Blackouts were widespread, with customers in Bathurst, Orange, Canowindra, Dubbo, Elong Elong, Trangie, Gilgandra and Gulargambone still without power by 7.30am on Wednesday.

The Bureau of Meteorology issued a severe weather warning ahead of the storm and recorded wind gusts of up to 87km/h in Bathurst, 74km/h in Orange, 61km/h in Young and 48km/h in Lithgow.

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State Emergency Service (SES) crews reported trees down in Orange, while a home at Moorbel near Canowindra had its roof blown off.

"We also received a call to back-up Canowindra SES Unit with some specialist working at heights operators for a job at Moorbel near Canowindra after reports a house had its entire roof torn off," Orange City SES reported.

The fast-moving thunderstorm meant rainfall totals were quite low in many locations, with the exception of Orange.

During the storm the colour city received 36.8 millimetres in just 50 minutes, with a total of 37.8mm recorded by 7.30am on Wednesday.

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Young received 14.8mm of rain, while 14.4mm fell in Lithgow and 12.2mm in Bathurst.

Other locations received far less, including: Goulburn (2.4mm), Mudgee (0.6mm), Dubbo (0.2mm) and Cowra (0.2mm).

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With storms predicted to continue in coming days, the SES has urged people to stay safe.

"Stay clear of fallen power lines, never drive, walk or ride through floodwater, check the condition of your guttering and downpipes and make sure they are clear," the volunteers urged.

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