Not much has been written about the role of triggers in the literature on causal reasoning, causal modeling, or philosophy.The paper focuses on describing triggers and causes in the metaphysical sense and differentiating them.A mathematical model and the Cause-Trigger algorithm are proposed to determine whether a process is a cause or a trigger of an effect.The algorithm is demonstrated on the climatological data of two recent cyclones, Freddy and Zazu, successfully detecting triggers for high wind speed.