PUNE: IMD indicated on Thursday a potential revival of southwest monsoon between June 12 and 18, following a stall since May 29. An IMD official said a system may form over Bay of Bengal on June 12-13, though uncertainties persist due to conflicting model outputs. “Some models suggest a system formation, others do not. We are not confident enough to include it in our forecast yet,” the official said.The extended-range forecast, however, points to a monsoon revival during the specified period, irrespective of whether a system forms or not. Post-revival, the IMD anticipates robust rainfall across central India, parts of Maharashtra and south peninsular India (parts where monsoon has already advanced).Distribution will be key to monsoon’s progress: IMD The forecast brings hope to regions grappling with dry spells as monsoon’s progress has been sluggish over the past week. The IMD official said: “The monsoon’s advance across other regions post-revival will hinge on rainfall distribution and establishment of monsoon winds.”An extended range forecast by IMD indicated that southwest monsoon was likely to advance over some more parts of central and east during the week June 12 to 18. For the same week, it said fairly widespread to widespread rainfall with isolated heavy falls were likely over many parts of south Peninsular and adjoining central India due to the strengthening of westerly winds and likely development of an off-shore trough off the west coast.Overall rainfall activity was likely to be above normal over south peninsular India; normal to above normal over many parts of central India and below normal over northwest, east and northeast India from June 12-18, the IMD extended range forecast stated.Private forecaster Skymet Weather Services, however, expressed greater confidence in the formation of a monsoon system over Bay of Bengal. “A precursor cyclonic circulation is expected to develop over the west-central Bay of Bengal by June 10. It will take another 48 hours for reorganisation and consolidation,” Skymet president G P Sharma said. According to Sharma, the system is likely to trigger weather activity along the coastline from June 11. “The weather system may track slightly south of its usual path, moving across Andhra Pradesh, Telangana, Karnataka and Maharashtra.” Skymet predicted the monsoon revival window to span from June 12 to 17, covering most of south peninsular India.