DIXIE ALLEY — Tornado season is ramping back up across the South and Lower Mississippi Valley as November arrives. While most people connect tornadoes with spring, Dixie Alley’s primary tornado season runs from November through March. November often brings multi-state outbreaks and multiple tornadoes in a single day, making it a time of year that can catch residents off guard.
Greatest November Risk Centered on Louisiana, Mississippi, and Southern Arkansas
The highest average tornado risk in November sits across Louisiana, Mississippi, southern Arkansas, and parts of east Texas. Cities including Jackson and New Orleans fall inside or near this core zone, where November tornado activity has historically been most frequent.
A surrounding area of greater risk extends from Dallas and Houston through Little Rock and Memphis and into western Alabama near Birmingham. This corridor forms the heart of Dixie Alley during the late fall and early winter months.
Possible Risk Stretches From Kansas City and St. Louis to Washington and Miami
Beyond the core of Dixie Alley, a broad area of possible tornado activity covers much of the central and eastern United States. It reaches north to Kansas City, St. Louis, Evansville, and Indianapolis, and west to Oklahoma City and Wichita.
To the east, the possible risk area spreads across Atlanta, Chattanooga, Charlotte, Raleigh, Charleston, and Savannah, extending up the coast toward Washington, D.C., and Philadelphia. Florida is also included, with the risk area running south through Pensacola, Orlando, and Miami.
Strengthening Jet Stream and Gulf Moisture Fuel Fall Supercells
November tornado activity is driven by a jet stream that strengthens and dips farther south as the season changes. When warm, humid air from the Gulf collides with colder air moving in from the north, conditions can quickly become favorable for severe storms.
These setups can produce rotating supercells capable of strong, long-track tornadoes. Fast-moving storm systems in the cooler months often cover large distances in a short time, which is why outbreaks can affect several states in one day.
Tornado Season Can Catch Residents Off Guard in the Cooler Months
Because tornadoes are often thought of as a spring threat, November and winter storms can catch people off guard if they are not paying attention. Many fall and winter tornadoes also strike after dark, when warnings are harder to receive and storms are harder to see.
Residents across Dixie Alley should review their severe weather plans now, including where to take shelter at home, work, and school. Keeping a weather radio and phone alerts turned on, especially overnight, can make a critical difference as the season gets underway.
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