The Registry and FORTRAN files contain all the updates needed to run WRFv4.1.1with lightning assimilation. Within the Registry and FORTRAN files, search for ‘!LTNG’ to find all of the modifications made for the lightning assimilation. To include lightning assimilation in WRFv4.1.1, simply replace the files from WRFv4.1.1 release with the files in the same name provided here under the directories Registry, phys, and dyn_em,respectively, and compile WRF as usual.