The system which moved northwestwards with a speed of 5 kmph during the past six hours and intensified into a cyclonic storm lay centered at 5.30 am at about 300 km east-southeast of Puducherry, 310 km southeast of Chennai, 440 km southeast of Nellore, 550 km south-southeast of Bapatla and 550 km southsoutheast of Machilipatnam, the weather agency said.