Thiruvananthapuram: The Northeast monsoon hit Tamil Nadu and Kerala coasts on Saturday.
 Heavy (7- 11 cm in 24 hours) rainfall is very likely to occur at isolated places in Kerala, the India Meteorological Department  (IMD) said. Kerala is expected to witness thunderstorm with lightning accompanied by gusty winds speed reaching 30-40 Kmph at isolated places till October 25.

The Met department has issued a yellow alert in four districts on Saturday including Kollam, Pathanamthitta, Alappuzha and Idukki.  Yellow alerts have also been issued for the next four days.
A low pressure formation above the Bay of Bengal is also expected to bring rainfall to the state.

Cyclone Tej
A low-pressure area over the southeast and the adjoining southwest Arabian Sea will develop into cyclonic storm Tej on Saturday, the IMD said. This would be the second cyclonic storm in the Arabian Sea this year.

Cyclone Tej located above the Arabian Sea is unlikely to affect the weather in Kerala but the Indian National Centre for Ocean Information Services (INCOIS) has warned fishermen against venturing into the water due to rough seas.

The cyclonic storm is predicted to further intensify into a severe cyclonic storm on Sunday and move towards the south coasts of Oman and adjoining Yemen, according to the IMD.

However, meteorologists caution that at times, storms may deviate from the predicted track and intensity, as seen in the case of cyclone Biparjoy.