A near-stationary low pressure trough lying over southern Queensland and northern New South Wales is being fed by humid northeasterly winds, triggering showers and thunderstorms. Across the last 24 hours, 28000 lightning strikes have been recorded, with 25000 of these over southern QLD. Some of these thunderstorms have been severe, triggering heavy rainfall, strong winds and large hail. The northeastern corner of NSW recorded the highest rain totals, with widespread falls of 30-50mm. Myocum near Byron Bay recorded the highest rainfall of the two states with 99mm. Yamba also recorded 54mm, making it the town's highest December rainfall in 3 years, with 22mm falling in just 10 minutes. In QLD's Wide Bay and Burnett Gayndah recorded 34mm, with 9mm of this falling in 10 minutes. This was also the town's highest December rainfall in 2 years. West of Brisbane, golf ball size hail was reported at Gatton, with strong winds and 3cm hail also reported at Clifton. The trough is expected to remain near stationary for the next week, triggering showers and thunderstorms across the region until at least Boxing Day. Flash flooding, damaging winds and large hail remain a risk on each day, although the slow moving nature of the storms means flash flooding is the greatest chance. Brisbane can expect its best chance of a rumble on Friday as the trough edges closer to the coast.