What's the story, Morning Glory?

Morning Glory got a mention on QI tonight. No, not that sort of morning glory! This particular case of morning glory...

I wrote about the Morning Glory in Match Wits with the Kids three years ago.

Did you know...?
Some clouds form due to interactions with particular geographical features. One of the strangest of these is the geographically-specific cloud Morning Glory (I kid you not!). It is a rolling, cylindrical cloud which appears unpredictably over the Gulf of Carpentaria in Northern Australia. Due to a powerful ‘ripple’ in the atmosphere, it is possible to ‘surf’ the cloud in an unpowered glider.

Oh, and it's as long as the UK!