Weather tomorrow: IMD forecasts heavy rain, thunderstorms in 8 states; Tamil Nadu on yellow alert, winds up to 60 kmph likely. Heavy rainfall, thunderstorms, and lightning are forecasted in several southern states from October 23 onward. Keralam and Karnataka are expected to experience widespread rainfall during this period. Delhi-NCR and parts of northwest India may also see rainfall on October 24 and 25. A yellow alert has been issued for Tamil Nadu districts due to.