A low-pressure area is forming over the Bay of Bengal. The IMD says it could strengthen into a cyclonic storm and later become a severe cyclonic storm.
If it strengthens, the storm will be called Montha, a name from Thailand meaning “beautiful flowers.” The IMD issued an orange alert for Chennai, Tiruvallur, and Ranipet. These districts may face very heavy rainfall on October 27.
IMD Forecast
The IMD predicts the system will become a depression by October 26. It could intensify into a cyclonic storm by October 27.
The depression over the southeast Bay of Bengal moved west at 7 kmph in six hours. At 11:30 am, it was 460 km west-southwest of Port Blair and 950 km east-southeast of Chennai.
The system will likely move west-northwest. It may become a deep depression by October 26 and a cyclonic storm by October 27 morning.
The IMD added, “It will move northwest, then north-northwest, and become a severe cyclonic storm by October 28 morning.”
Expected Landfall
The storm may hit the Andhra Pradesh coast near Kakinada between Machilipatnam and Kalingapatnam on October 28 evening or night.
It could bring winds of 90-100 kmph, with gusts up to 110 kmph.
IMD Warnings
On October 28, the IMD issued an orange alert for 10 Odisha districts: Kendrapara, Jagatsinghpur, Puri, Khurda, Cuttack, Ganjam, Gajapati, Rayagada, Koraput, and Malkangiri.
The remaining 20 districts received a yellow warning.
On October 29, six districts—Jagatsinghpur, Kendrapara, Jajpur, Bhadrak, Balasore, and Mayurbhanj—remain under orange alert. Ten others remain on yellow alert.
Impact on Tamil Nadu
Tamil Nadu will receive widespread rain over the next few days. Several districts may face heavy showers. Chennai and nearby areas may get light to moderate rain with isolated thunderstorms on October 26.
IMD Weather Alert:
— India Meteorological Department (@Indiametdept) October 25, 2025
Heavy to very heavy rainfall is likely over several southern and eastern states in the coming days.
States affected: Tamil Nadu, Kerala, Coastal Karnataka, Andhra Pradesh, Rayalaseema, Odisha, Saurashtra & Chhattisgarh.
Dates: Oct 26–30, 2025
🌧️ Extremely… pic.twitter.com/pA06u8Pvrs
Impact on South Karnataka
Bengaluru may see moderate to heavy rain and strong gusty winds due to a twin weather system. The IMD forecasts rain until October 26 and issued a yellow alert.