Hypercane

[5][10] For comparison, the largest and most intense storm on record was 1979's Typhoon Tip, with a 1-minute sustained wind speed of 305 km/h (190 mph) and a minimum central pressure of 870 hPa (25.69 inHg).

[11][full citation needed] However, hypercanes may be as small as 25 km (15 mi) in size, and they would lose strength quickly after venturing into colder waters.

[5][failed verification] Water molecules in the stratosphere would react with ozone to accelerate decay into O2 and reduce absorption of ultraviolet light.

[citation needed] In Emanuel's model, if the temperature difference between the sea and the top of the troposphere is too large, there is no solution to the equilibrium equation.

The actual limit to hypercane intensity depends on other energy dissipation factors that are uncertain: whether inflow ceases to be isothermal, whether shock waves would form in the outflow around the eye, or whether turbulent breakdown of the vortex happens.

The relative sizes of Typhoon Tip , Cyclone Tracy , and the Contiguous United States . While hypercanes can be smaller than Cyclone Tracy, the largest hypercanes could even exceed Typhoon Tip in size.