Update Thursday 3.30pm:
The weather bureau says gale force winds could affect parts of the Grampians on Friday afternoon.
Senior forecaster Michael Efron said he expected a severe weather warning to be issued for the Mallee District on Friday, but the National Park and the south west coast could also experience strong winds of 50 or 60 kilometres an hour.
It follows Mr Efron forecasting snow for the Grampians on Wednesday.
It might now be spring, but wintry conditions are likely to return to the Grampians later this week.
Bureau of Meteorology senior forecaster Michael Efron said cold weather meant snow was likely on peaks above 900 metres in Victoria on Friday.
"It won't just be right on the peak but a little way down as well," he said.
"The coldest air should be coming through between late morning and early afternoon on Friday.
Mr Efron said the mountains would likely receive between five and 15 milimetres of rain between Wednesday and Saturday.
"Across the broader Wimmera totals will be around the five to 10 milimetre mark, so it won't be a significant rainfall but more of a top up" he said.
It follows snow falling on the national park at least three times across autumn and winter in 2019.
Halls Gap business owner Adrian Manikas said he wasn't sure whether the chance of snow influenced tourists' decision to come to the region.
Mr Manikas is the managing director of adventure company Absolute Outdoors.
"No one really expects it so when snow does come there are some cool images," he said.
"Colder mornings make it harder to run activities school programs in winter, when there are fewer hours of daylight to do fun stuff."
Mr Manikas said he had noticed tourism had started to increase in the Grampians during the winter months in recent years.
"Visitors are spreading out into the traditional troughs of seasons - now they might do a half-day walk and spend the afternoon in a cafe," he said.
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