Throughout winter, polar air dominates. In spring, the subtropical jet stream strengthens and shifts northward, pulling warm, humid air from the Gulf of Mexico (in North America) or the Mediterranean (in Europe). This warm air undercuts lingering cold, dense air. The boundary between them—the stationary front—becomes a breeding ground for storms.
Spring does not look the same everywhere. Geography plays a massive role in how the season manifests. spring season weather
As the sun melts snow and ice, and as southerly winds bring humidity from oceans, the amount of water vapor in the air rises dramatically. This latent heat energy is the fuel for thunderstorms and heavy rain. Throughout winter, polar air dominates