We've been asked why tropical cyclone Oma is weakening, and what's driving its movement—meteorologist Dr. Adam Morgan answers those questions for you in this quick update (issued 11 am AEST 22 Feb.). And for those of you looking to further improve your meteorology lingo 🤓: - An 'upper trough' is a weather driver in the upper atmosphere (troposphere) that can often lead to rapidly changing surface conditions (e.g. tropical cyclone decay or development). - The area of strongest winds in the mid t