Cyclonic storm 'Gaja' over the Bay of Bengal is set to make landfall between Cuddalore and Pamban on Thursday evening, bringing heavy rainfall to Tamil Nadu. 'Gaja' that lay over southwest and adjoining southeast and west central Bay of Bengal is about 550 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 up to 100 kmph, the Met office here said