Mysterious rectangular cloud

A mysterious rectangular cloud rapidly appeared and disappeared over Northern Australia on Sunday around 5pm. 

from the The Age weather website. While satellite pictures clearly show its dramatic formation and dissipation, there have been no local news reports in any of the local papers in the affected cities. I can’t understand why such an odd meteorological event has gone by without some in-depth reporting, except perhaps that it’s a cover-up by conspiratorial weatherpeople nationwide.

Northern Australians: Be alert (but not alarmed) to abrupt changes in your local weather. Melbnians, don’t worry, such changes are normal.