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Chapter 5:Hazard Analysis—Tropical Cyclones <br /> • Phase I: The first step is to compare the differences between the existing and new <br /> FIRM maps to determine where historic or the recently modeled tsunami hazard is <br /> greater. <br /> • Phase II: UHM SOEST mapping (by Kwok Fai Cheung) can produce 100-year and <br /> 500-year probabilisitic tsunami hazard maps to provide future local modifications to <br /> the DFIRMs. <br /> 5.1.2 High Winds <br /> The hazard from hurricane winds is far more extensive than the water hazard. Both ex- <br /> periencc and analyses indicate that certain locations will experience stronger winds. <br /> Hurricane winds, blowing from variable directions, will experience analogous variations. <br /> This orographic (or topographic) amplification is the reason a minimal hurricane such as Iwa <br /> can have significant wind effects. The NWS hurricane reports assume landfall at a flat <br /> Atlantic or Gulf coast state, and no amplification. Since wind forces increase proportionally <br /> to the wind speed squared, any amplification of the basic wind speed may significantly <br /> increase its effects. <br /> 5-5 Hawaii County Multi-Hazard Mitigation Plan <br />