A storm dumped more than 20 millimetres of rain on Warrnambool last night and the Bureau of Meteorology says it's just a taste of what's to come.
Warrnambool recorded 24.5mm of rain overnight on Tuesday.
Peak wind gusts reached 50km/h at 5am and the temperature dropped to 9.5 degrees overnight but it felt like 5.6 degrees.
Hamilton has seen about 23mm of rain since 9am Tuesday, Port Fairy 17mm and Portland 1.2mm.
The Bureau of Meteorology website said the wet and wild storms were expected to continue through to the weekend, with a 70 to 80 per cent chance of showers on Saturday and Sunday, possible hail and overnight temperatures falling to between three and six degrees.
It's been a wet month for Warrnambool, with 65.6mm of rain for the month so far.
Tuesday recorded the highest downpour for the month, behind May 1, which was hit with 23.4mm in a 24-hour period.
There was 95mm of rain in May last year, with the biggest downpour reaching 19.4mm in one day.
The Warrnambool SES did not receive any call outs overnight on Tuesday but a volunteer has been sent to Geelong to assist units there.
Geelong recorded more than 9mm of rain in just two hours with the most falling between 1.30am and 3.30am and SES volunteers responded to 150 calls for help.
Rain will continue to fall across the south-west on Tuesday with a very high (95 per cent) chance of showers, most likely during this afternoon and evening.
There will be possible hail near the coast later tonight and winds west to northwesterly 25 to 35 km/h are expected to turn southwesterly 20 to 30 km/h in the late afternoon.
Daytime maximum temperatures will hit 14 degrees.
Sheep graziers are warned that cold temperatures, showers and southwesterly winds are expected during Wednesday and Thursday.
There is a risk of losses of lambs and sheep exposed to these conditions.
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