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Re: [conduit] conduit gfs

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  • Subject: Re: [conduit] conduit gfs
  • Date: Wed, 27 Mar 2013 10:28:09 -0400
Patrick,
It's not the lack of glue.  The helicity is not there.  It was removed during a change to the GFS in May 2012.  The full TIN is available at :http://www.nws.noaa.gov/os/notification/tin12-22gfs_hybridaab.htm  but the part of interest to you is this wording:

1km helicity will be removed from the 0.5, 1 and 2.5 degree pressure GRIB files.  This field was added to these files by mistake during a previous implementation.



Becky Cosgrove
NCEP Central Ops

On 3/27/2013 9:42 AM, Patrick L. Francis wrote:

Something has changed with conduit GFS =-O

in October 2011, 0-1km helicity was included in the conduit stream and decoded by gempak.

note gdinfo from 2011:

http://modelweather.com/files/grids/gfs/006_2k11.txt

45 111005/0000F006 1000  0 HGHT HLCY


yet this morning when i went to use the grid it isn't there :'(

note gdinfo from this morning:

http://modelweather.com/files/grids/gfs/006.txt

Has anyone else noticed the same thing, or did I just pick the wrong day to quit sniffing glue :-)


cheers,

--patrick