I was at a BBQ in Healesville for lunch on Saturday and was expecting storms to develop over the ranges by about 3pm or so. Fortunately for all the people at the BBQ (and unfortunately for me) the cap help strong and nothing developed except for the stuff down in the SE of the state (initiated no doubt by the higher moisture levels in the east and also the ranges of the Baw Baw National Park).  I left Healesville at about 4:30pm and upon getting into clearer views could see very weak and small Cb's developing over the NE and E suburbs of Melbourne and some nice congestus was popping up tot he W and NW of the city.  Over the next hour or so, cells developed over the outer western suburbs near Melton and Sunbury.  These cells drifted slowly ESE and the northern most cell moved over my area (Greensborough), with the southern cell moving over the city.  The highest rainfall I have heard from these storms was Preston with 24mm.  Thanks to the slow movement of the storms, I had constant thunder at my place for nearly an hour and it rained moderately for a while as the core of the cell passed over.  I recorded 5mm of rain from it and had plenty of nice (but not overly close - only 1 or 2 within 1km) rumbles of thunder.