Abrupt shifts in air masses bring cooler, drier air into the Florida peninsula, often following periods of warm, humid weather. These transitions are marked by a drop in temperature, decreased humidity, and a shift in wind direction, frequently from northerly or northwesterly. Rainfall can accompany the leading edge of these changing weather patterns, but afterward, skies typically clear, leaving behind sunshine and crisp air. For instance, a shift from 85F and 90% humidity to 70F and 50% humidity within a 24-hour period illustrates this phenomenon.
These meteorological events are vital for regulating Florida’s subtropical climate. They moderate temperature extremes, reducing stress on agriculture and ecosystems. They also play a critical role in controlling insect populations and mitigating wildfire risk by lowering humidity levels. Historically, the timing and intensity of these seasonal transitions have influenced agricultural practices and settlement patterns across the state. Their arrival is often welcomed after prolonged stretches of summer heat and humidity.
