A line of intense thunderstorms moved through parts of central and northern NSW on Monday afternoon. The band of storms storms developed along a trough of low pressure that is crossing the state from west to east today. Dry westerly winds in the wake of the trough forced warmer, moisture-laden air ahead of it to rise rapidly, producing violent storms. A particularly dangerous storm cell caused extensive damage in Kurri Kurri early this afternoon, with reports of roofs torn from buildings and uprooted trees. A weather station at Murrurundi Gap in the Hunter District registered a wind gust of 100km/h shortly before 2pm, around the same time a different storm cell produced 11mm of rain in 10 minutes at Cessnock. For the second day in a row, large hail has fallen in NSW. Hailstones measuring 4cm in diameter - roughly the size of a golf ball - slammed into the ground at Narrabri shortly before 3:30pm. The band of severe storms will continue to move through the state's northeast this afternoon and tonight. Visit http://www.weatherzone.com.au/warnings.jsp for the latest warnings.