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Problem using Grads and ARWPost

diego.cemaden

New member
Hi

I am having a problem using the data created from ARWPost of WRF. When I open the CTL and try to plot the variables, I encounter the following issue:

ga-> open wrfout_d01_2024-05-13_00Z.ctl
Scanning description file: wrfout_d01_2024-05-13_00Z.ctl
Data file wrfout_d01_2024-05-13_00Z.dat is open as file 1
LON set to -79.8636 -30.224
LAT set to -40.6282 16.579
LEV set to 1 1
Time values set: 2024:5:13:0 2024:5:13:0
E set to 1 1
Notice: Implied interpolation for file wrfout_d01_2024-05-13_00Z.ctl
Interpolation will be performed on any data displayed from this file
ga-> d tc
Notice: Automatic Grid Interpolation Taking Place
Cannot contour grid - all undefined values
ga->
Below is the CTL file for verification.

dset ^wrfout_d01_2024-05-13_00Z.dat
undef 1.e30
title OUTPUT FROM WRF V4.1.2 MODEL
pdef 499 649 lcc -13.000 -55.000 1 1 0.00000 -13.00000 -55.00000 10000.000 10000.000
xdef 1103 linear -79.86363 0.04504504
ydef 1271 linear -40.62816 0.04504504
zdef 30 linear 1 1
tdef 97 linear 00Z13MAY2024 60MN
VARS 19
pressure 30 0 Model pressure (hPa)
geopt 30 0 Geopotential (m2/s2)
height 30 0 Model height (km)
tk 30 0 Temperature (K)
tc 30 0 Temperature (C)
theta 30 0 Potential Temperature (K)
td 30 0 Dewpoint Temperature (C)
td2 1 0 Dewpoint Temperature at 2m (C)
rh 30 0 Relative Humidity (%)
rh2 1 0 Relative Humidity at 2m (%)
wspd 30 0 Wind Speed (m s-1)
wdir 30 0 Wind Direction (Degrees)
ws10 1 0 Wind Speed at 10 M (m s-1)
wd10 1 0 Wind Direction at 10 M (Degrees)
umet 30 0 Rotated wind component (m s-1)
vmet 30 0 Rotated wind component (m s-1)
u10m 1 0 Rotated wind component (m s-1)
v10m 1 0 Rotated wind component (m s-1)
slp 1 0 Sea Levelp Pressure (hPa)
ENDVARS

Do you know what might be happening?
Thank you for your attention,
 
It seems that ARWpost didn't run successfully. If you check the datafile created by ARWpost, I guess the values of the variables are NaN.
I am not sure what is wrong in this case. Note that ARWpost is an obsolete package and we no longer support its application.
I would suggest that you switch to NCL or WRF Python, both of which are robust tools for WRF postprocess. Below are the websites for them:
 
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