Search found 89 matches

by norulz
Sun Mar 26, 2017 12:07 pm
Forum: UEMS v15.x support
Topic: MICROPHYSICS: Lin et-al vs Ferrier
Replies: 4
Views: 1012

Re: MICROPHYSICS: Lin et-al vs Ferrier

Thanks for the suggestion. WSM5 is quite fast. Not as much as Ferrier but faster than Lin.
I will see if I get better precipitation forecasts next winter.
by norulz
Sun Mar 26, 2017 10:19 am
Forum: UEMS v15.x support
Topic: MICROPHYSICS: Lin et-al vs Ferrier
Replies: 4
Views: 1012

MICROPHYSICS: Lin et-al vs Ferrier

Hello all,

I tried the Ferrier Micro Physics scheme (MP_PHYSICS = 5) and found it to be about 10% faster than the default scheme, Lin et-al (MP_PHYSICS = 2).

What differences might I expect in the resulting forecast using Ferrier scheme with a single nested model at 12km/4km grids?

Thanks,
David
by norulz
Wed Mar 08, 2017 1:11 pm
Forum: UEMS v15.x support
Topic: gribinfo.conf for NOMADS Grib Filter
Replies: 6
Views: 1256

Re: gribinfo.conf for NOMADS Grib Filter

Ivan thanks a million!
It's working well.
David
by norulz
Wed Mar 08, 2017 12:44 pm
Forum: UEMS v15.x support
Topic: gribinfo.conf for NOMADS Grib Filter
Replies: 6
Views: 1256

Re: gribinfo.conf for NOMADS Grib Filter

....mmmmmm

I'm giving it a try

Thanks
by norulz
Wed Mar 08, 2017 9:50 am
Forum: UEMS v15.x support
Topic: gribinfo.conf for NOMADS Grib Filter
Replies: 6
Views: 1256

Re: gribinfo.conf for NOMADS Grib Filter

Hi Ivan,

I have not been able to make it work. The Prep routines add a 'dset' parameter to the end of the URL and the NOMADS server rejects this with any value as an invalid parameter.

Did you make any other tweaks to the Ptiles.pm script?
by norulz
Tue Mar 07, 2017 4:46 pm
Forum: UEMS v15.x support
Topic: gribinfo.conf for NOMADS Grib Filter
Replies: 6
Views: 1256

Re: gribinfo.conf for NOMADS Grib Filter

Hi Ivan,

Thanks for the details. I'll give it a try ASAP.

David
by norulz
Tue Mar 07, 2017 11:39 am
Forum: UEMS v15.x support
Topic: gribinfo.conf for NOMADS Grib Filter
Replies: 6
Views: 1256

gribinfo.conf for NOMADS Grib Filter

Hi all,

Is it possible to set up a gribinfo.conf file to use the NOMADS grib filter system? This would need to be set to a preset lon/lat and the required variables.

I would like to use such a possibility as a fallback on the ptiles system.

Thanks,
David
by norulz
Tue Mar 07, 2017 11:24 am
Forum: UEMS v15.x support
Topic: About DFI
Replies: 2
Views: 906

Re: About DFI

Hi Luis,

I use TDFI (DFI_OPT = 3) on all my operational runs and it does a good job of removing start up artefacts.
My outer domains are 12km with 4km nests.
The "price" is only about 5 minutes added to the run times.

David
by norulz
Thu Feb 23, 2017 10:08 pm
Forum: Hardware for running WRF / EMS
Topic: UEMS CPU suggestion
Replies: 4
Views: 1967

Re: UEMS CPU suggestion

Hi, I'm using 12GB RAM in each box and find that this is enough. 3 x 2GB for each CPU i.e 1 memory card for each channel. I had a reduction in speed when I used 16GB as it required 2 cards in one of the memory channels which slowed things down. Sure, let's do a comparison. We can use the benchmark c...
by norulz
Thu Dec 15, 2016 8:29 pm
Forum: UEMS v15.x support
Topic: WRF initializing WRF vs nesting
Replies: 3
Views: 926

Re: WRF initializing WRF vs nesting

Hi, Thanks for the observation. Adding boundary conditions at every time step should definitely provide better simulation. It may, however actually be slower. My motivation for exploring the option of WRF separate runs stems from looking for better economy in covering much of the Mediterranean with ...