### Where does WRF calculate velocity?

Posted:

**Thu Nov 02, 2017 7:37 am**Hi,

I am trying to find the part of the code where WRF updates the velocity u and v (or ru and rv). In particular I want to know exactly how rv is calculated from rv_tend. I assumed it was in rk_tendency but can't find where the 4D variables are actually updated at the end of the timestep.

Any help much appreciated!

I am trying to find the part of the code where WRF updates the velocity u and v (or ru and rv). In particular I want to know exactly how rv is calculated from rv_tend. I assumed it was in rk_tendency but can't find where the 4D variables are actually updated at the end of the timestep.

Any help much appreciated!