Official National Weather Service Storm Prediction Center outlooks for September 13, 2026, showed no tornado risk areas across the contiguous U.S., with only a marginal severe thunderstorm risk confined to parts of the Ohio Valley and Northeast. Limited buoyancy from poor mid-level lapse rates around 6–6.5 °C/km, combined with cloud cover, suppressed robust updrafts despite 35–45 kt of deep-layer shear ahead of a cold front. This environment favored isolated strong storms capable of marginal hail or wind but not organized supercells or significant tornadoes. Traders monitoring SPC updates and real-time mesoscale discussions would have seen the absence of any conditional tornado probabilities or watches as the dominant signal shaping market odds for that date.