation of WCOSS Output Data

           by June 28, 2013


The National Centers for Environmental Prediction (NCEP) is in

the process of transitioning the NCEP Production Suite from the

current operational high performance supercomputers to the new

Weather and Climate Operational Supercomputing System (WCOSS). 

The transition to the WCOSS systems, named Tide and Gyre, is

slated to occur in July 2013.


As part of this transition, NCEP is making the output from the

WCOSS runs of the NCEP Production Suite available to the public

for evaluation. Please review the data and provide your feedback.


The GRIB, BUFR and text output is available for download at:


Imagery of the model output from a MAG-like website is online at:


Please send your feedback or questions to:


Please note the following:


-    The output from the models will not be identical between the two

machines.  This is due to significant machine differences and input

data differences due to timing of data arrival.

-    The WCOSS systems are in an active transition mode.  Output may not

be available every cycle due to ongoing testing.

-    The NCEP Production Suite on WCOSS is still being transitioned,

and the models are still being fine tuned so product delivery times

are not necessarily be representative of the final operational delivery times.

-    There will be some differences in product content or format with the output

from the WCOSS.  These differences will be outlined in the TIN announcing the

transition, but a preliminary list is available at:


The Eebpage above also addresses some of the reasons behind the

model output differences.


For questions regarding this announcement, please contact:


    Rebecca Cosgrove

    NCEP Central Operations

    College Park, Maryland


NWS National Technical Implementation Notices are online at: