It's barometer busting times over the next few days in the southeast, as low pressure systems rule. A low that has been delivering flooding rain to Queensland over the last week, has sunk south and is dropping huge totals over New South Wales. Late on Thursday, heavy rain was affecting Broken Hill. The town was saturated by heavy falls of up to nine millimetres in ten minutes. At 9am today, the 24 hour total of 97mm went down as the wettest day in 21 years. A similar story was seen at Cockburn where a huge 126mm was taken, also a 21 year high. So where now? The inland low is being drawn south, like a moth to a flame, towards a larger Southern Ocean low. Over the weekend the resulting, combined system will tear into South Australia and Victoria, bringing heavy rain and storms, with some totals easily pushing over 40mm. On Monday the low will sink south again, past Tasmania and wander into the path of yet another frontal system. As a result, the low will deepen rapidly, sending gales and more rain over Tasmania and southern Victoria. By midweek, the low will have moved away from the windswept southeast. The weather will then settle down under calming influence of a high.