First the links:
http://www.weather.com/weather/map/interactive?animation=true
You can slide the timeline to see it evolve.
http://smn.cna.gob.mx/index.php?option=com_content&view=article&id=14&Itemid=84
Click on C. Catedral
End of the world? Invisible UFO?
Cool pattern nevertheless.
EDIT:
Sunhi's gif
http://www.weather.com/weather/map/interactive?animation=true
You can slide the timeline to see it evolve.
http://smn.cna.gob.mx/index.php?option=com_content&view=article&id=14&Itemid=84
Click on C. Catedral
End of the world? Invisible UFO?
Radar glitching out?
Cool pattern nevertheless.
EDIT:
Sunhi's gif