(Solved) negative Hourly precipitation and decrease in RAINNC

[JSY]

Hi, all

I'm running an ideal case and have successfully executed ideal.exe and wrf.exe.
However, I noticed a decrease in RAINNC, which means there is negative hourly precipitation.
Is this natural? How should I interpret negative precipitation values?

The values are quite large, so I can't easily ignore them.



The picture below is the next time step from the picture above.

I used the original versions of namelist.input and input_sounding.

 

[kwerner]

Hi,
Apologies for the delay. The reason you're seeing this behavior is due to the bucket_mm setting you have in your namelist. When this option is used, the array RAINNC will be 'emptied' and start to be 'refilled,' so to speak.

 

[JSY]

Thank you, the problem has been solved!

Now I know that I have to compute the precipitation by using the code like Rain = I_RAIN(N)C*bucket_mm + RAIN(N)C
because bucket_mm separates RAIN(N)C into RAIN(N)C and I_RAIN(N)C

Thanks