A strengthening El Niño, now with over 90% confidence per NOAA, is the dominant factor shaping early trader positioning for the first measurable snowfall (0.1 inch or more) in major northern cities. This pattern typically shifts the jet stream southward, favoring above-normal temperatures across the Midwest and Northeast through fall and into early winter, which can delay the arrival of sustained cold air needed for snow at low elevations. Recent seasonal outlooks from the Old Farmer’s Almanac and ECMWF/UKMO models show mixed signals, with some above-normal precipitation possible but overall milder conditions in the Great Lakes and Northeast compared to climatology. Historical medians place first snow in Chicago and Detroit around mid-November and New York City slightly later; traders are watching October model runs and early cold-front passages for signals of earlier or later timing. No measurable snow has occurred yet in these markets as of mid-September.