Heavy Rains Alert: A Deep Dive into India's Weather on September 16, 2025

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It's September 16, 2025, and we're here to bring you the latest weather update from MAS Rainman Indian Weather. Before we dive into today's forecast, please remember that this is a personal weather estimate. Always refer to the official forecasts from the Indian Meteorological Department and government-approved sources for confirmed information. If you haven't already, subscribe to our channel "Rainman Studio - MAS Rainman இந்திய வானிலை" and enable notifications so you don't miss any genuine updates. Don't forget to like and share this video!

Key Weather Systems Influencing Today's Forecast

Several crucial weather systems are shaping today's precipitation patterns across India:

• Weakening Low-Pressure Area: The low-pressure system previously located in central India has weakened into a trough. This trough now extends from Uttar Pradesh all the way to Bihar.

• Persistent Upper Air Cyclonic Circulation: An upper air cyclonic circulation continues to linger near Andaman in the Bay of Bengal.

• Wind Convergence: Crucially, the convergence of winds between these two systems is leading to widespread heavy rainfall across South Indian regions today.

Regions to Brace for Heavy Rainfall Today (September 16, 2025)

Given the active weather systems, a broad swath of India is expected to experience significant rainfall:

• South India: Tamil Nadu, Kerala, Karnataka, Andhra Pradesh, and Telangana are all in for widespread heavy rain.

• Central and Northern Regions: Vidarbha, Madhya Pradesh, interior parts of Maharashtra, Uttar Pradesh, Bihar, West Bengal, and Odisha are also likely to receive heavy rainfall.

• Northeast India: Due to another cyclonic circulation, parts of the Northeast, including Assam, are also expected to see heavy rain.

The Next 7-10 Days: A New Monsoon Pulse for Tamil Nadu

Looking ahead, there's an interesting development in the Bay of Bengal:

• The system currently in the Andaman Sea is expected to gradually move towards central Andhra Pradesh over the next three to four days.

• As this system progresses, it will likely contribute to the formation of an East-West Shear Zone. This is also known as a new monsoon axis or ITCZ (Intertropical Convergence Zone), and meteorologists often refer to it as the Monsoon Intraseasonal Oscillation (MISO).

• This newly forming system is particularly significant as it is anticipated to bring widespread heavy rainfall to Tamil Nadu over the next week to 10 days. So, if your area misses out today, there's a good chance of rain arriving in the coming days.

State-Specific Forecasts for the Next 24 Hours

Here's a breakdown of what to expect in different states:

• Kerala: Widespread moderate to heavy rain is anticipated.

• Karnataka: Expect widespread heavy to very heavy rainfall in specific districts like Bidar, Kalaburagi (Gulbarga), Yadgir, Bengaluru, and Kolar. Other parts of Karnataka will likely experience widespread moderate to heavy rain.

• Andhra Pradesh: Widespread heavy rainfall is forecast across the state.

• Telangana: Widespread heavy rain, including in Hyderabad, is expected. Eastern districts like Mulugu, Warangal, Mahabubabad, and Kothagudem may see particularly severe rainfall.

Detailed Forecast for Tamil Nadu Today (September 16, 2025)

Tamil Nadu is set for varied rainfall patterns across its regions:

• South Tamil Nadu: Districts such as Virudhunagar, Tenkasi, Thoothukudi, Tirunelveli, Kanyakumari, and Ramanathapuram will experience widespread cloudy conditions with light to moderate rain. Virudhunagar, in particular, might see moderate to heavy rain in some areas.

• Central Tamil Nadu: Theni, Dindigul, Madurai, Sivaganga, and Pudukottai are expected to receive widespread heavy rain, with Madurai experiencing it again today.

• West and Central Interior Tamil Nadu: Nilgiris, Coimbatore, Erode, Dharmapuri, Salem, Namakkal, and Perambalur can expect widespread moderate to heavy rain accompanied by thunder.

• Delta Districts and Adjoining Areas: Cuddalore, Ariyalur, Mayiladuthurai, Nagapattinam, Karaikal, Thanjavur, and Tiruvarur are also forecast to have widespread moderate to heavy rain with thunder.

• North Interior Tamil Nadu: Districts including Krishnagiri, Tirupattur, Vellore, and Dharmapuri are likely to see moderate to heavy rain, with chances of severe rain in some pockets.

• Northern Coastal and Near-Coastal Districts: Following heavy rain last night and early this morning in Chennai and Tiruvallur, districts like Chennai, Tiruvallur, Ranipettai, Kancheepuram, Chengalpattu, Tiruvannamalai, Villupuram, and Puducherry are expected to receive moderate to heavy rain in some areas today.

• Overall Tamil Nadu: North interior districts have a higher probability of heavy rain today. Coastal districts might also receive heavy rain if systems move inland, but generally, moderate rain is expected.

• Daytime Temperatures: Expect daytime temperatures to continue ranging between 36 to 38 degrees Celsius.

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