Strong El Niño conditions, with Niño 3.4 anomalies near +2.6°C and over 90% odds of a very strong event through winter, represent the dominant driver shaping trader views on the timing of the first measurable snow (≥0.1 inch at official NWS stations) for the 2026 season. High-elevation sites in Utah already recorded early September accumulations, consistent with climatological norms for peaks above 8,000 feet, while lower-elevation markets focus on October–November windows. NOAA Climate Prediction Center guidance and WPC medium-range forecasts highlight above-normal fall temperatures across the Northwest and northern Rockies that could delay onset there, contrasted with cooler, wetter signals favoring earlier flakes in parts of the Northeast and Great Lakes. Traders monitor updated GFS/ECMWF runs and NWS Daily Climate Reports for threshold crossings, as model divergence on steering patterns and cold-air outbreaks remains the key uncertainty through early October.