State Emergency Service units across the south-west remain on alert with a severe weather warning in place for damaging winds.

SES south-west duty officer Michael Boerner said there were 24 call outs across the region since Tuesday evening.

He said the majority of calls involved fallen trees and two requests for assistance were for minor damage.

Mr Boerner said there had been "four of five" trees down in the Heywood area, including trees that had partially blocked the Princes Highway.

"There was nothing major, the trees didn't completely block the highway. There was at least part of one lane open," he said.

"Most of the call-outs were Tuesday evening, between 7pm and 8pm, up to 11pm."

There were requests for help at Scotts Creek, Cavendish, Simpson, Drumborg, west Portland, Willatook, Warrnambool, Port Fairy, Hamilton and Cobden.

Mr Boerner said with the Bureau Of Meteorology severe weather warning still in place, the SES was expecting more call-outs on Wednesday.

"We're expecting the same again tonight as last night. The weather warnings are all still out there," he said.

Earlier: State Emergency Service units across the south-west remain on alert with more damaging winds expected during Wednesday.

Warrnambool unit controller Giorgio Palmeri said there was only one call-out in Warrnambool overnight.

He said volunteers were called for assistance after the metal capping on a garage roof came loose at a property off Tozer Road at 8.30pm Tuesday.

"The capping was secured," he said.

"The wind was pretty incredible and there were call-outs at Hamilton, Port Fairy and Cobden.

"The main damage happened elsewhere, particularly closer to Melbourne."

Mr Palmeri said the severe winds were expected to continue on Wednesday, associated with another cold weather front passing across the state.

"We're on alert and ready to assist," he said.

The Bureau Of Meteorology has issued a severe weather warning for damaging northerly winds, averaging 50 to 70 km/h with peak gusts of 90 to 100 km/h, across the south-west.

There's also possible hail, showers and thunderstorms, although winds are expected to ease below warning thresholds by early Wednesday evening.

Strongest wind gusts this morning included 105 km/h at Mount William at 7:01pm, 85 km/h at Warrnambool at 3.39am and 87km/h at Mount Gellibrand at 7.40am.

The State Emergency Service advises that people should:

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