In the Eastern U.S., the Bermuda High, a semi-permanent high-pressure cell in the Atlantic, pumps warm, humid air northward from the Gulf of Mexico and the Caribbean. This results in hazy, hot, and humid conditions from the Midwest to the East Coast, where heat indices often exceed 100°F (38°C). Thunderstorms are frequent but often localized "pop-up" convective events.
Spring (March through May) is the most volatile season in the contiguous U.S. It represents the transition from winter dormancy to summer heat, characterized by the clash of retreating polar air and advancing tropical air masses. weather seasons in america
Summer marks the beginning of the Atlantic Hurricane Season. Coastal states along the Gulf of Mexico and the Atlantic seaboard are vulnerable to tropical storms and hurricanes. These massive systems bring destructive winds and torrential rains, posing significant threats to life, property, and the energy infrastructure of the Gulf Coast. In the Eastern U
Spring brings the "spring thaw," where snowmelt in the north flows into river systems. This, combined with spring rains, frequently leads to river flooding in the Midwest and Mississippi River Valley. Conversely, in the arid Southwest, spring is often the driest time of year, preceding the summer monsoon, creating high wildfire danger due to desiccated vegetation. Spring (March through May) is the most volatile
Astronomically the warmest season, summer (June through August) in the U.S. is defined by the expansion of the subtropical high-pressure systems. The experience of summer varies radically based on humidity and topography.