Eastern Australia is set to enjoy a very stormy week, with some parts of New South Wales and southern Queensland likely to see their best rain in months. Anywhere stretching from Tasmania to Queensland is a good chance to see at least a rumble this week as a series of low pressure troughs combine with a buildup of moisture over the nation's east. The first of these troughs is affecting the region today, and brings Tasmania's and Victoria's best chance of thunderstorms for the week. Thunderstorms are already affecting both states this morning, and are likely to continue into the afternoon and evening. Thunderstorms will also fire up over NSW and QLD today as well, most likely along the slopes and ranges. The least stormy day of the week will be Tuesday as the trough weakens, although thunderstorms will still develop on the NSW and southern QLD ranges. From Wednesday another trough from the west will link up with the one in the east, bringing widespread thunderstorms each day over northeast VIC, NSW and southern QLD until at least Sunday. By the end of the week some parts of NSW and QLD are likely to have seen 50-100mm, with potential for isolated falls of 100-200mm in locations affected by particularly heavy storms. While the parched soil from a long spell of dry weather means widespread flooding is unlikely, flash flooding is a good chance. In fact, flash flooding is a particularly significant risk after a long period of dry weather as the soil hardens, allowing any water to rapidly run off over the land. Thunderstorms also bring the risk of large hail and damaging wind gusts, most likely over the NSW and southern QLD slopes and ranges. Thunderstorms are likely to become less widespread from next week as a ridge of high pressure develops.