Mount Washington’s summit anemometer, maintained by the Mount Washington Observatory at 6,288 feet, records peak gusts that define this market. October climatology features strengthening westerlies and frequent extratropical cyclones that can produce 100–150 mph gusts when tight pressure gradients align with the mountain’s exposure; the all-time October maximum remains well below the 231 mph April 1934 record. As of late September 2026, observed summit winds have been light (under 30 mph sustained), with early October forecasts from NWS and regional models showing only modest intensification. Daily MWO observations and updated NHC/NOAA guidance on any developing nor’easters will provide the first measurable shifts in trader-implied probabilities.