The India Meteorological Department (IMD) has forecast heavy to very heavy rainfall over Sub-Himalayan West Bengal and Sikkim tomorrow.The weather agency said that heavy rainfall is likely in the Northeastern States, Bihar, Chhattisgarh, Coastal Andhra Pradesh, Kerala, Mahe, Saurashtra, Kutch, Tamil Nadu, Puducherry, Karaikal and Rajasthan during the next two to three days. IMD also predicted thunderstorms accompanied by lightning and gusty winds over Andaman and Nicobar islands, Karnataka, Jharkhand, Kerala and Odisha till tomorrow. Meanwhile, light to moderate rainfall is expected in the national capital tomorrow.