The Bureau of Meteorology has confirmed that a tornado, with winds in excess of 150km/h, has impacted the town of Lennox Head between 7:30 and 8am this morning.

The SES said the tornado has cut a swathe of damage through parts of Lennox Head close to the beach with streets affected including Pacific Pde, Stewart St, Gibbon St and Ian Ave.

The SES has received in total 78 requests for assistance from Lennox Head of which most remain outstanding. Assistance is being provided to the SES by the Rural Fire Service and the NSW Fire Brigades and the NSW Police.

Approximately 12 properties have suffered very significant damage. These properties may be uninhabitable and may require engineering assessments.

An evacuation centre has been established by Community Services. This is located at the Bowling and Sports Club in Stewart Street.

The NSW Ambulance Service has advised that two persons were transported to hospital with minor injuries. There were earlier reports of one person missing, this person has since been located safe and well. The Ambulance Service has had three ambulances on standby.

Elsewhere, heavy rain in the hinterland behind Mullumbimby has resulted in some water across roads. The school at The Pocket is closed due to flooding of access roads. Heavy rain is expected to move slowly southwards today.

The SES has placed volunteers and staff on standby. Volunteers are ensuring that they are in full operational readiness for the forecast rain and possible flooding.

According to the Bureau of Meteorololgy, a trough lying off the New South Wales North Coast deepened overnight, leading to the development off a low pressure centre off the coast.

Widespread showers and rain are expected over the north-east of the state during this time, with the chance of local thunderstorms. Later today and on Friday the low is forecast to move slowly south, before moving away to the Tasman Sea on Saturday. 

A Severe Weather Warning has been issued for very heavy rain that is expected to cause flash flooding along the area of coast and adjacent ranges between about Yamba and Kempsey.