The US was hit by a 'bomb cyclone' last week, bringing icy cold and driving snow. These storms develop very rapidly, forming outside the tropics, typically on continental east coasts in winter.
Most people in Australia's southeast are familiar with the stormy weather known as East Coast Lows. But they might not realise how much scientific progress has been made in understanding them.
Was Malcolm Turnbull right to say that larger and more frequent storms are one of the predicted consequences of climate change – but that you can't attribute any particular storm to global warming?