Bellinger River on flood watch
THE Bellinger River Valley is again on flood watch for the second time this year.
More than 50mm of rain has fallen on Dorrigo Mountain over the past 24 hours, the Bureau of Meteorology reports.
The downpours have swollen already inundated creeks and river systems, which were under flood watch last week.
The wet weather has also led to several incidents on the roads.
Police are this morning organising for road crews to clean out drains on the Pacific Highway south of Coffs Harbour which have been clogged by leaf litter.
A large amount of water has pooled over the south bound lanes between Lyons and Deans rds.
Drivers are urged to slow down to avoid aquaplaning.
Further west and a fallen tree has held up traffic on the Waterfall Way, 12km west of Dorrigo.
Emergency services have also responded to a car accident on the Pacific Highway at Warrell Creek while tow trucks are attempting to shift a truck which has broken down on the Dirty Creek Range.
Local State Emergency Service crews have been told there is a greater than 70% chance of minor to moderate flooding as well as local flash flooding today.
More heavy rain is forecast.
A broad low pressure trough lies over inland parts of NSW while another trough lies over the northern Tasman Sea.
The offshore trough is expected to move closer to the coast and deepen on Monday.
This will combine with an upper disturbance and strengthening onshore airstream triggering possible local heavy rainfall for parts of the mid-north coast today.
Spring (king) tides are current and are expected to increase the risk of flooding in low lying areas near the coast.
Weather forecasters say there should be little let up in the rain this week.
"Every day this week northern NSW can expect heavy rain, leading to significant flooding through both coastal and inland regions," The Weather Channel Senior Meteorologist Tom Saunders said.
"For many areas the rain will be the heaviest since last summer. Weekly rain totals are likely to exceed 100mm along the east coast from Cooktown to the NSW Mid North Coast.
"For south-east Queensland and north-east NSW the totals should exceed 200mm, prompting a flood alert for the Bellinger, Macleay and Hastings river valleys.
"We are not certain exactly when the rain will clear but it won't be until at least Sunday," he said.