Surface Analysis of the Rear-Flank Downdraft in Two Tornadic Supercells

Research output: Contribution to journalArticle

Abstract

Data with high temporal and spatial resolution from Hurricanes Isabel (2003) and Frances (2004) were analyzed to provide a detailed study of near-surface linear structures with subkilometer wavelengths of the hurricane boundary layer (HBL). The analysis showed that the features were omnipresent throughout the data collection, displayed a horizontal and vertical coherency, and maintained an average orientation of 7° left of the low-level wind. A unique objective wavelength analysis was conducted, where wavelength was defined as the distance between two wind maxima or minima perpendicular to the features’ long axis, and revealed that although wavelengths as large as 1400 m were observed, the majority of the features had wavelengths between 200 and 650 m. The assessed wavelengths differ from those documented in a recent observational study. To evaluate the correlation between the features and the underlying near-surface wind field, time and spectral analyses were completed and ground-rel
Original languageEnglish
Pages (from-to)2344-2363
JournalMonthly Weather Review
StatePublished - 2008

Fingerprint Dive into the research topics of 'Surface Analysis of the Rear-Flank Downdraft in Two Tornadic Supercells'. Together they form a unique fingerprint.

  • Cite this