Sri Vijaya Puram, Aug. 19: Thunderstorm with gusty wind (30-40 kmph) and lightning is very likely to occur at one or two places over A&N Islands on Aug. 20. Due to squally weather with surface wind speed reaching 35 to 45 kmph gusting to 55 kmph is very likely along and off A&N coast and over Andaman Sea. Sea condition is also likely to be rough to very rough. Local Cautionary Signal- 3 has been kept hoisted at Sri Vijaya Puram Port.