Expert reveals supercell cause
A METEREOLOGIST has explained the reason behind the supercell that tore through Southeast Queensland on Thursday afternoon.
Weatherwatch expert Anthony Cornelius said multiple supercells tracked across the Darling Downs and Wide Bay Burnett district producing destructive winds, tennis-ballsized hail and even tornadoes.
“Yesterday was a very significant ‘ridge cradled trough’ setup, these are the most volatile storm set-ups in Queensland, hands down,” he said.
“Whenever these set-ups occur they nearly always produce destructive supercells. There are two big factors these set-ups generate.
“Increased instability from the introduction of low-level moisture mixing in with the hotter air ahead of the change (most storms develop behind the southeast change in these set-ups, which is different to most other storm set-ups).
“Increased shear from the strong east to northeast winds (the trough that is cradled by the ridge tilts the winds east to northeast, even though the air mass is coming from the southeast this enhances low-level shear).
“The increased instability allows for large thunderstorms to develop. The increased wind shear allows for thunderstorms to become organised and develop into supercells which are more likely to be destructive.”
HAVOC: A map explaining what caused the supercell to form that tore through the Gympie region yesterday.