Weather Update: New Low Pressure Area Developing Near Andaman - October 24, 2025
Good morning and welcome to today's crucial weather update.
Important Note: This post reflects our personal weather assessment based on current models. For official weather forecasts and information, please follow the announcements made by the Indian Meteorological Research Centre and government-affiliated sources.
Focus on Formation: A Low Pressure Area is Imminent
Today, October 24, 2025, attention is focused on the formation of a significant system in the Bay of Bengal.
The depression previously stabilized over the Arabian Sea has moved. Concurrently, a trough structure (known as "தாளி அமைப்பு" in Tamil) that had moved inland via interior Tamil Nadu and merged with the low-pressure area has now lifted. This system is currently an upper-air atmospheric circulation. This trough is now moving southeast of Sri Lanka, over the Bay of Bengal.
Crucially, this trough structure is anticipated to form a Low-Pressure Area (LPA) within the next 24 hours. Weather models predict that this LPA will then move in a west-northwesterly direction.
Currently, there is some uncertainty regarding the system's strengthening, as there are two circulations involved, and it is unclear which one will dominate. However, the determination of the genesis point is expected today, which will clarify the future path and intensification.
A Climatological Insight: It is important to remember that based on climatological patterns, during the month of October, major disturbances are less likely to affect Tamil Nadu. Systems during this period, usually until the first week of November, tend to move towards Southern Andhra Pradesh and Odisha. After the first week of November, there is a greater probability that subsequent systems will affect Tamil Nadu.
Rainfall Review: The Last 24 Hours
Several regions recorded impressive rainfall in the past 24 hours:
- Ranipet Arakkonam recorded 96.4 mm of rain.
- Thiruvallur Vyasapuram also registered 96.4 mm.
- Other significant totals include Thiruvallur Manavur (64.8 mm), Gummidipoondi (61.6 mm), Dharmapuri Namandahalli (58 mm), and Kanyakumari Nallamalai Mayilary (58 mm).
- Heavy rainfall (100 to 150 mm) was also recorded in many parts of the Rayalaseema districts of Andhra Pradesh.
- In Chennai, rainfall totals included Pallikaranai (50 mm), Avvai Nagar (47.2 mm), Kannagi Nagar (47 mm), and Neelankarai (44 mm).
Detailed 24-Hour Forecast
Rainfall is expected to be localized in Tamil Nadu today, similar to yesterday. However, widespread and heavy activity is expected elsewhere due to the proximity of the depression and strong westerly winds.
Kerala
Widespread moderate to heavy rain is expected across Kerala today.
- Heavy to Very Heavy Rain: Thiruvananthapuram, Kollam, Pathanamthitta, Idukki, Kottayam, and Alappuzha are likely to see moderate to heavy rain, and very heavy rain in some areas.
- Very Heavy Rain Likely: Malappuram, Kozhikode, Wayanad, and Kannur districts will see widespread heavy to very heavy rain. Widespread very heavy rain is also possible in Kasaragod district.
Karnataka, Goa, and Coastal Maharashtra
The coastal districts, including Karavali Karnataka, Kodagu, Dakshina Kannada, Udupi, Uttara Kannada, Goa, and the coastal districts of Maharashtra, could see moderate to heavy rain, with chances of very heavy rain.
- Heavy Rain Likely: Kalyana Karnataka (Gulbarga, Yadgir, Raichur, Bellary).
- Moderate/Heavy Rain: Bengaluru, Tumkur, Chikkaballapur, Kolar, and several other districts including Belgaum, Bidar, Haveri, and Chitradurga are expected to see widespread moderate rain, with heavy rain in isolated areas.
Andhra Pradesh and Telangana
Yesterday, some parts of Rayalaseema recorded 100 to 150 mm of rain. Today, moderate to heavy rain is forecast for many districts.
- Widespread Moderate to Heavy Rain: Chittoor, Tirupati, Nellore, Kavali, Prakasam, Guntur, and Palnadu.
- Widespread Heavy Rain: Kurnool, Anantapur, Vijayawada, West Godavari, and Krishna districts.
- Heavy rain is also highly likely in the northern districts: Vizianagaram, Visakhapatnam, Anakapalli, Kakinada, and Rajahmundri.
- Telangana: Widespread moderate rain is expected, with heavy rain possible in areas including Hyderabad. Specifically, heavy rain may occur in Hyderabad and surrounding areas like Sangareddy and Medak.
Tamil Nadu
Due to westerly winds, rain activity today will be limited, not widespread.
- Heavy Rain: Is likely specifically in the Nilgiris district.
- Moderate/Heavy Rain: Expected in Kanyakumari and Tirunelveli, particularly in areas bordering the Western Ghats (like Valparai and Sholayar).
- Widespread Moderate Rain: Expected in several central and northern districts, including Thanjavur, Cuddalore, Puducherry, Vellore, Dharmapuri, and others.
- Light/Moderate Rain: Forecast for western districts (Erode, Tiruppur, Coimbatore, Salem), and the Chennai, Thiruvallur, Kanchipuram, Chengalpattu, and Ranipet districts.
Stay Tuned!
We believe this update has provided clarity on the current weather situation. We will continue to track the development of this new system.
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