Port Blair, Dec. 18: As per Indian Meteorological Department’s weather forecast, thunderstorm or lightning is likely to occur at one or two places over Nicobar Islands on Dec. 19. Due to squally wind speed reaching 40-50 kmph, fishermen have been advised not to venture into South Andaman Sea till Dec. 19, 2022.      For further enquiries / information, one may contact helpline of State Emergency Operation Centre at Helpline No. 1070 & District Emergency Operation Centre at Helpline No. 1077. For any assistance, call Coast Guard, SAR Agency at Toll Free No. 1554.