Sri Vijaya Puram, Oct. 30: Heavy rain (07-11 cm) is very likely to occur at one or two places over Andaman Island and thunderstorm with gusty wind (30-40 kmph) and lightning is also very likely to occur at one or two places over A&N Islands on Oct. 31 & Nov. 1. However squally weather with surface wind speed reaching 35-45 kmph gusting to 55 kmph is very likely over North Andaman Sea. Sea condition is also likely to be rough. Fishermen have been advised not to venture into the sea along and off North Andaman Sea on Nov. 2 & 3.