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[IDV #NTF-360680]: NDFD Grids

Hi Brendon,

re:
> I'm interested in using either IDV or Gempak to create realtime NDFD Max
> & Min Temperature 12/24/36 hour forecast maps (to replace our legacy NGM
> MOS temperature maps).  If I use the Data Chooser in IDV to select the
> Latest NWS NDFD 5km CONUS from Motherlode, the only four times available
> are for instances way out in the future (running on 11/4 at 17Z, only
> times available are 11/9 to 11/12 12Z for Max Temps ).  My Gempak grid
> files ingested via IDD (located in /.../data/gempak/model/ndfd) have a
> similar issue.

I have looked through the log files generated by our NOAAPort ingest system
for the NWSTG2 channel of NOAAPort.  The earliest forecast hour I found
for NDFD grids was +84.  This agrees with your observation about the holdings
on motherlode.ucar.edu and on your own NOAAPort ingester.
 
> According to http://www.nws.noaa.gov/ndfd/technical.htm the max/min
> temperature grids should be for every 24 hours out to 168 hours.

I did not see anything in this page that states that all of those products
are/should be available in NOAAPort.

> I'm
> wondering if there is an actual problem with the way the NDFD grids are
> being populated into IDD/Motherlode, or if I am simply misunderstanding
> the documentation as to what should be available.

I do not see any indications that there are errors in processing GRIB2 messages
being delivered in the NOAAPort NWSTG2 channel.  The contents of this of NWSTG2
are packaged into the IDD NGRID datastream; presumably this is where you are
finding the NDFD grids for forecast days 3.5+ (84 hours+).

> To me, I would think
> that the NDFD grid files should have many more times available,
> especially times much closer to the actual issuance of the product.

I agree.  The URL you provided suggests that the products should be made 
available
every three hours with LOTS more forecast hours than what we are seeing.

> Any help, suggestions, or alternatives are greatly appreciated.

I will keep digging into this to see if I can learn anything concrete.

Cheers,

Tom
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Ticket Details
===================
Ticket ID: NTF-360680
Department: Support IDV
Priority: Normal
Status: Open