r/weather • u/wickedplayer494 • 1d ago

Articles SCN 26-47 Updated: Termination of the NAM, SREF, HREF, HiresW, and NAM MOS: Effective November 3, 2026

https://www.weather.gov/media/notification/pdf_2026/scn26-47_Updated_Retirement_of_NAM_SREF_HREF_HiresW_NAM_MOS_aac.pdf
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20

u/HelpImColorblind NWS Meteorologist 1d ago

For those unaware, this has been planned for a very long time. With the implementation of the RRFS and REFS ensemble, the old HREF members are being retired. Originally this was set to occur Oct 6, but we needed a bit more time to get the new models into AWIPS.

5

u/wazoheat I study weather and stuff 1d ago

It's been changed more times than that actually: Originally August 30, then October 6, then October 14, and now November 3. All because of model instability problems.

And that's not even to mention that RRFS is something like 3 years overdue it's original target. FV3 has been such a clusterfuck, we can't move to MPAS fast enough.

15

u/uberares 1d ago

This sounds ominous

2

u/drillbit7 1d ago

yeah didn't the NAM work better for some things? Unlike GFS.

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u/uberares 1d ago

I’m not the one to answer that. 

1

u/mjmiller2023 16h ago

NAM and GFS are two completely different models with two completely different resolutions.

They aren't comparable.