Port Blair, April 9: Thunderstorm with lightning and gusty wind (speed reaching 30-40 kmph) is likely to occur at one or two places over A&N Islands on April 11. For further enquiries/information contact helpline of State Emergency Operation Centre at Helpline No. 1070 & District Emergency Operation Centre at Helpline No. 1077. For any emergency/assistance at sea, call Coast Guard SAR Agency at Toll Free number 1554.