Just for reference, I measured 25mm of rain. I'd say about 20mm of that fell in a 10 minute period, so very heavy rain rates.Yep was very nasty on approach, black skies with slight green tinge, west of Parramatta. Done and dusted now.
There was a torrential downpour with some pea sized hail bouncing in the grass, some close lightning but surprisingly no wind. Overall == very nice start to October.