WeatherTheatre SceneOne captures Tropical Cyclone Christine, not long before it crossed the Northwest Australian coast. TC Christine stands out as a slender vorticity tube, coloured by wind speed, near the Northwest Australian coast on the 30-12-2013-18z SceneOne analysis. The strongest winds are lower down the in atmosphere, as is typical for warm cored tropical cyclones (via the thermal wind relation).
A strong, upper cold front is situated south of Australia, in the background of the WeatherTheatre SceneOne, 3-12-2013-0z Analysis, Southerly View. The front is marked by a deep tropopause fold and associated elevated theta surface behind, indicating a good depth and spread of cold air following.
A tongue of warm air stretches across Southeast Australia preceding the front, reflected in the valley in the 300K Theta surface, where the intersection with the surface corresponds to the 27 degree celcius isotherm. Forecast models project widespread rain across Southeast Australia ahead of the front and the cold-air behind the front should bring unseasonal snowfalls to the Southeast Australia mountains on Thursday, 5th.
A tropopause lowering over the Tasman Sea, seen on the left side of SceneOne and coming into view in the last few frames of the Southerly to Westerly Orbital View, is associated with a cut-off low which is expected to gradually weaken in the next two days.