Thiruvananthapuram: The India Meteorological Department (IMD) has revised its rainfall forecast for Kerala, upgrading the existing Green alert (light to moderate rain) to a Yellow alert (heavy rain) in Thiruvananthapuram, Kollam and Pathanamthitta districts.

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According to the weather agency, isolated heavy rainfall is expected across these southern districts. Under IMD parameters, heavy rainfall refers to precipitation measuring between 64.5 mm and 115.5 mm within a 24-hour period.

 

Low-pressure area likely to intensify into depression

The IMD has also warned of a developing weather system over the Bay of Bengal. A cyclonic circulation currently persists over the South Andaman Sea and adjoining areas. Under its influence, a low-pressure area is likely to form over the Southeast Bay of Bengal around November 13.

The system is projected to move in a north-westerly direction and intensify into a Well-Marked Low-Pressure Area by November 14. It is expected to strengthen further into a Depression over the same region around November 15, the IMD stated.

 

Multiple cyclonic circulations driving wet spell

Alongside the Bay of Bengal system, two other atmospheric systems are actively influencing Kerala’s weather.

  • A cyclonic circulation is positioned over the Southeast Arabian Sea and the adjoining Lakshadweep region.
  • Another cyclonic circulation persists over the Gulf of Mannar and surrounding areas.

Driven by these combined systems, isolated places across Kerala are forecast to receive light, moderate, or heavy rainfall from November 12 to November 16.