THIRUVANANTHAPURAM: The state is likely to get summer rain with thunderstorms till March 30. The northern districts of Kozhikode and Kannur are likely to receive heavy rainfall. The hilly and eastern parts of the southern districts receive showers in the evening and late at night. The central districts of Ernakulam and Thrissur districts are also likely to experience thundershowers. People should be vigilant as there is a possibility of winds and strong thunderstorms at speeds of 30 to 40 kmph in the central and northern districts on Saturday and Sunday.