Residents are advised to remain calm and look for 'power pellets' or Cherries.
Ok, there's actually no warning of course! It appears one of the local radar images for Mildura didn't blend so well for the national imagery and appear as a large circle with a wedge missing.
You might still be able to see it at http://www.bom.gov.au/products/national_radar_sat.loop.shtml
Otherwise, here's a GIF animation of the radar loop:
Otherwise, here's a GIF animation of the radar loop: