Current short-term forecast models from the National Weather Service and other agencies show a persistent high-pressure ridge over the Pacific Northwest driving northerly flow and mostly clear conditions for Seattle on October 6, with an expected overnight low in the upper 40s to low 50s°F. This setup aligns with the balanced market odds between sub-45°F and 64°F+ outcomes, reflecting minor model disagreements on exact cooling rates under light winds and dry air. A strengthening El Niño adds a broader warmer-than-normal signal for the season but has limited influence on this near-term diurnal minimum. Traders will watch the next NWS model runs and local observations for any shifts in steering patterns or cloud cover that could alter the low by a few degrees.