Search found 95 matches

by norulz
Sat Oct 31, 2015 6:21 pm
Forum: EMS v3.4 support
Topic: Segmentation fault with gfsp25ptiles but not with gfsptiles
Replies: 2
Views: 4360

Segmentation fault with gfsp25ptiles but not with gfsptiles

One of my domain sets is suddenly but now consistently crashing in the first seconds of a run with segmentation fault reported. I changed the prep dataset from gfsp25ptiles to gfsptiles and all is now working fine. Interestingly the other domain sets are still happy with gfsp25ptiles. Is anyone else...
by norulz
Tue Jun 30, 2015 9:27 am
Forum: Hardware for running WRF / EMS
Topic: How to activate hyperthreading on wrfems
Replies: 8
Views: 8842

Re: How to activate hyperthreading on wrfems

Hi,

Interesting!

Did you benchmark the same domain without hyperthreading?
i.e with 11 cpus?


David
by norulz
Mon Jun 29, 2015 9:30 am
Forum: General NWP, Postprocessing, Meteorology
Topic: Can gusts be less than 10m wind?
Replies: 2
Views: 3425

Re: Can gusts be less than 10m wind?

Hi, According to the emsupp_cntrl.parm file, gust is a 10m value. The code that is given is 180, 105, 10 which implies the 'specified height' to be 10m. I am beginning to suspect that the timing of the calculation is the issue as I see that the gust value is more behind the wind value when the wind ...
by norulz
Sun Jun 28, 2015 11:00 am
Forum: General NWP, Postprocessing, Meteorology
Topic: Can gusts be less than 10m wind?
Replies: 2
Views: 3425

Can gusts be less than 10m wind?

Hello, Using NMM I have noted that on occasion, the speed of SFC WIND GUST is actually less (by 1-2kt) than the wind speed calculated from U&V vectors at 10m. The gusts are normally marginally higher to significantly higher than the 10m wind and the forecast is usually quite accurate. Is lower gusts...
by norulz
Sat Jun 27, 2015 2:06 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: Can I change kpds for GUST to 180, 1, 0 ?
Replies: 0
Views: 4321

Can I change kpds for GUST to 180, 1, 0 ?

Hello all, WRF post processor gives SFC WIND GUST the field code of 180, 105, 10. Grib users with zyGrib reader are not able to view wind gust as the reader requires 180, 1, 0 for surface wind gust. Is there any way to edit tables to change the code? Alternately is there any grib utility that can do...
by norulz
Fri Jun 26, 2015 1:45 pm
Forum: EMS v3.4 support
Topic: Exaggerated Rain Forecast with NMM
Replies: 0
Views: 3990

Exaggerated Rain Forecast with NMM

Hello all, I run a daily 12km with a 4km nest of the East Mediterranean and I am getting rather exaggerated forecasts for rain which is usually rare at this time of the year. (The amounts of precipitation forecast are small). Does anyone have any recommendations regarding tweaking my physics setting...
by norulz
Thu May 28, 2015 4:39 pm
Forum: EMS v3.4 support
Topic: NMM crashes with gfs 0.25 but not with 0.5
Replies: 6
Views: 4919

Re: NMM crashes with gfs 0.25 but not with 0.5

Thanks!
I'll change back over to 0.25 deg.
David
by norulz
Wed May 27, 2015 9:57 am
Forum: General NWP, Postprocessing, Meteorology
Topic: About datasets
Replies: 6
Views: 5575

Re: About datasets

Hi Luis, It depends if you have the latest version. Take a look in the ~/wrfems/conf/grib_info folder at the xxxxx_gribinfo.conf files. It is the first part of the name (i.e. xxxx) that counts and is used with the ems_prep command line option --sfc. In my installation I have 4 options - ssthr, sstpt...
by norulz
Tue May 26, 2015 6:20 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: About datasets
Replies: 6
Views: 5575

Re: About datasets

Hi,

I'm using ssthr for sst data using the following argument in the ems_prep command

Code: Select all

--sfc ssthr
or

Code: Select all

SFC = ssthr
in ems_autorun.conf.

I have not compared model output with or without sst. I assume it is doing the job.

David
by norulz
Fri May 22, 2015 10:29 pm
Forum: EMS v3.4 support
Topic: NMM crashes with gfs 0.25 but not with 0.5
Replies: 6
Views: 4919

NMM crashes with gfs 0.25 but not with 0.5

I have been experiencing seg faults in 3 different models with resolutions of 9:3 and 12:4 kms. The crashes always occur within 15 seconds of a mod 3 == 0 hour into the simulation (as soon as 9hrs and up to 75hrs). Reruns with the same initialization data always crash at exactly the same point. I ha...