"Under the influence of the cyclonic circulation over northwest and adjoining west-central Bay of Bengal, a low pressure area has formed over the northwest Bay of Bengal off Odisha and West Bengal coasts this morning," it said.
Thundershower would occur at many places in Odisha during the next 24 hours. The rainfall will further increase after 24 hours, it said.
The release also warned of heavy rainfall at one or two places in south Odisha during the next 24 hours.