**Strong El Niño conditions, with NOAA assigning over 90% odds of a very strong event this winter, represent the dominant driver shaping early-season snowfall timing across the U.S.** This pattern typically shifts the jet stream and storm tracks southward, favoring wetter conditions in the southern Rockies and central U.S. while producing warmer, drier anomalies in the Northwest and northern Plains. Recent National Weather Service observations confirm light snow already falling at high elevations above 11,000 feet in the Colorado Rockies and parts of Alaska and Washington mountains during late September, consistent with climatological norms for those altitudes. In contrast, first measurable accumulation (≥0.1 inch) at lower-elevation stations remains unlikely before mid-to-late October in the northern tier states and early-to-mid November farther south, per current model consensus. Traders should monitor upcoming NWS forecast discussions, NOAA ENSO updates, and official daily snowfall reports from stations such as those in Denver, Buffalo, or Chicago for resolution signals.