Parts of Jharkhand could experience heavy to very heavy rainfall from Thursday night under the influence of cyclonic storm ‘Dana’, a Met Department official said.

An ‘orange’ alert has been issued in the Kolhan region (West Singhbhum, Seraikela-Kharswan and East Singhbhum districts) for Friday, he said.

This category of alert indicates heavy rainfall ranging from 115 mm to 204 mm in 24 hours, the official said.