Abstract This study uses convection‐permitting simulations to examine the vertical extent, propagation, and nighttime preference of diurnal pulses (DPs) in tropical cyclones (TCs). DPs are outward‐moving rings of cooler brightness temperatures near the storm center and may indicate TC intensification. Their initiation and propagation are poorly understood due to limited high‐resolution observations. Here we leverage ensemble case study simulations of Typhoon Haiyan (2013) and Hurricane Maria (2017) to analyze DP events and quantify their structure and propagation characteristics. Results show that DPs are deep, column‐spanning features visible in multiple atmospheric variables, including precipitation, temperature, vertical velocity, and radial wind. Interpreted through gravity‐wave theory, their speeds and vertical structure largely match theoretical expectations, with deviations that are consistent with convectively coupled gravity waves. DPs are more frequent at night, likely due to constructive interference with the TC’s diurnal circulation. These insights into DPs help clarify their initiation and propagation mechanisms.