After the Start of Spring, intensified warm, moist air collides fiercely with lingering cold air masses, triggering vigorous vertical convection. As humid warm air rises to sufficient heights, towering cumulonimbus clouds form. Within these clouds, intense electric fields cause collisions between positive and negative charges, discharging as thunderous claps of lightning.Thus, the occurrence of thunderstorms at this time is not only related to the warming of near-surface temperatures and the activity of cold air masses, but more significantly to the marked increase in atmospheric moisture.
Thus, it is observed: In winter, dry and cold air brings no thunder; in spring, rising moisture heralds the first thunder; in summer, high temperatures and humidity bring abundant thunder; in autumn, diminishing moisture causes thunder to subside. With spring's arrival, the strengthening of warm, moist air brings ample moisture, allowing towering thunderclouds to develop and spring thunder to reverberate across the sky.