Date of Award


Document Type


Degree Name

Master of Science (MS)


Atmospheric and Earth Science

Committee Chair

John R. Mecikalski

Committee Member

Patrick Duran

Committee Member

Kevin Knupp


Hurricanes, Cyclones--Tropics, Squall lines, Meteorology--Diurnal variations


Previous studies on the tropical cyclone (TC) diurnal cycle have shown in observations and modeling the presence of outward propagating squall lines. These squall lines were observed in several TCs during recent Atlantic hurricane seasons. Three cases from previous years were chosen based on their impact to land and diurnal characteristics. This study seeks to characterize these squall lines and their environmental and thermodynamic characteristics, determine whether they behave more like midlatitude squall lines or tropical cyclone rain bands, and assess the performance of the convection-allowing High Resolution Rapid Refresh model in forecasting them over the ocean and over land. By using a combination of radar and surface data as well as HRRR model output, these cases will be evaluated based on criteria from past literature in order to better understand these features as a whole and in relation to the diurnal cycle.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.