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cyclones No During landfall the increased friction over land acts somewhat contradictory to expectations to both decrease the sustained winds and also to increase the gusts felt at the surface (Powell and Houston 1996) The sustained 1 min or longer average winds are reduced because of the dampening effect of larger roughness over land i e bushes trees and houses over land versus

This depletion of moisture and heat hurts the tropical cyclone s ability to produce thunderstorms near the storm center Without this convection the storm rapidly fills An early numerical simulation (Tuleya and Kurihara 1978) had shown that a hurricane making landfall over a very moist region i e mainly swamp so that surface evaporation is unchanged intensification may result However a more recent

This depletion of moisture and heat hurts the tropical cyclone s ability to produce thunderstorms near the storm center Without this convection the storm rapidly fills An early numerical simulation (Tuleya 1994) that has a more realistic treatment of surface conditions found that even over a swampy area a hurricane would weaken because of limited heat sources Indeed nature conducted this

cyclones No During landfall the increased friction over land acts somewhat contradictory to expectations to both decrease the sustained winds and also to increase the gusts felt at the surface (Powell and Houston 1996) The sustained 1 min or longer average winds are reduced because of the dampening effect of larger roughness over land i e bushes trees and houses over land versus

sustained winds or by central pressure and size measured by radius of 15 m s gale force 30 kts 35 mph winds or the radius of the outer closed isobar (Weatherford and Gray 1988) Hurricane Andrew is a good example of a very intense tropical cyclone 922 mb central pressure and 64 m s 125 kt 145 mph sustained winds at landfall in

sustained winds or by central pressure and size measured by radius of 15 m s gale force 30 kts 35 mph winds or the radius of the outer closed isobar Weatherford and Gray (1988) also showed that changes of both intensity and size are essentially independent of one another 4 Has there ever been an attempt or experiment to reduce the strength of

sustained winds or by central pressure and size measured by radius of 15 m s gale force 30 kts 35 mph winds or the radius of the outer closed isobar Willoughby et al. (1985) 5 Why don t we try to destroy tropical cyclones by seeding them with silver iodide Actually for a couple decades NOAA and its predecessor tried to weaken hurricanes

sustained winds or by central pressure and size measured by radius of 15 m s gale force 30 kts 35 mph winds or the radius of the outer closed isobar Willoughby et al.(1985) Concentric eyewall cycles naturally occur in intense tropical cyclones wind gt 50 m s 100 kt 115 mph As tropical cyclones reach this threshold of intensity they usually but

sustained winds or by central pressure and size measured by radius of 15 m s gale force 30 kts 35 mph winds or the radius of the outer closed isobar Willoughby et al. (1985) 5 Why don t we try to destroy tropical cyclones by seeding them with silver iodide Actually for a couple decades NOAA and its predecessor tried to weaken hurricanes

sustained winds or by central pressure and size measured by radius of 15 m s gale force 30 kts 35 mph winds or the radius of the outer closed isobar Willoughby et al. (1982) and Willoughby 1990 6 Why don t we try to destroy tropical cyclones by placing a substance on the ocean surface There has been some experimental work in trying