The local weather agency in Surabaya, East Java, has issued a warning of the possibility of a hailstorm in the province in the next few days.
Samsul Arifin, head of data and information at the Meteorology, Climatology and Geophysics Agency, told tempointeraktif.com that the agency also warned of possible whirlwinds, while heavy rains are expected throughout the province in the coming days.
Hail, although occurring rarely in the tropical archipelago, was a normal phenomenon and not a sign of extreme weather.