A major storm system is poised to affect vast regions of the eastern and southern parts of the United States over the Memorial Day weekend, bringing substantial rainfall, thunderstorms, and potential localized flooding. Cities such as New York, Philadelphia, Atlanta, and Washington, D.C. are likely to experience temperatures cooler than the seasonal average, with some locations dipping nearly 20 degrees below normal. Meteorologists caution that successive rain events could lead to 1 to 3 inches of precipitation across areas of Texas, Louisiana, and the Tennessee Valley. In contrast, the western United States is predicted to stay warm and predominantly dry throughout the holiday weekend, underscoring a stark national weather contrast.
