Techniques, performed by a distributed unit (DU) for a radio access network (RAN) node in a 5G communication network defining one or more cells, are disclosed for dynamically scheduling SIB8 warning messages. In some embodiments, in response to a write-replace warning request for broadcasting a SIB8 warning message, the DU determines a weightage of the SIB8 warning message; determines, based on the weightage, a system information periodicity for the SIB8 warning message and a change of one or both a default paging cycle and a modification period coefficient parameter to establish an initial delay before broadcasting the SIB8 warning message; and schedules a broadcast of the SIB8 warning message with broadcast timing based on the system information periodicity and pre-provisioned default paging cycle and modification period coefficient parameters.