Surface observations of landfalling hurricane rainbands: case studies of Hurricane Bonnie (1998) and Hurricane Dennis (1999)

Show full item record

Title: Surface observations of landfalling hurricane rainbands: case studies of Hurricane Bonnie (1998) and Hurricane Dennis (1999)
Author: Skwira, Gary David
Abstract: This study examines the rainband -scale fluctuations of the meteorological parameters for Hurricane Bonnie (1998 ) and Dennis (1999 ) . Since reliable surface observations near the locations of landfalling hurricanes are quite rare due to power and /or instrumentation failure . Wind Engineering Mobile Instrumented Tower Experiment (WEMITE ) data are exploited to provide a unique look into the structure of the captured storms . The WEMITE data consists of high -resolution meteorological data—including wind speed and direction , temperature , relative humidity , and pressure— gathered from within the planetary boundary layer of landfalling hurricanes along the United States coastline . WEMITE data , along with supplemental data gathered by the National Weather Service , buoys , Coastal Marine Automated Network (CMAN ) stations , dropsondes and hurricane hunter observations , are assembled and analyzed through the use of Geographic Information Systems (GIS ) . Furthermore , nearby Next Generation Weather Surveillance Radar (NEXRAD WSR -88D ) data are used to identify and examine rainbands found within the hurricanes of interest . The observed meteorological profiles are compiled and the results are compared to previous rainband studies . The observed meteorological data suggest equivalent potential temperature minima , decreasing hurricane -relative inflow , and large -scale convergence to be commonly associated with intensifying or mature landfalling hurricane rainbands . Additionally , the results suggest larger rainbands (l00's of km long ) promote updrafts and reflectivity redevelopment to the inside of their axis . The shorter bands (100 km or less in length ) , conversely , tend to form from one or a number of cells that are elongated into a band by strong hurricane winds with regeneration upband .
URI: http : / /hdl .handle .net /2346 /18854
Date: 2003-05

Citation

Surface observations of landfalling hurricane rainbands: case studies of Hurricane Bonnie (1998) and Hurricane Dennis (1999). Doctoral dissertation, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /18854 .

Files in this item

Files Size Format View
31295018636679.pdf 39.05Mb application/pdf View/Open

This item appears in the following Collection(s)

Show full item record

Search DSpace

Advanced Search

Browse