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Re: [ldm-users] [conduit] GFS change at 1200 UTC 25 September?

  • To: chiz@xxxxxxxx
  • Subject: Re: [ldm-users] [conduit] GFS change at 1200 UTC 25 September?
  • From: David Knight <knight@xxxxxxxxxxxxxxxx>
  • Date: Fri, 28 Sep 2007 18:48:39 +0000 (GMT)
But that notice

http://www.nws.noaa.gov/om/notification/tin07-59gfs_upgrade_unifiedpost.txt

says:

"THE PRIMARY IMPACT TO CUSTOMERS RECEIVING THE GFS WILL BE THAT 
THE DEFAULT PRECIPITATION TYPE ALGORITHM WILL CHANGE"

and further

"THE PRODUCTS/GRIDS WHICH ARE DISSEMINATED TO NOAAPORT AND/OR THE 
SATELLITE BROADCAST NETWORK /SBN/ WILL NOT BE CHANGED IN VOLUME 
OR CONTENT."

So there appears to be more to this than that . . .

David


"> Harry,
> 
> NCEP posted a notice regarding change in the GFS postprocessor
> coincident
> with the 12Z Sep 25 run:
> 
> http://www.nws.noaa.gov/om/notification/tin07-59gfs_upgrade_unifiedpost.txt
> 
> 
> Steve Chiswell
> Unidata User Support
> 
> 
> On Fri, 2007-09-28 at 10:01 -0700, Harry Edmon wrote:
> > I have had a couple of users complain about changes in the GFS data 
> > starting with the 1200 UTC run on 25 September.  I notice there is a 
> > jump up in the size of the gempak files starting with that run.  Does 
> > anyone know of any changes?  If you are curious about what I am talking 
> > about, look at this page, which uses the 0.5 degree data:
> > 
> > http://www.atmos.washington.edu/~hakim/loop.psp?url=~hakim/tropo/theta/
> > 
> > Start the loop and look at the areas in white go from smooth to noisy 
> > with the 1200 UTC 25th run.  Another user is now having problems with 
> > his WRF initialization that he did not have before this.
> > 
> > 
> > _______________________________________________
> > conduit mailing list
> > conduit@xxxxxxxxxxxxxxxx
> > For list information or to unsubscribe, visit: 
> > http://www.unidata.ucar.edu/mailing_lists/ 
> -- 
> Steve Chiswell <chiz@xxxxxxxxxxxxxxxx>
> Unidata
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> ldm-users@xxxxxxxxxxxxxxxx
> For list information or to unsubscribe,  visit: 
> http://www.unidata.ucar.edu/mailing_lists/ 
> 



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