A cyclonic circulation lies over east-central Bay of Bengal and neighbourhood and, under its’ influence, a low pressure area is likely to form over central Bay of Bengal during next 24 hours, the Regional Centre of India Meteorological Department (IMD) here said on Friday. The system is very likely to move west-northwestwards and concentrate into a ‘Depression’ during subsequent 48 hours.Under its influence, several parts of State would experience heavy to very heavy rainfall between September 12 and 14. An Orange Warning for several districts has also been issued, said IMD.Issuing a yellow warning, weather office said heavy rainfall is very likely to occur at one or two places over districts of Koraput, Malkangiri, Nabarangpur and Kalahandi. Heavy rains are very likely to occur at one or two places over the districts of Gajapati, Ganjam, Malkangiri, Koraput, Jagatsinghpur and Kendrapada. The IMD issued an orange warning and said heavy to very heavy rainfall is very likely to occur at one or two places over districts of Puri, Khordha, Jagatsinghpur, Kendrapada, Cuttack, Ganjam, Nayagarh, Bhadrak and Jajpur on September 13. Besides, heavy rains are very likely to occur at one or two places over the districts of Baleswar, Dhenkanal, Nabarangpur, Kalahandi, Angul, Boudh , Kandhamal, Nuapada, Kandhamal, Nayagarh, Cuttack, Dhenkanal, Keonjhar, Mayurbhanj, Jajpur, Jharsuguda and Sundargarh on Sept 14.