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CREATED:20261006T003857Z
DESCRIPTION:A Radar-Based Climatology of Thunderstorms in Hawaii\n\n\n\nMr. Robert A. Ballard\n\nAtmospheric Sciences M.S. Candidate\n\nDepartment of Atmospheric Sciences, S.O.E.S.T.\n\nUniversity of Hawaii at Manoa\n\n\n                            \nDate:                Wednesday, June 6, 2018\n\nTime:                2:00pm\n\nLocation:          IPRC Conference Room, POST 414\n\n\n\nAbstract:\n\n\n\n        While relatively infrequent, hazards related to severe convection in Hawai‘i do occasionally occur. Our understanding of these events can be improved by using algorithm data from the Weather Surveillance Radar-1988 Doppler (WSR-88D) to help build a spatial, temporal, and intensity climatology which eliminates population density and diurnal sampling biases. Radar can also expand the climatological area by approximately 17 times over that offered by land-based reports only. Surface and upper air observations and storm reports are used to validate the radar algorithm output. Parameters and indices from sounding data at Līhu‘e are compared to observed thunderstorms, as well as to output from the Maximum Estimated Hail Size (MEHS) and Tornado Vortex Signature (TVS) algorithms, to establish values significant for the occurrence of these events. The data show that greater instability is typically needed to support thunderstorms in Hawai‘i, approximately double that found for similar events over the continental United States. MEHS values greater than 32 mm appear to indicate a higher risk of severe hail in Hawai‘i, and these occur within radar range on average every 5.5 days per year. MEHS values likely to be associated with supercells and very large hail occur within radar range about 1.5 day per year. Most TVSs in Hawai‘i are associated with delta-V values of 
DTEND;TZID=Pacific/Honolulu:20180607T010000Z
DTSTAMP:20261006T003857Z
DTSTART;TZID=Pacific/Honolulu:20180607T000000Z
LAST-MODIFIED:20261006T003857Z
LOCATION:IPRC Conference Room, POST 414
PRIORITY:5
SEQUENCE:0
SUMMARY;LANGUAGE=en-us:Atmospheric Sciences Master's Defense
TRANSP:OPAQUE
UID:179128313733430web-support-l@lists.hawaii.edu
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