© Lauren CrespHailstones blanket Bruce Hewett's property at Glossop, South Australia.
Wind gusts of up to 70kph were recorded during the storm, which hit the area about 6pm on Monday.
"It would be hundreds of millions of dollars of damage," Neville, a local farmer, told ABC Radio Adelaide on Tuesday.
He said the storm had swept through the towns of Murray Bridge, Swan Reach and Wynarka.
Other properties hit were in Barmera, Monash and surrounds, where farmers grow crops including stone fruit, nuts and grains.
At the Renmark Airport weather station, nearly five millimetres of rain was recorded in less than half an hour.
A severe thunderstorm warning for damaging winds and large hailstones was issued by the Bureau of Meteorology about an hour before the storm hit.
Comment: Erratic seasons and extreme weather devastating crops around the world
Crop and cattle losses are on the rise everywhere, whether it is due to extensive drought, massive hail, epic flooding, huge dust storms, unexpected frosts, and even epidemics.