The cyclonic storm 'Gaja' is set to make landfall in Tamil Nadu today. The cyclonic storm will hit the Tamil Nadu coast between Cuddalore and Pamban. 'Gaja' that lay over southwest and adjoining southeast and west central Bay of Bengal is about 480 km north east of Nagapattinam and is very likely to cross coast between Pamban and Cuddalore on Thursday evening or night with a wind speed gusting upto 100 kmph, the Met office said.