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Typhoon Forrest in September 1983 in the Northwest Pacific Ocean deepened by 100 mb (976 to 876 mb) in just under 24 hr (Roger Edson, personal communication). Estimated surface sustained winds increased a maximum of 15 m/s (30 kt, 35 mph) in 6 hr and 44 m/s (85 kt, 98 mph) in one day (from 33 to 77 m/s [65 to 150 kt, 75 to 173 mph]).

In the Atlantic Hurricane Gilbert went from 960 mb to 888 mb in a 24 hour period for a 3 mb/hr pressure drop. The winds went from 57 to 82 m/s (110 kt to 160 kt, 127 mph to 184 mph) in that 24 hour period. And Hurricane Beulah in 1967 underwent a 6.33 mb/hr drop over a six hour period.