Flash droughts in Spain develop quickly due to low rainfall and high evaporation rates. The study looked at the weather patterns that lead to these events from 1961 to 2018. They found that the North Atlantic Oscillation plays a big role in causing flash droughts, especially in winter and autumn. Before a flash drought starts, there are often high pressure systems over the region. Different types of weather patterns, like ridging and Saharan air intrusions, can also contribute to flash droughts in different seasons. Understanding these atmospheric dynamics can help predict and monitor flash droughts in Spain more effectively.