Search found 102 matches

by norulz
Wed Feb 17, 2021 1:23 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: Best practices for dropping spinup time
Replies: 0
Views: 32

Best practices for dropping spinup time

Hi all, If I wish to drop the first 6 hours of a run by setting FREQ_WRF_GRIB = 180:360, 60:360 in the post_grib.conf, the resulting grib files are using the initialization file reference time and the first forecast records are for 6 hours forecast. Is it an acceptable practice to reset the referenc...
by norulz
Mon Dec 28, 2020 5:49 pm
Forum: UEMS v18 and higher support
Topic: Underestimated cloud cover
Replies: 5
Views: 372

Re: Underestimated cloud cover

Thanks for the hints.
I'll start tweaking the microphyisics schemes
by norulz
Tue Dec 15, 2020 10:31 am
Forum: UEMS v18 and higher support
Topic: Underestimated cloud cover
Replies: 5
Views: 372

Re: Underestimated cloud cover

Hi,

I'm using UEMS 20.11.3 and 19.8.1
The difference is to real observations and the lack of resolving cloud cover appear to be related to non-convective clouds.
Convection is being forecast quite accurately.
by norulz
Tue Dec 08, 2020 10:11 am
Forum: UEMS v18 and higher support
Topic: Underestimated cloud cover
Replies: 5
Views: 372

Underestimated cloud cover

In the eastern Mediterranean area I am noticing underestimation of cloud cover by WRF. This in comparison to the cloud coverage predicted by global models (GFS, ICON, Arpege). I have tried several CU and PBL schemes resulting in only minor differences in cloud prediction. Has anyone tried to adjust ...
by norulz
Tue Dec 08, 2020 9:37 am
Forum: UEMS v18 and higher support
Topic: Underestimated cloud cover
Replies: 0
Views: 153

Underestimated cloud cover

In the eastern Mediterranean area I am noticing underestimation of cloud cover by WRF. This in comparison to the cloud coverage predicted by global models (GFS, ICON, Arpege). I have tried several CU and PBL schemes resulting in only minor differences in cloud prediction. Has anyone tried to adjust ...
by norulz
Fri Oct 30, 2020 11:51 am
Forum: UEMS v18 and higher support
Topic: ems_autorun runs WRF ARW twice
Replies: 1
Views: 461

Re: ems_autorun runs WRF ARW twice

Hi,
What is sysinfo reporting in regards to number of cpu's and cores?
Have you turned off hyperthreading?
David
by norulz
Fri Oct 30, 2020 11:44 am
Forum: UEMS v18 and higher support
Topic: Problems installing on Debian (64-Bit)
Replies: 2
Views: 385

Re: Problems installing on Debian (64-Bit)

Hi,
I ran into the same problem installing on Debian 10
The problem is in the installer script with a call to "uname" on line 2281

My workaround:
changed line 2281 to $info{hwtype} = `/bin/uname -m`;
instead of uname -i

I updated Robert on this
by norulz
Sat Oct 05, 2019 11:22 am
Forum: UEMS v18 and higher support
Topic: About FV3 data
Replies: 4
Views: 3696

Re: About FV3 data

As far as I remember, gfsp25 and gfsp25pt and other gfs datasets switched over to FV3 on the 12 June this year.
If you have the latest version of UEMS the switch over is transparent.
David
by norulz
Sat Jul 06, 2019 9:22 am
Forum: UEMS v18 and higher support
Topic: Google Cloud Platform and Hyperthreading
Replies: 4
Views: 3745

Re: Google Cloud Platform and Hyperthreading

It is possible to set the number of cpus and to stop the hyperthreading of an E2C instance, at least on Ubuntu distros This is what I used: edit /etc/default/grub if you want 16 cores for c3.8xlarge for e.g you'd edit: GRUB_CMDLINE_LINUX_DEFAULT="console=tty1 console=ttyS0 maxcpus=16" GRUB...
by norulz
Sat Jul 06, 2019 9:11 am
Forum: UEMS v18 and higher support
Topic: Copying domains
Replies: 2
Views: 2633

Re: Copying domains

Hi,

Simply create a new domain using the command line ems_domain --create ...
Then copy the namelist.wps file from the static folder in your old domain to the static folder in the new domain (overwrite the existing namelist.wps).
Then finally run

Code: Select all

ems_domain --localize
on the new domain.