Roofs on multiple houses and two hotels were damaged as wind gusts were recorded at speeds of more than 100km/h at both Dubbo and Trangie.

Trees fell on roads and property, and power was cut to more than 2135 customers in the wider Dubbo area, Essential Energy reported.

The State Emergency Service (SES) received dozens of call-outs from an area including Dubbo, Nyngan, Nevertire, Trangie, Warren, Narromine and Gilgandra.

SES western zone commander David Monk called the event "definitely a severe thunderstorm", and probably the worst in the region for about two years.

At Nyngan there were three jobs on Saturday night, with one roof coming off, he said.

The storm continued eastwards, where a village in its path bore the brunt.

"Nevertire seems to be the place that got hit the hardest, they've got 10 jobs in total that we've had out there, including the Nevertire Hotel roof, part of that came off last night," he said.

"The rest of them were mainly trees on houses or trees on roads."

At Warren there were four jobs, and in the Narromine Shire a total of 18 jobs, "mostly trees down on roads and on houses, sheds", Mr Monk said.

"They did have part of the top storey verandah awning come off the Royal Hotel in Trangie, and they've also got three houses with damaged roofs, not completely missing but certainly significant damage there," he said.

At Dubbo the SES had 18 jobs in total, among them a house with half a roof blown off, Mr Monk said.

"They've had mainly trees on roads, houses, car ports, you name it, trees down everywhere," he said.

Gilgandra had 15 jobs in total, with about three roof jobs, but the majority was trees down along the highway and local roads, the SES leader said.

"So the crews have been pretty busy last night, most of them are operational again this morning, as first light came, a lot of people started to actually get a bit of an idea about what happened," Mr Monk said.

"So most of the units have received new jobs this morning, once people wake up and can see the trees are down and things like that."

Darkness and rain - 23.2mm was recorded by the Bureau of Meteorology at Dubbo in the 24 hours to 9am Sunday - added to the difficulty of the task for the SES volunteers, Mr Monk said.

"And we had driving winds last night, and for some of our crews it was too dangerous to get up on roofs with tarps, to do any tarping last night, just because of the severe winds," he said.

More than 5500 electricity customers including 2135 customers in the wider Dubbo area lost power in Saturday night's severe storm but crews had restored power to the majority of them by Sunday afternoon, an Essential Energy spokeswoman said.

Strong winds brought down trees and blew roofs into power lines, causing significant damage to the electricity network, she said.

Crews responded quickly, working through the night in challenging conditions, and by 1.30pm Sunday, had reduced the number of customers in the Dubbo area affected by unplanned outages to 577, she said.

Essential Energy has deployed additional crew members and resources from other areas to assist with restoration efforts.

Due to the strong winds, a helicopter is assisting to patrol the electricity network to ensure there are no further fallen power lines, and crews continue to work as quickly as safety allows to progressively restore power to customers as soon as possible, the spokeswoman said.

Essential Energy reminds customers to report fallen powerlines by calling 13 20 80 and to stay at least 8 metres away from fallen powerlines and anything in contact with them.

Customers are encouraged to visit Essential Energy's website essentialenergy.com.au/outages for updates on outages affecting them.

Essential Energy thanks the community for their understanding patience as crews work to restore power for all customers following the storms, the spokeswoman says.

EARLIER:

Roofs on multiple houses and a hotel have been damaged as a wild storm swept through the Orana region on Saturday night, authorities report.

Trees also fell on roads and properties, and the State Emergency Service (SES) received dozens of call-outs from Dubbo, Nyngan, Nevertire, Trangie, Warren and Gilgandra.

Wind gusts at Dubbo hit 106km/h at 7.40pm and continued at the speed for six minutes, Bureau of Meteorology data shows.

An Essential Energy map showed large parts of the region with unplanned power outages on Saturday night and into Sunday morning.

SES western zone commander David Monk said the village of Nevertire had borne the brunt of the storm.

"Nevertire seems to be the place that got hit the hardest, they've got 10 jobs in total that we've had out there, including the Nevertire Hotel roof, part of that came off last night," he said.

"The rest of them were mainly trees on houses or trees on roads."

At Dubbo there had been 18 jobs in total by Sunday morning.

More to come.