After Hurricane Sandy in 2012 I decided to try to devise an index that would help me better analyze the potential damage caused by tropical cyclones.\u00a0 I developed the Hurricane Wind Intensity Size Index (HWISI).\u00a0 HWISI is based on a 100 point scale.\u00a0 It is designed so that a hurricane with a maximum sustained wind speed of 200 m.p.h. (320 km\/h) and is as big as Hurricane Sandy will get 100 points.<\/p>\n
There are two components to HWISI.\u00a0 There is a Hurricane Intensity Index (HII) and a Hurricane Size Index (HSI).\u00a0 HWISI is equal to the sum of HII and HSI.<\/p>\n
The Hurricane Intensity Index is a function of wind speed and it is scaled so that a hurricane with a maximum sustained wind speed of 200 m.p.h. (320 km\/h) gets 50 points.<\/p>\n
The Hurricane Size Index is based on the radius of the 64 kt, 50 kt, and 34 kt winds and it takes into account the variation of the wind field in four quadrants.\u00a0 If the hurricane has a wind field of the structure and size of Hurricane Sandy it would get 50 points.<\/p>\n
In order to help people understand the meaning of the magnitudes of the indices, I developed categories and descriptors for HII and HSI.\u00a0 The categories and descriptors for HII are based on the Saffir-Simpson Scale with some modifications.\u00a0 The descriptors for HSI were chosen after looking at the way the Storm Prediction Center describes the potential for severe weather and the Centers for Disease Control describes the spatial pattern of diseases.<\/p>\n
HII\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Descriptor<\/p>\n
00 – 08\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Minimal<\/p>\n
08 – 16\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Minor<\/p>\n
16 – 20\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Serious<\/p>\n
20 – 25\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Major<\/p>\n
25 – 35\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Severe<\/p>\n
35 – 50\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Catastrophic<\/p>\n
HSI\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Descriptor<\/p>\n
00 – 10\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Localized<\/p>\n
10 – 20\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Regional<\/p>\n
20 – 30\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Widespread<\/p>\n
30 – 50\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Extensive<\/p>\n
I calculate these indices for all tropical cyclones over the Atlantic Ocean, Caribbean Sea, Gulf of Mexico and Eastern North Pacific Ocean.\u00a0 I also calculate the indices for tropical cyclones over other ocean basins when it looks like they might have a significant impact on land.\u00a0 The indices are included in my blog on the home page when appropriate.\u00a0 HWISI is available for selected past hurricanes<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" After Hurricane Sandy in 2012 I decided to try to devise an index that would help me better analyze the potential damage caused by tropical cyclones.\u00a0 I developed the Hurricane Wind Intensity Size Index (HWISI).\u00a0 HWISI is based on a 100 point scale.\u00a0 It is designed so that a hurricane with a maximum sustained wind […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/pages\/2265"}],"collection":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2265"}],"version-history":[{"count":6,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/pages\/2265\/revisions"}],"predecessor-version":[{"id":13381,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/pages\/2265\/revisions\/13381"}],"wp:attachment":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}