Hurricane Simon reached Category 4 intensity earlier in October with peak sustained winds near 150 mph, confirmed by National Hurricane Center aircraft reconnaissance, satellite estimates, and a central pressure as low as 937 mb. This established the dominant market-implied odds near 97.5% for Category 4 as the storm's maximum strength on the Saffir-Simpson scale. Subsequent rapid weakening to Category 1 (around 65-75 kt) stems from increasing northerly shear, dry-air entrainment, the cyclone's small size, and interaction with coastal terrain off western Mexico, with official forecasts holding it near minimal hurricane strength before further decline. A realistic shift to Category 5 would require renewed rapid intensification under unusually favorable conditions before dissipation, while lower categories remain improbable given verified historical peak data.