And Logan have a terrific volunteer-run weather station, using some BOM info and some of their own. http://www.loganvillageweather.com/ even though Logan is quite a way from here (Deception Bay) it's still good to check out if you're a bit of a 'weather junkie' ;-)
One thing we always do when thunderstorms threaten, is remove the phone line from the modem and shut down the computers.
My partner had a lightening strike at a previous house which hit some tree roots and got into her phone line and blew her computer power supply and a few other electrical gadgets. It's cheap insurance to remove the phone connection and the power plugs, any other surge protectors you might have notwithstanding. Lightening is tremendously powerful and surge protectors are OK but not 100 percent protection.
The desperation-alternative to tank water is rinse water from the washing machine. I have a 200L ex-pickled onion barrel with a tap to which clicks the 1 inch purple low-pressure hose. I bought it originally as a pump-out kit complete with motor from an irrigation guy in Caboolture. I sold the pump because it shot water high into the air, used up 200L in nothing flat and the garden was still as dry as it was. So, being on a slope, using gravity turned out to be a good idea. There's a tap at the end of 20metres of purple hose and it delivers water right to the end at a good enough rate to be useful. It even works in the backyard which is more or less flat but with the drum on a concrete brick, gives just enough head to make it all work. Two hundred litres of semi-clean water is rather better than no water at all.
Someone must have got that rain but it was not us - if we got 1 mm that's it.
Good to know there's a high possibility of us getting more rain.... we had a lot of thunder early arvo yesterday, and we started shutting windows when the downpour started, but it finished before we closed all the windows. It was that short the ground's only wet on the very top! Was so disappointed..