19 - Page 1/6 GEOL 0820 Ramsey Natural Disasters Spring,...

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Unformatted text preview: Page 1/6 GEOL 0820 Ramsey Natural Disasters Spring, 2011 LECTURE #19: Hurricane Damage, Monitoring & Case Study Date: 4 April 2011 I. Hurricane Statistics: averages o number of named storms since 1995: 13 compared to 8.6 since 1970 o 7.7 hurricanes and 3.6 major hurricanes since 1995 compared to 5 hurricanes since 1970 1.5 major hurricanes since 1970 o recent Cat-5 hurricanes: Name Date Max Wind Speed Hugo 1989 160 mph Andrew 1992 175 mph Mitch 1998 180 mph Isabel 2003 165 mph Ivan 2004 165 mph Emily 2005 160 mph Katrina 2005 175 mph Rita 2005 180 mph Wilma 2005 185 mph o Costliest US Hurricanes: Name Season Cost (2005 USD) Katrina 2005 $88.5 billion Andrew 1992 $40.3 billion Wilma 2005 $20.6 billion Ike 2008 $18.0 billion Charley 2004 $14.0 billion in 2010 $USD wind types o hurricane wind velocity (HWV) speed of the CCW winds number quoted when assessing the category of the storm 79 to > 155 mph Page 2/6 o storm center velocity (SCV) speed of the storm movement over ocean/land commonly 5 to 60 mph influenced by the upper level winds, regional temps, other weather patterns example: Andrew in 1992 changed direction twice due to a high pressure system over the southeastern US and upper level winds over the Gulf of Mexico o both of these can combine to...
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19 - Page 1/6 GEOL 0820 Ramsey Natural Disasters Spring,...

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