Great shots .... what time of the night were they taken. You're only 11kms from me so we would have been in the same part of the storm.
I was outside watching as well .... looking in glee at my watertank overflow diverter pooring water all over my lawn as the tank was full to the brim

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For your 30sec exposures, did you simply do this so that you would capture some lightning bolts in that timeframe?
I didn't think to get the camera out, but will next time as you've inspired me to try this ..... just might have to wait a few years for another storm like that in the Melbourne