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20020814: differences in ETA model grids

Kevin,

The decoded ETA 212 GEMPAK file has data from both the NOAAPORT braodcast as
well as that from the CONDUIT data stream (eg the 212 fields that are
available from the NCEP/NWS ftp server). The data on NOAAPORT is a smaller
subset.

Steve Chiswell


On Wed, 14 Aug 2002, Kevin Polston wrote:

> Hi Steve,
> 
> I was hoping you might be able to help me out here. I am currently
> downloading (via LDM) the ETA_212 grid. For comparison I have also
> downloaded the decoded ETA_212 grid from motherlode on a few occasions.
> I am getting differences in the output fields and I don't understand
> why....especially since it is supposed to be the same grid. For
> instance...the ETA_212 grid that I download via LDM will not have the
> 180:0 PDLY CAPE or CIN fields, nor does it have the 3000:0 HGHT HLCY
> field. However....the decoded file from motherlode does have these
> fields (and probably a few others I am not mentioning).  The ETA_212
> grid from motherlode also has the "new" fields...like the 0-1km SRH (ie,
> 1000:0 HGHT HLCY) but the files from LDM do not.  Why is there a
> difference here?
> 
> For your info....my pqact.conf file is set up like this to request the
> ETA:  
> 
> # NOAAport ETA grids
> # Grid #211 80km CONUS:    ^[YZ].Q.*/mETA
> # Grid #212 40km CONUS:    ^[YZ].R.*/mETA
> # Grid #215 20km CONUS:    ^[YZ].U.*/mETA
> # Grid #214 47.5km Alaska: ^[YZ].T.*/mETA
> # Select any/all grids desired from [QRUT]
> HRS   ^[YZ].[R].*/mETA
>       PIPE    decoders/dcgrib2 -d data/gempak/logs/dcgrib.log
>       -e GEMTBL=/usr1/nawips/gempak/tables
>       /usr1/nawips/metdat/gempak/grids/YYMMDDHH_eta_212.gem
> 
>  
> As far as I can tell I am getting the 212 grid. Is there another eta
> grid I need to get instead of the one I am currently getting?  Any help
> would be appreciated. Thanks.
> 
> Kevin
>