State Emergency Service (SES) spokesperson Phil Campbell said about 8pm Saturday the SES was alerted by a resident who believed "a tornado had destroyed parts of her house".

There had also been requests for assistance in the immediate area with reports of roofs damaged and trees down.

"We sent our Gilgandra and Coonamble units there and they had support from the police and Rural Fire Service," Mr Campbell said.

"Our Coonamble unit advised there was one property with the roof of its main building blown off, and quite a lot of damage to the property as well as a car covered in rubble.

"An elderly person at the property was taken into care in Gilgandra. There were no reports of injuries."

Meanwhile, about 7.15pm Saturday the driver of a B-double travelling on the Castlereagh Highway between Armatree and Gilgandra lost control of truck, which ran off the road and jackknifed in what was reportedly a strong gust of wind.

Bureau of Meteorology forecaster Mick Logan said the SES and Bureau of Meteorology had been liaising with the SES following reports a "line of storms" had gone through the area.

"We don't have radar close enough to the area to be definitive, it could also have been wind caused by the thunderstorms but it's entirely possible it was a tornado, it wasn't the only report of one we had," he said.

"With this sort of thing you might see one or two houses in its path, in a line say, 100m wide, then minimal to no damage either side of that.

"In Australia our tornados are obviously on a smaller scale than in the US, and the damage path can be really localised."

Sylviane Riley's property was hit on Saturday night while she was in Sydney undergoing cancer treatment. She said she was "very upset" but there was not much she could do about it.

Her son Jamie drove to Armatree to survey the damage with relatives and to begin the clean-up.

He told the Daily Liberal a granny flat attached to a caravan on his mother's property had flipped on its roof and been completely destroyed.

"Thankfully it hasn't been used for years and there was no one hurt, but if there was someone inside it could've been a completely different story," he said.

"Mum's actual house is fine except for a bit of damage on the roof. And the clothes line has snapped. But the animals are all right.

"I was just dumbfounded as I drove in and saw how some pretty big trees have been ripped out and there's a metal power pole in the yard that's bent over.

"There's a house at the end of the street, its carport is destroyed and the roof is off.

"There's rubbish and stuff spread everywhere, and looking at the destruction path it's hard to believe it wasn't a tornado.

"My uncle reckoned it sounded like a freight train running through. Just looking at this mess, it would've been scary as hell."