[ncl-talk] wrfout file reading

[Anil Kumar - NOAA Affiliate]

Yes, wrf outputs are hourly files. Each hourly file has 10 multiple times
(6 mins interval).

Thanks,
Anil


On Fri, Dec 4, 2020 at 12:42 PM Ehsan Taghizadeh <ehsantaghizadeh at yahoo.com>
wrote:

> Dear Dr. Anil
> Are your wrfout files hourly?
> However, why you don't use wrf_user_list_times to extract the list of
> available times?
>
> fs1 = systemfunc("ls ../WRFV3/run/wrfout_d01*")
> nfs1= dimsizes(fs1)
> do i = 0, nfs1-1
>     f1 = addfile(fs1(i)+".nc","r")
>   times  = *wrf_user_list_times*(f1)  ; get times in the file
>
>   ntimes = dimsizes <https://www.ncl.ucar.edu/Document/Functions/Built-in/dimsizes.shtml>(times)         ; number of times in the file(s)
> end do
>
> *Sincerely*
> *Ehsan*
>
> On Friday, December 4, 2020, 05:57:54 PM GMT+3:30, Anil Kumar - NOAA
> Affiliate via ncl-talk <ncl-talk at mailman.ucar.edu> wrote:
>
>
> Hi,
> I am trying to read multiple wrfout files. I am reading okay..no problem
> with the code extracting variables.
> Problem comes, when each file has multiple times in it and then I don't
> know how to extract the time series of variables .
> Below is the code, please let me know how to modify code to read many
> times within each file.
> ************************
> fs1 = systemfunc("ls ../WRFV3/run/wrfout_d01*")
>  nfs1= dimsizes(fs1)
>  f1 = addfiles(fs1+".nc","r")
>   ntimes1 =  dimsizes(f1)         ; number of times in the file(s)
>
> loc1 = wrf_user_ij_to_ll(f1, 593., 546., True)
>  print("lon/lat locations are: " + loc)
> uu1      = new((/ntimes1/),float)
> vv1      = new((/ntimes1/),float)
> psfc1      = new((/ntimes1/),float)
> i1=0
> do while (i1.le.ntimes1-1)
> uu1(i1)    = f1[i1]->U(:,0,546,593)   ; (time, lat,lon)    ; (2,64,128)
> vv1(i1)    = f1[i1]->V(:,0,546,593)        ; V10(:,29.301,-94.797)
> psfc1(i1)  = f1[i1]->PSFC(:,546,593)
> i1 = i1 + 1
> end do
>    model_wspd1 = sqrt(uu1^2+vv1^2) ;wind_speed(uu,vv)
>    model_wdir1 = wind_direction(uu1,vv1,0)
>    model_psfc1 = psfc1/100.
> ************************
> --
> Dr. Anil Kumar
> Environmental Modeling Center/NCEP/NWS/NOAA
> College Park, MD, USA
>
>
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-- 
Dr. Anil Kumar
Environmental Modeling Center/NCEP/NWS/NOAA
College Park, MD, USA
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