Strange 'S'-shaped Radar Phenomenon Appears Off Western Australia's Coast
February 12, 2014
A strange S-shaped formation which appeared on weather bureau radar off the West Australian coast was not caused by cloud, the bureau says.
Photo: ABC News / A screenshot of a Bureau of Meteorology map
The shape was spotted on the weather bureau's radar map on Wednesday about 30 kilometres west of Rottnest, Island.
After checking the satellite, the bureau's Neil Bennett ruled out the phenomenon being caused by cloud.
"There's no cloud, there's nothing to produce a rain echo, ... which we do see a lot, but not this particular shape," he said. "They don't take on "S" shapes and things like that.
"The radar that we use are there for the detection of precipitation, it's basically just a beam going out and hitting the rain droplets or ice particles from hail. Sometimes the beam itself rather than going straight it gets bent back to earth and you start to pick up reflections from the ocean, rather than rain droplets."
The ABC has asked the Department of Defense whether there are military operations off the coast which may interfere with radar activity.
The department is yet to comment.
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