The WRF model is unable to capture the regional precipitation

[linhai]

I am encountering an issue with my WRF simulation where it fails to produce any precipitation. I have configured and run the model for a specific domain of interest. Upon checking the output files, I found that the values for both RAINC and RAINNC are consistently zero throughout the simulation period.

However, a comparison with ERA5 reanalysis data for the identical time and location indicates significant precipitation. This discrepancy suggests a problem in my setup or configuration.I would be grateful for any insights into the possible causes of this problem.

 

[Ming Chen]

Based on your namelist, I suppose you run this case using ERA5 as input. Please let me know if I am wrong.

Since you turn off cumulus scheme, it is expected that RAINC==0. However, RAINC should not be zero.

Which version of WRF did you run? Is it WRF-ARW?

 

[linhai]

Based on your namelist, I suppose you run this case using ERA5 as input. Please let me know if I am wrong.

Since you turn off cumulus scheme, it is expected that RAINC==0. However, RAINC should not be zero.

Which version of WRF did you run? Is it WRF-ARW?

Thank you for your reply.

I am using WRF-ARW version 4.5, driven by ERA5 data. The results indeed show that both RAINC and RAINNC are zero. I have tried running the simulation with a cumulus scheme enabled, but the result was still the same: both RAINC and RAINNC remain zero.

For your reference, here is the list of input variables I selected from the ERA5 data:

Pressure-Level Data Selection for Initial Fields:

• U-component of wind
• V-component of wind
• Temperature
• Specific humidity
• Geopotential

Single-Level Data Selection for Initial Fields:

• 10m u-component of wind
• 10m v-component of wind
• 2m dewpoint temperature
• 2m temperature
• Mean sea level pressure
• Sea surface temperature
• Skin temperature
• Surface pressure
• Soil temperature level 1-4
• Volumetric soil water layer 1-4
• Snow density
• Snow depth
• Land-sea mask
• Sea-ice cover

 

[Ming Chen]

Can you upload a single met_em file for me to take a look? Thanks.