Hi Mike,
Thanks for the response and interest. The WMO source is KWBN, which is the
NDFD. My guess is that the products are related to this:
https://www.weather.gov/media/notification/pdf_2025/pns25-81_Experimental_OPC_High_Seas_Gridded_Fcsts_NDFD.pdf
wgrib2 isn't very helpful as my grib tables must be old. An example:
1:28:d=2026012112:var discipline=78 center=7 local_table=1 parmcat=1
parm=192:surface - surface:69 hour fcst:
daryl
________________________________________
From: Mike Zuranski <mike@xxxxxxxxxxxxxxxxxxx>
Sent: Wednesday, January 21, 2026 4:27 PM
To: Herzmann, Daryl E [AGRON]
Cc: LDM
Subject: Re: [ldm-users] Grib data in the IDS|DDPLUS feed
Hey Daryl,
I have to ask, did you bother to peak at the data to see what it actually is?
My hunch is model output but L products are strangely omitted from the
following table: https://www.weather.gov/tg/tablea So now I'm curious.
-Mike
On Wed, Jan 21, 2026 at 3:48 PM Herzmann, Daryl E [AGRON]
<akrherz@xxxxxxxxxxx<mailto:akrherz@xxxxxxxxxxx>> wrote:
Greetings,
I was reviewing my IDS|DDPLUS archival and noticed that my hourly files have a
large variance in size.
26M 2026012104.txt
390M 2026012105.txt
27M 2026012106.txt
...snipped...
30M 2026012116.txt
387M 2026012117.txt
27M 2026012118.txt
So I had a look at my LDM telemetry logging and see the the following byte
counts for IDS|DDPLUS for the 17 UTC hour today
wmo_ttaaii | sum
------------+------------
SDCN01 | 1700051333
LDUD00 | 34844596
LDUD06 | 34771861
LDUD12 | 34731012
LDUE00 | 34702011
LDUD18 | 34668540
LDUE06 | 34664366
LDUE12 | 34593737
LDUH12 | 34560734
LDUE18 | 34527322
LDUH06 | 34485257
LDUF06 | 34466943
LDUF00 | 34458010
LDUF12 | 34452545
LDUF18 | 34412543
LDUH00 | 34405475
LDUG18 | 34382563
LDUG00 | 34381983
LDUG06 | 34376450
LDUG12 | 34366267
LDUH18 | 16845611
Of course, the Canadian RADAR (SDCN01) is well known fun that I was already
excluding from the file write, but what is LDUD00? Well, it is grib data:
LDUD00 KWBN 211200
GRIB^@^@^A^B...
So folks may wish to update their pqact's to exclude these as well!
daryl
_________________________________________________________
NOTE: All exchanges posted to NSF Unidata maintained email lists are
made publicly available through the web. Users who post to any of the
lists we maintain are reminded to remove any personal information that
they do not want to be made public.
NSF Unidata ldm-users Mailing List
(ldm-users@xxxxxxxxxxxxxxxx<mailto:ldm-users@xxxxxxxxxxxxxxxx>)
For list information, to unsubscribe, or change your membership options,
visit: https://mailinglists.unidata.ucar.edu/listinfo/ldm-users/