AOS Department Seminar – Dan Fortier

ECMWF high resolution (~ 9 km) operational forecast analyses of potential vorticity (PV) are used to explore the evolution and diurnal cycle of Gulf Coast tropical cyclones (TCs) during 2020-2022. The standard deviation of PV, σ_PV, within horizontal domains centered on each TC is calculated for the 100 hPa pressure level at each time following the storm track. A case study of TC Marco and a composite of all 15 Gulf Coast TCs which occurred during the 2020, 2021, & 2022 seasons are described.