Scattered Showers Likely in Eastern U.S. on Sep 23
• According to recent National Weather Service (NWS) and ensemble model guidance, scattered showers are expected across parts of the eastern and southeastern United States on September 23,
• Measurable precipitation, defined as 0.01 inches or more of liquid equivalent, is most likely in Florida and coastal mid-Atlantic areas due to a lingering upper-level low and onshore flow. Meanwhile, higher pressure and drier air will limit rainfall in the Northeast, Midwest, and western regions, consistent with late-September climatology. Rain probabilities vary significantly by location, with Miami, FL showing a 91% chance, Washington, DC at 87%, and Atlanta, GA at 55%. In contrast, cities like Seattle, WA and Boston, MA have rain probabilities below 10%. This forecast highlights localized convective activity and atmospheric moisture patterns typical for this time of year.
Impact & Risks
The scattered showers could impact outdoor activities and travel plans in areas with higher precipitation probabilities, such as Florida and the mid-Atlantic coast. While rainfall amounts are expected to be light, localized thunderstorms may develop in regions with lingering atmospheric moisture, such as the Appalachians and Tennessee Valley. Areas under high-pressure systems, including the Northeast and Midwest, are unlikely to experience significant rainfall, reducing risks in those regions. Residents in affected areas should remain aware of potential weather changes and monitor local forecasts for updates.
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