People in the New South Wales south east have been told to enjoy today's mild temperatures because there are dark clouds on the horizon.
The Weather Bureau says temperatures will be around 20 degrees today but cold air from the south will see a rain depression forming off the far south coast tonight.
Duty forecaster, Sean Carson, says the region could see falls of up to 100mm in 24 hours.
He says the region will begin to feel the effects this afternoon.
â??There is a cold front approaching the region,â?? he said.
â??It is in Victoria and South Australia now but certainly by later this afternoon we can expect a couple of showers about the Snowy Mountains.
â??They will be fairly light up until sunset but they will certainly increase once dark falls over the Snowy Mountains and Monaro region.â??
© ABC 2012
16:39 EST The mercury soared in the nation's southwest today with Perth recording its hottest September day on record, however heavy rain and cooler temperatures will arrive on Sunday.