Convection » Heavy Precip./Flash Floods Example 4: Tropical Islands During the Cool Season
During the cool season or transition months, tropical islands can be affected by heavy rainfall and flash floods due to upper-level troughs, cold fronts, and surface pre-frontal troughs.
In these areas, the skew-T parameters do not need to exceed the thresholds used for flash floods in the mid-latitudes because of the abundant moisture and increased probability of warm rain processes.

When forecasting in the tropics, examine the upper-level synoptic environment and lower-tropospheric wind direction relative to the terrain to determine where moisture convergence and lifting will be focused over a small region.
Air masses with tropical characteristics can cause flooding events even in mid-latitudes.