HAILSTONES were reported in central Singapore between 3.15 pm and 3.45pm on Thursday.
The Straits Times received at least three calls from readers in Bishan and Toa Payoh regarding the phenomenon.
In a statement, the National Environment Agency Meterological Services said that hailstones form in intense thunderstorm clouds which occur all year round in the tropics.
It added that generally, the hailstones would have been melted before they reach the ground. However, in the presence of a strong downdraft in an intense thunderstorm, the hailstones can be brought to the ground rapidly without melting.
The last hailstone incident was reported on July 27 last year.