665
NOUS41 KWBC 281600
PNSWSH

Service Change Notice 24-60
National Weather Service Headquarters Silver Spring MD
1200 PM EDT Thu May 28 2024

To:   Subscribers:
   -NOAA Weather Wire Service
   -Emergency Managers Weather Information Network
   -NOAAPort
   Other NWS Partners, Users and Employees

From:   Ben Kyger
   Director
   NCEP Central Operations

Subject:   New Data Available Publicly on NCEP Web Services;
   GFS, GDAS, and RAP BUFR Observations and US Navy
   HYCOM: Effective May 22, 2024

Effective on May 22nd, 2024 the National Weather Service added data
products to their NCEP Web Services which include (1) an upgrade to
the
Observation Processing (ObsProc) software package to include high
resolution (temporally and spatially) satellite wind observations and
Binary Universal Form for the Representation (BUFR) formatted high
resolution upper air radiosonde profiles, (2) removal of 0-byte
sevcsr
files and (3) add the US Navy Hybrid Coordinate Ocean Model (HYCOM)
products.

1) ObsProc v1.2 additions
Data will be available under the corresponding model subdirectory:

https://nomads.ncep.noaa.gov/pub/data/nccf/com/obsproc/prod/
https://ftpprd.ncep.noaa.gov/data/nccf/com/obsproc/prod/
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/obsproc/prod/

a) The new observations and corresponding BUFR dump files generated:

 - GFS and GDAS *satwhr*.bufr_d

It includes:
i) High temporal resolution (15-20 min) National Environmental
Satellite,
Data, and Information Service (NESDIS) generated satellite
Atmospheric
Motion Vectors (AMVs) over CONUS
ii) Hurricane tailored high spatial and temporal resolution satellite
AMVs
over the domain of Tropical cyclones activity (a seasonal product)

 - GFS, GDAS, and RAP *uprair*.bufr_d
BUFR formatted high resolution upper air radiosonde profiles

 - GFS gfs.tCCz.TYPE.tm00.bufr_d
Where TYPE is BUFR formatted files *ahicsr*, *crisf4*, *crsfdb*,
*gsrasr*,
*gsrcsr*, *omi*, *ompslp*, *ompsn8*, *ompst8*, *satwhr*, *sevasr*,
*uprair*

 - GDAS gdas.tCCz.TYPE.tm00.bufr_d
Where TYPE is BUFR formatted files *ahicsr*, *avcsam*, *avcspm*,
*crsfdb*,
*gsrasr*, *gsrcsr*, *omi*, *ompslp*, *ompsn8*, *ompst8*, *satwhr*,
*sevasr*, *uprair*

- RAP rap.tCCz.TYPE.tm00.bufr_d
Where TYPE is BUFR formatted files *gsrasr*, *gsrcsr*, and *uprair*

b) Updated contents in prepbufr files for:

 - GFS, GDAS and RAP *prepbufr*.nr
The *uprair* observations will be added to the prepbufrs Automated
Data
Processing Upper Air (ADPUPA) component.

All of the above new and updated BUFR dump files will be generated at
the
temporal frequency of the existing observational products. (CC is the
analysis time)

NCEP encourages users to ensure their processing is flexible to
adequately
handle the new data, as well as increased file sizes for prepbufr
datafiles. Even though content within the files has changed,
downstream
file readers should not need to change in response.

2)  Removal of GFS and GDAS *sevcsr* buffer files

The following zero (0) bytes files will no longer be sent to their
corresponding ObsProc directories:
    gfs.tCCz.sevcsr.tm00.bufr_d
    gdas.tCCz.sevcsr.tm00.bufr_d
Where CC is 00, 06, 12, 18

3) Navy HYbrid Coordinate Ocean Model (HYCOM)

Data will be available here:

https://nomads.ncep.noaa.gov/pub/data/nccf/com/navo/prod/
https://ftpprd.ncep.noaa.gov/data/nccf/com/navo/prod/
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/navo/prod/

    hycom_glb_regp01_YYYYMMDD00_tfff.nc.gz
    hycom_glb_regp06_YYYYMMDD00_tfff.nc.gz
    hycom_glb_regp07_YYYYMMDD00_tfff.nc.gz
    hycom_glb_regp17_YYYYMMDD00_tfff.nc.gz
    hycom_glb_sfc_u_YYYYMMDD00_tfff.nc.gz

Where YYYYMMDD is the forecast date and fff is the forecasted hour.

Any questions, comments, or requests regarding this implementation
should
be directed to the contacts below. We will review any feedback and
decide
whether to proceed.

For any comments/feedback on the BUFR dump file upgrade at the
Environmental Modeling Center (EMC), please contact:

Dr. Daryl Kleist
Chief, Data Assimilation and Quality Control Group
NCEP Environmental Modeling Center
College Park, MD
Email: daryl.kleist@noaa.gov or obsproc_support@noaa.gov


For questions regarding the data flow aspects, please contact:

Margaret Curtis
NCEP Central Operations Dataflow Team
ncep.pmb.dataflow@noaa.gov

National Service Change Notices are online at:

https://www.weather.gov/notification