Accessing archived HYCOM 7-day forecasts (not best-time hindcast)

[최수원]

Dear communtiy,

I have been working with HYCOM hindcast data, specifically GLBy0.08/expt_93.0 (e.g.,

https://tds.hycom.org/thredds/dodsC/GLBy0.08/expt_93.0).

I understand that the hindcast files are provided as “best time” data.

For my research, I am interested in the original 7-day forecast fields as they were issued at the time (for example, forecast initializations with lead times such as t000, t024, …, t168), rather than the best-time hindcast.

Could you please let me know if these original forecast archives are available, and if so, how I might access them? Or are only the best-time hindcast products distributed to the public?

Any guidance on how to access these original forecast datasets would be greatly appreciated.

Thank you very much.

suwon

[Alan Wallcraft]

The full 192-hr forecast has been publicly released by the US Navy, but we only store them for a few days in near real time because of storage space constraints.

You can start downloading them every day and over time build up a time series going forward.

If you, or a collaborator, are working on an ONR project, you can access these files on the Navy DSRC archive server, for example:

st-vsm1.navydsrc.hpc.mil 102> pwd
/archive/home/ooc/data/hycom/ESPC-D-V02/decimated-hycom-glby008/202508
st-vsm1.navydsrc.hpc.mil 103> ll *3112_ts3z_t0111_t0192.tar.gz
-rw-r--r--. 1 ooc UMT 35292943183 Sep  1 12:59 US058GCOM-OPSbnc.espc-d-031-hycom_fcst_glby008_2025083112_ts3z_t0111_t0192.tar.gz

Alan.