Conversion programs • arw2arl has problem with polar projection and true latitudes

Hello everyone!

I'm trying to convert WRF output files to ARL format using arw2arl, but the conversion fails with the following error:

ERROR: incorrectly defined polar projection in WRF!
TRUELAT1 does not equal TRUELAT2: -56.9850006 -90.0000000
TRUELAT1 defines the latitude at which the grid resolution is defined.
STOP 900

My WRF output uses a polar stereographic projection with two different true latitudes defined. From what I understand, arw2arl expects TRUELAT1 and TRUELAT2 to be the same, which isn’t the case in my setup.

Has anyone encountered this issue before? Is there a known workaround or modification that would allow the conversion to proceed successfully?
Any suggestions or guidance would be greatly appreciated.

Best regards,
Charlie

Statistics: Posted by Charlie — May 2nd, 2025, 5:55 pm

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