POWER outages, trees down and leaking roofs were left in the wake of the storm which swiftly battered the Hunter Region on Monday.
The Bureau of Meteorology issued a weather warning about 2.30pm for hail, strong winds and rain causing potential flash flooding and within minutes the first areas of the Lower Hunter were hit by the storm cell.
NSW State Emergency Service received 177 call-outs in the Northern Region as a result of the deluge.
"Maitland was the worst affected area with 67 jobs since the start of the weather event," a NSW SES spokeswoman said.
"This was followed by Singleton with 28. It was mainly trees down and roof damage."
Crews worked through the night and had less than 30 outstanding jobs to attend to on Tuesday morning.
Several locations were still without power after the storm, including Bolwarra, Bolwarra Heights, East Maitland, Muswellbrook and surrounding areas.
Ausgrid has called for patience while crews work to fix the damage and restore power to those areas.
The bureau has forecast more showers for the region on Tuesday, most likely during the afternoon and evening, with the chance of another storm cell in the afternoon.
Daytime maximum temperatures are expected to reach 30 degrees Celsius. A high pressure system over the Tasman Sea and a low pressure trough over eastern New South Wales is the cause of the current weather. This pattern is drawing humid air down from the tropics, which is interacting with the trough to generate unsettled conditions.