Nolo reached a verified peak intensity of 155 mph sustained winds on September 28, 2026, placing it firmly in Category 4 on the Saffir-Simpson scale, which underpins the overwhelming 98% market-implied probability. Rapid intensification occurred amid warm sea surface temperatures and initially favorable low wind shear, allowing the storm to strengthen from a tropical storm to major hurricane status within days while passing south of Hawaii. Subsequent moderate to high northeasterly shear disrupted the eye and convection, halting further gains and preventing Category 5 thresholds above 157 mph. Official National Hurricane Center and Joint Typhoon Warning Center analyses confirm no higher intensity, though minor revisions in post-storm reanalysis or overlooked model runs could theoretically adjust the final classification.