From heat back to snow, fire danger and storm warnings — spring weather has given the country some serious whiplash.

In the space of 24 hours last weekend, Melbourne went from a sunny 26 degrees to its coldest November day in 80 years.

Similar temperature drops have been experienced in New South Wales.

Brisbane, too, has felt the wrath of spring's dramatic twists and turns, with hot, fire-prone days swinging to rain and giant hail, as have many other parts of Australia.

So what's going on?

Warm and cool collide

It's all about the clash between warm air and cool air, according to Bureau of Meteorology (BOM) senior meteorologist Angus Hines.

"That's definitely a hallmark of springtime weather — that rapidly changeable, volatile weather, where one day is completely different from the n

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