ABOVE: Nat Chapman took this stormy shot at Woodburn a month ago.
A trough of low pressure over western NSW will deepen to form a low-pressure system on Thursday, the Bureau of Meteorology has reported.
This low will interact with humid air to bring widespread rain to much of the state and heavy falls in the Northern Rivers.
Showers will contract to the east on Friday as the low reaches the Tasman Sea. The next cold front is forecast to cross the south on the weekend.
The forecast for Thursday, November 11 is cloudy with a 95% chance of rain.
There is a chance of thunderstorms in the afternoon and evening.
Friday is expected to be cloudy with a high chance of rain including thunderstorms in the evening.
Rainfall for November so far
Total in November 2020: 3.2mm
Evans Head 13.4mm
Total for November 2020: 11.6mm