How to extract the selected varaibles in particular lcoation and save csv format

[paparao123]

Dear all, I am delighted to utilize the PostWRF, and I am seeking assistance in extracting specific variables from the WRF output file (WRFOUT). The variables of interest are psfc (surface pressure), temp (temperature), wspd (wind speed), and wdir (wind direction) at a particular location. Ideally, I would like to save this information in a CSV file named wrfhrly(name).csv .The format of the file should be as follows. Please help me in this regard . thank you

Date psfc temp wspd wdir
2019-01-01_00:00:00 98644.47 25.37 1.72 168.86 2019-01-01_01:00:00 96644.47 26.54 2.0 195.54

[anikfal]

Hi @paparao123

Have you taken a look at the documentation or the YouTube training videos? https://postwrf.readthedocs.io/en/latest/extraction.html#time-series-of-the-wrf-variables

PostWRF is currently not capable of saving the extracted values as CSV. This capability will be added in near future. However, you can simply use a spread-sheet software (Excel, LibreOffice, ...) to convert the extracted values to CSV.

[paparao123]

Hi Anikfal thank you for reply , currently i am extracted for all locations but it is individual files I am looking extracting specific variables are like 4 to 5 variables at a particular location. Date psfc temp wspd wdir all in extracted in single file 2019-01-01_00:00:00 98644.47 25.37 1.72 168.86 2019-01-01_01:00:00 96644.47 26.54 2.0 195.54

[anikfal]

Extracting multiple variables in a single file is not a good idea. Since every extracted variable has multiple columns and rows, and need to be stored in a separate file.

[MrHoneyB]

Dear all, when we are extracting PM10 and PM2.5 values using postwrf at what height it is giving us the value?

[anikfal]

Hi @NishantBehera Extracting in PostWRF is only for the surface layer. So it will be possible to compare it with station data. For the values on atmospheric pressures, you can use cross-section plots or vertical profile plot.

[MrHoneyB]

Hi, can we extract the PBL height from the output file with the help of PostWRF?

[anikfal]

@NishantBehera PBL height is directly simulated by WRF and is available in the WRF otput file. Just put PBLH as the variable name in the extraction section of namelist.wrf and run postwrf.sh.

[MrHoneyB]

Is there any way how we can find out the value of bulk richardson number with the help of postwrf

[anikfal]

As far as I know, by modifying namelist.input with regard to the PBL scheme, some variables related to the turbulent kinetic energy (not necessarily the Richardson number) can be simulated and be available in the WRF output.

[MrHoneyB]

In the contour map plot section is there any way to obtain only the wind vector keeping all other off

[anikfal]

@MrHoneyB Yes. Just do as you said. Enable wind vector and disable other options.