India’s weather forecast for Tuesday, October 20, 2026, points to heavy rainfall, thunderstorms, lightning and gusty winds across several states and Union Territories, according to the India Meteorological Department (IMD). Tamil Nadu, Puducherry and Karaikal are likely to experience heavy to very heavy rainfall at isolated places, while heavy rain is also forecast over the Andaman and Nicobar Islands, Coastal Andhra Pradesh, and Kerala and Mahe. Several other areas may experience thunderstorms and strong winds. Meanwhile, a well-marked low-pressure area over the southwest Arabian Sea is expected to move towards the Somalia coast later this week.

Tamil Nadu, Puducherry weather forecast

Tamil Nadu, Puducherry and Karaikal are likely to experience heavy to very heavy rainfall at isolated places on October 20. Isolated to scattered rainfall is forecast across the region from October 19 to 25, with heavy rainfall also likely during October 22-25.

Thunderstorms accompanied by lightning and gusty winds reaching 40-50 kmph, with gusts up to 60 kmph, are likely at isolated places during October 19-25.

An upper-air cyclonic circulation over the southwest Bay of Bengal off the Tamil Nadu coast persists and extends up to 5.8 km above mean sea level. A trough extending from this circulation over the southwest Bay of Bengal and adjoining Tamil Nadu coast towards the northwest Bay of Bengal also persists.

Kerala and Mahe, Lakshadweep weather forecast

Kerala and Mahe are likely to receive fairly widespread to widespread rainfall from October 19 to 25. Heavy rainfall is forecast at isolated places throughout this period.

Thunderstorms accompanied by lightning and gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are likely during October 19-20. Stronger gusty winds reaching 40-50 kmph, with gusts up to 60 kmph, are forecast during October 21-23.

Lakshadweep is also likely to experience fairly widespread to widespread rainfall from October 19 to 25, with isolated heavy rainfall expected during October 22-25. Thunderstorms and gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are likely during October 19-20. Gusty winds reaching 40-50 kmph, with gusts up to 60 kmph, are forecast during October 21-23.

Andhra Pradesh weather forecast

Coastal Andhra Pradesh and Yanam are likely to receive isolated to scattered rainfall from October 19 to 25. Heavy rainfall is forecast at isolated places during October 19-21. Thunderstorms accompanied by lightning and gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are likely on October 19. Stronger gusty winds reaching 40-50 kmph, with gusts up to 60 kmph, are expected during October 20-21. Strong surface winds are also likely during October 19-21.

Rayalaseema is likely to receive isolated to scattered rainfall from October 19 to 25, with heavy rainfall at isolated places on October 21. Thunderstorms accompanied by lightning are likely on October 19, while thunderstorms with gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are forecast during October 20-23. Strong surface winds are also likely during October 19-23.

An upper-air cyclonic circulation persists over North Interior Karnataka and adjoining areas at 1.5 km above mean sea level. The IMD has also reported a trough extending from southwest Rajasthan to the northeast Arabian Sea, along with an upper-air cyclonic circulation over south Rajasthan and adjoining areas.

Telangana weather forecast

Telangana is likely to receive isolated to scattered rainfall during October 19-21. Thunderstorms accompanied by lightning and gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are likely during the same period.

Karnataka weather forecast

Coastal Karnataka is likely to receive isolated to scattered rainfall during October 19-22 and again on October 25. Fairly widespread to widespread rainfall is forecast during October 23-24. Thunderstorms accompanied by lightning are likely at isolated places during October 19-23.

North Interior Karnataka is likely to experience isolated to scattered rainfall on October 19 and during October 22-24. Thunderstorms accompanied by lightning are forecast on October 19, while gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are likely during October 22-23.

South Interior Karnataka is likely to receive isolated to scattered rainfall during October 19-20 and on October 25. Fairly widespread to widespread rainfall is forecast during October 21-24, with heavy rainfall likely at isolated places during the same period. Thunderstorms accompanied by lightning are likely during October 19-20, while gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are forecast during October 21-23.

Andaman and Nicobar Islands and Odisha weather forecast

The Andaman and Nicobar Islands are likely to experience isolated to scattered rainfall on October 19, followed by fairly widespread to widespread rainfall during October 20-25. Heavy rainfall is likely at isolated places on October 20 and during October 23-25. Thunderstorms accompanied by lightning and gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are forecast during October 19-20.

Odisha is likely to receive isolated to scattered rainfall during October 19-22. Thunderstorms accompanied by lightning and gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are likely at isolated places during October 19-20.

An upper-air cyclonic circulation persists over southeast Bangladesh and adjoining Tripura at 1.5 km above mean sea level. Another upper-air cyclonic circulation persists over the Gulf of Thailand and adjoining areas, extending up to 3.1 km above mean sea level.

West Bengal and Sikkim weather forecast

Sub-Himalayan West Bengal and Sikkim are likely to receive isolated to scattered rainfall on October 19. No significant weather is forecast over the wider region during the week.

Rajasthan, Uttar Pradesh, Himachal Pradesh and Punjab weather conditions

The IMD has reported a Western Disturbance persisting as a cyclonic circulation over Himachal Pradesh and adjoining Punjab at 3.1 km above mean sea level. An associated trough in the middle tropospheric levels extends along approximately 72°E, north of 32°N, at 5.8 km above mean sea level.

An upper-air cyclonic circulation also persists over northwest Uttar Pradesh and adjoining areas, extending up to 1.5 km above mean sea level. A separate circulation persists over south Rajasthan and adjoining areas at a similar height, while a trough extends from southwest Rajasthan to the northeast Arabian Sea.

Despite these atmospheric systems, the IMD has forecast no significant weather over Northwest, Central, East, West and Northeast India during the week, apart from the specific conditions outlined for individual states and regions.

Konkan and Goa, Maharashtra weather forecast

Thunderstorms accompanied by lightning and gusty winds reaching 40-50 kmph, with gusts up to 60 kmph, are likely at isolated places over Konkan and Goa on October 20.

Central Maharashtra is also likely to experience thunderstorms accompanied by lightning and gusty winds reaching 40-50 kmph, with gusts up to 60 kmph, at isolated places on October 20.

Madhya Pradesh weather forecast

Thunderstorms accompanied by lightning and gusty winds reaching 30-40 kmph, with gusts up to 50 kmph, are likely at isolated places over Madhya Pradesh on October 20.

Southwest Arabian Sea weather update

The well-marked low-pressure area over the southwest Arabian Sea remained nearly stationary during the 12 hours ending at 5.30 pm IST on October 19. Its associated cyclonic circulation extends up to 9.4 km above mean sea level.

The system is very likely to move west-northwestwards while maintaining its intensity as a well-marked low-pressure area until the evening of October 20. It is then expected to continue moving west-northwestwards as a low-pressure area until October 21, before turning west-southwestwards towards the Somalia coast on October 22.

Squally weather, with wind speeds of 40-50 kmph and gusts up to 60 kmph, is likely over the southwest Arabian Sea.