A downburst is a natural phenomenon that occurs during thunderstorms, creating hazards and damage to infrastructure due to the strong winds produced. This research contributes to the current literature by applying the Lundgren et al. scaling parameters (R0, T0, V0) to scale cooling source (CS) downburst simulations. The research also investigates the effects of the environmental lapse rate (ELR) on full-scale downburst outflows and compares the full-cloud model with the subcloud model simulations. The results showed that the scaling parameters preserve the temporal and vertical radial wind speed profile shape, as well as the wind speed locations. The primary and the secondary vortices are also preserved. Lower ELR resulted in downbursts with lower peak wind speed. A peak radial wind speed of 52.0 m/s is observed when ELR = 9.80 K/km, which decreases to 39.6 m/s when ELR = 7.76 K/km. Lower ELR also delayed the downdraft evolution, which is reflected in the outflow development. This research also found that the CS model can be employed to simulate the more realistic simulations of downbursts produced by full-cloud models. This aids in simulating realistic downbursts without relying on the expensive full-cloud models.