Traders assign the highest implied probability (77.5%) to 50–74 confirmed U.S. tornadoes in September 2026, near the long-term monthly average of roughly 66. This range reflects expectations of limited tornadic activity without major tropical cyclone landfalls, which normally drive southern outbreaks through enhanced shear and moisture. Confirmed counts reached only 45 by early October surveys, falling into the lower 25–49 bin amid sparse mid-latitude cyclone influence and below-average severe-weather reports outside isolated events in the Northeast and Midwest. NOAA and NWS data show September totals typically vary with steering patterns and residual tropical moisture; the absence of such systems this year produced the observed shortfall while still aligning with the market’s favored central band before final tallies settled.