Severe storms have delivered the heaviest December rain in years to some parts of northern NSW and there are more rumbles on the way. Thunderstorms flared up over northern NSW on Wednesday evening, bringing very heavy rain and blustery winds to the Northern Tablelands and Northwestern Slopes and Plains. To 9am on Thursday Glen Innes had 50mm, 5mm of which fell in just ten minutes. This was their second highest December rain in at least 16 years. To the north, Emmaville received their highest December total in eight years, with 53mm in the gauge. Elsewhere, Guyra had 22mm while Pindari Dam picked up 34mm, replenishing falling storage levels. Blustery winds tore through the North West Slopes and Plains with the storms. Gusts of over 80km/h were recorded in Tamworth, Gunnedah and Moree. Thunderstorms are once again expected to spark up in roughly the same regions today, bringing a risk of flash flooding and damaging winds. On Friday another trough pushing up the NSW coast will move the main area of instability to the far northeast of the state and into southeast Queensland.