Current river stage at Baton Rouge stands near 10 ft with discharge around 290,000 cfs, above the October median, yet the Greater Mississippi Basin recorded its 26th-driest January–September period on record. Seasonal autumn declines driven by reduced upstream precipitation and elevated evapotranspiration typically lower stages through November, while year-to-date moisture deficits and localized drought intensification in the Lower Basin increase the likelihood of minima in the 4–6 ft range. Market-implied odds above 6 ft reflect trader assessment that recent September wetness and normal early-October flows will moderate further drops, though La Niña-like Pacific patterns historically amplify low-flow events. NOAA river forecasts and USGS monitoring will provide key updates through the resolution window.