"imd"

The drizzle and low temperature combination made people reach out for their sweaters and jackets quite early in the day

Average maximum temperature recorded at Begumpet on Thursday was 25.7 degrees Celsius, five degrees below normal

Chennai and its suburbs received heavy overnight rains, with low-lying areas getting inundated and water entering houses in such localities.

IMD tweeted: "Deep depression has intensified into a cyclonic storm -- NIVAR over south-west Bay of Bengal (Cyclone alert for Tamil Nadu and Puducherry coasts - Yellow Message)."

The sudden change in weather is attributed to a deep depression over the south west Bay of Bengal, which has moved west-northwestwards and intensified into the cyclonic storm ‘Nivar’.

IMD also predicted isolated heavy rainfall over Kerala and Mahe on November 1 and November 1 and over South Interior Karnataka on November 2.

World Meteorological Department (WMO) has entrusted India with the responsibility of the Regional Centre of South Asia Flash Flood Guidance System for coordination, development and its implementation

This is the third low pressure area that developed in the Bay of Bengal in October and second to intensify into a depression.

As per the IMD's impact-based weather forecast for Hyderabad, there could be water pooling on roads and in low-lying areas in many places of the city

IMD has warned of flooding and water-logging in many parts of low-lying areas in several districts

The IMD has achieved significant improvement in track, landfall, intensity and adverse weather including heavy rainfall, strong wind and storm surge forecast.