Observational analysis of Atlantic Basin tropical cyclone squall lines and relationship to the diurnal cycle
Date of Award
Master of Science (MS)
Atmospheric and Earth Science
John R. Mecikalski
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.
Brasfield, Vivian, "Observational analysis of Atlantic Basin tropical cyclone squall lines and relationship to the diurnal cycle" (2022). Theses. 374.