A deep depression over the Bay of Bengal crossed the coast near Nagapattinam on Saturday afternoon.
OPS said he was being "forced" to come up with such an announcement.
As the merger brought to an end weeks of suspense during which there was tough negotiations, the two factions said steps would be taken to expel party chief V K Sasikala.
A meeting presided over by Palaniswami said the appointment of Dinakaran as deputy general secretary was against party rules.
Three men, who survived the April 6 'encounter' in the Seshachalam forests, give crucial evidence to the National Human Rights Commission on how their friends and family members were wrongly detained and later shot dead.
Allotting seven seats to smaller allies, AIADMK general secretary Jayalalithaa on Monday released the list naming candidates for the rest of 227 seats for which she held interviews for ticket aspirants from across Tamil Nadu in the past two weeks.
Coming out clear on its intent to go it alone in Puducherry, the AIADMK released its candidates list for all the 30 constituencies for the May 16 assembly polls.
The twin announcements have virutally cleared the decks for the merger of the two factions.