Minimum sustained wind speed70 m/s
4.49Charging grizzly bears
140Slow shopping carts
46.7Elevator speeds
≥157 mph / 137 kt; threshold for Category 5 classification
Photo by NASA on Unsplash
Category 5 Hurricane
Nature's most powerful heat engine, wind included/Events & Phenomena
A Category 5 hurricane on the Saffir-Simpson scale has sustained winds exceeding 157 mph (70 m/s) and represents the most intense classification for tropical cyclones. These storms can span over 800 km in diameter and release energy equivalent to multiple nuclear weapons per second. Hurricane Patricia (2015) reached a record 215 mph sustained winds. The eye of the storm, paradoxically calm, typically has dramatically lower atmospheric pressure than the surrounding maelstrom.
Measurements
Typical storm diameter800,000 m
1.1 millionCello lengths
160,000Beaver dam lengths
333NASCAR ovals
~800 km across; some exceed 1,000 km
Energy released per day21 quintillion J
7 quadrillionToilet flushes
21 billionLightning bolts
210 octillionFirefly flashes
Equivalent to ~200 times the world's daily electricity output
Eye pressure (intense storm)92,000 Pa
9.1 tenthsStandard atmospheres
5.75Blood pressures
~920 hPa in the eye; normal sea level is 101,325 Pa
Record sustained wind96 m/s
192Shopping carts
35.6Casual joggers
20.2 billionHair growths
Hurricane Patricia, 2015; 215 mph / 345 km/h
Kinetic energy dissipation rate3 trillion W
2 billionPool pumps
3 quintillionQuartz watches
2,479Flux capacitors
~3 TW of kinetic energy in the wind field alone
Eye diameter40,000 m
21,858Dining table lengths
57.1 millionPencil lead widths
Typical eye is 30-65 km across; smaller eyes often mean stronger storms