A strengthening historic El Niño, with Niño-3.4 anomalies already exceeding +1.8°C and forecasts for record strength by late 2026, typically shifts the Pacific storm track southward and favors below-normal October precipitation across the Pacific Northwest. However, NOAA’s Climate Prediction Center October outlook assigns equal chances for below-, near-, or above-normal totals in the region after dynamical models and the ENSO-OCN tool failed to reinforce the drier El Niño composite signal. This tension, plus potential early-month troughing or recurving tropical cyclones that could disrupt the longwave pattern, sustains roughly balanced market-implied probabilities across the precipitation bins centered on Seattle’s 3.9-inch climatological average. New model runs and the October 8 ENSO update will provide the next key data points.