Turbulence in the atmosphere is often studied using 3D simulations as a virtual laboratory. Most experiments require code modification by users, but this is hard, because most codes are written in low-level languages as Fortran and C++. MicroHH.jl, a Julia port of the dynamical core of MicroHH, has been designed to solve this problem. It is built on MPI.jl, LoopVectorization.jl, CUDA.jl, and HDF5.jl for the IO. Interaction with running simulations is made possible via user scripts.