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The meteorological department attributes these weather fluctuations to variations in westerly wind speed. According to their forecast, light to moderate rain with thundershowers can be expected in several areas across Tamil Nadu, Puducherry, and Karaikal on Wednesday. However, the department also anticipates heavy rainfall at one or two locations in the hilly regions of Coimbatore district, Nilgiris, Theni, Dindigul, and Madurai districts.