Weather update for tomorrow October 20, 2026: The IMD has forecast heavy to very heavy rainfall at isolated places over Tamil Nadu, Puducherry and Karaikal, with heavy rain likely over the Andaman and Nicobar Islands, Coastal Andhra Pradesh, and Kerala and Mahe. Thunderstorms, lightning and gusty winds are expected across several states, including Andhra Pradesh, Telangana, Karnataka, Madhya Pradesh, East Rajasthan, Odisha, Konkan and Goa, and Madhya Maharashtra. A well-marked low-pressure area over the southwest Arabian Sea is likely to move towards the Somalia coast by October 22.