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HRRR in UEMS 19.5+ (WRF v4.1+)

Posted: Tue Sep 29, 2020 3:19 pm
by brainard92
I have had problems using HRRR for initial or boundary conditions since upgrading to UEMS 19.5.1 continuing with the current 20.8.1 version. The problem manifests in WRF REAL failing quickly on launch, always complaining about the psfc calculation:

* Creating initial and boundary conditions - Failed (1 - Death of Controlling Process or Hangup)
ERROR in psfc: flag_psfc = 1, flag_soilhgt = 1, flag_slp = 0, sfcp_to_sfcp = F
-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: <stdin> LINE: 1405
not enough info for a p sfc computation
-------------------------------------------

I've tried different domains, newly created domains in each uems version, using ptiles vs the full domain, verifying the PSFC and SOILHGT fields seem normal in the WPSPRD file, and tinkering with most settings in the domain's run_wrfreal.conf. Nothing has gotten through to successfully complete WRF REAL.

Anyone else seen this working with HRRR lately, or have any ideas how to tackle what seems to be a surface pressure calculation problem?

Re: HRRR in UEMS 19.5+ (WRF v4.1+)

Posted: Fri Oct 02, 2020 6:40 pm
by nathandm103
Yes I am having this same problem, have not used UEMS for a long time since, and am starting up again with version 20. But I am getting this exact same error no matter what I do. I also get a different error trying to use rap of "Hung process". Unfortunately I do not have any idea how to fix this, have you ever been able to use HRRR sucessfully in older versions?

Re: HRRR in UEMS 19.5+ (WRF v4.1+)

Posted: Mon Oct 05, 2020 8:34 pm
by nathandm103
brainard, please do let me know if you ever find a fix for this, Ill do the same. Really driving me crazy! I feel like I have checked everything that needs to be checked. Some of the threads I have seen online regarding non-UEMS wrf support have mentioned maybe an issue with the VTables, but I can find nothing helpful.

Re: HRRR in UEMS 19.5+ (WRF v4.1+)

Posted: Wed Oct 07, 2020 2:13 am
by nathandm103
I was able to get rid of the sfcp_to_sfcp error by changing "F" to "T" in the configuration for wrf_real, but I think it led to a 2nd problem, computer horsepower. I am pretty sure I am unable to get through execution of real due to insufficient computer resources.

Re: HRRR in UEMS 19.5+ (WRF v4.1+)

Posted: Thu Oct 08, 2020 8:31 pm
by brainard92
Sorry for the slow reply. I did try changing sfcp_to_sfcp to T in my static/namelist.real, but this did not change my result. When I looked back at the file after ems_run failed, I found it was reset back to F. I'm trying to dig through the weeds to see what is causing it to reset back to F, but haven't found it yet. Another uems user suspects the problem stems from the vertical coordinate changes in WRF V4.1+ (UEMS v19.5+), but we haven't found a solution.

To answer one of your preceding questions, I am still able to use HRRR on uems domains as of UEMS 19.4.1 (WRF v4.0.3). Until someone finds a solution to this problem in the current generations, I would advise you to try and rollback and work with that version. If I find a solution that works, I'll try and remember to post back here. I suspect, though, this will need to be addressed and patched by our benevolent UEMS overlord (Rob).

Re: HRRR in UEMS 19.5+ (WRF v4.1+)

Posted: Sat Oct 17, 2020 9:18 pm
by nathandm103
Thanks for the info on 19.4.1 as last successful HRRR runs! That is great to know.

Please let us know if you guys figure out the fix in the later releases for HRRR. Thanks for posting this.