Weird weather radar anomoly - Australia 16th November 2011

Weather report for the area where anomoly occured:
Australian Government Bureau of Meteorology
Western Australia

Perth Forecast
Issued at 4:50 am WST on Wednesday 16 November 2011

Warning summary
Nil.

Forecast for Wednesday
Mostly sunny. Light SW/SE winds tending moderate W/SW in the afternoon.

Precis: Mostly sunny.
City: Max 24
Mandurah: Max 23

UV Alert: 8:10 am to 3:50 pm, UV Index predicted to reach 11 [Extreme]
Fire Danger: Coastal Plain: LOW-MODERATE
Hills: LOW-MODERATE

Thursday Shower or two. Min 15 Max 24
Friday Chance of a morning shower. Min 15 Max 23
Saturday Mostly sunny. Min 12 Max 25
Sunday Sunny. Min 13 Max 28
Monday Sunny. Min 14 Max 29
Tuesday Sunny. Min 15 Max 30