I remember Alby well. I was in the Northern Wheatbelt at that time. Had my C180 locked into a machinery shed, and sandbagged all the doors of the house. despite this, everything filled with red dust from further north. It was inside vehicles and inside the 180 despite them being shedded and closed up. Took some time with a compressor and gun to blow the dust out of engine bays and the cabins.
Not only did 'mulla mulla' spread all over the wheatbelt, but both species of melon - the Afghan and the Paddy sprung up all the way to the south coast. We had only seen the very first 'mintweed' in 1978, but it too spread allover the country with Alby. And so began 'summer' weed spraying in the WA wheatbelt.
Olwyn missing the wheatbelt was a blessing. happy days,