Dry weather conditions since mid-winter across north east NSW have resulted in record, or close to record low rainfall totals for many locations, with Lismore showing the lowest rainfall in the area – totalling 18.2mm.

The data, complied by Northern NSW Severe Weather show combined rainfall over August, September and October.

For Lismore, when these three month totals were added to the July rainfall, we see that only 19.6mm has fallen in the past 115 days.

The three month total is only 0.1mm more than the record dry-spell for Lismore for the same months, which was set in 1941 - a year remarkably similar to 2019 overall.

The three-month totals from August 1 to October 31 in the region are between 10 and 25% of normal for this period.

Three-month totals from August 1 to October 31:

18.2mm at Lismore

53.8mm at Murwillumbah

72.0mm at Byron Bay

61.2mm at Ballina

56.4mm at Casino

50.6mm at Grafton

37.8mm at Tabulam

33.6mm at Tenterfield

51.2mm at Glen Innes

32.4mm at Armidale

34.2mm at Inverell

Currently, an active trough system is crossing into NSW and the Bureau of Meteorology is predicting a chance of a thunderstorm Monday and Tuesday, with a 40% chance of showers by the afternoon and early evening of Tuesday.

These thunderstorms have the potential to deliver widespread falls of around 20mm, with some places likely to see close to 50mm.

Maps from Bureau of Meteorology show October totals, August-October Rainfall totals, and August-October Deciles.