IMD weather forecast for October 20: Heavy rain, thunderstorms likely in Karnataka, Kerala and Andhra Pradesh

New Delhi: Heavy rainfall, thunderstorms, lightning and gusty winds are expected across several parts of India on Tuesday, October 20, 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 showers are also forecast for the Andaman and Nicobar Islands, Coastal Andhra Pradesh, Kerala and Mahe.

The weather department has also forecast thunderstorms and strong winds in several southern states over the coming days. Meanwhile, a well-marked low-pressure area over the southwest Arabian Sea is expected to move towards the coast of Somalia later this week.

Tamil Nadu, Puducherry weather forecast

Tamil Nadu, Puducherry and Karaikal are likely to receive heavy to very heavy rainfall at isolated places on October 20. Isolated to scattered showers are expected across the region between October 19 and 25, with heavy rainfall likely to continue during October 22-25.

Thunderstorms accompanied by lightning and gusty winds of 40-50 kmph, with gusts reaching up to 60 kmph, are also forecast at isolated places during this period.

According to the IMD, an upper-air cyclonic circulation over the southwest Bay of Bengal off the Tamil Nadu coast persists up to 5.8 km above mean sea level. An associated trough extending towards the northwest Bay of Bengal is also contributing to the prevailing weather conditions.

Kerala, Mahe and Lakshadweep weather forecast

Kerala and Mahe are likely to experience fairly widespread to widespread rainfall from October 19 to 25, with heavy showers expected at isolated places throughout the period.

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

Lakshadweep is also expected to receive widespread rainfall during the week. Isolated heavy rainfall is likely between October 22 and 25, while thunderstorms and gusty winds are forecast during October 19-23.

Andhra Pradesh weather forecast

Coastal Andhra Pradesh and Yanam are likely to receive isolated to scattered rainfall between October 19 and 25. Heavy rainfall is forecast at isolated places from October 19 to 21.

Thunderstorms accompanied by lightning and winds of 30-40 kmph, with gusts up to 50 kmph, are likely on October 19. Stronger gusty winds of 40-50 kmph, with gusts up to 60 kmph, are expected on October 20 and 21. Strong surface winds are also likely during this period.

Rayalaseema is expected to receive isolated to scattered rainfall between October 19 and 25.

Karnataka weather forecast

Coastal Karnataka is likely to experience isolated to scattered rainfall during October 19-22 and again on October 25. Fairly widespread to widespread rainfall is forecast for October 23 and 24, while thunderstorms accompanied by lightning are likely at isolated places between October 19 and 23.

North Interior Karnataka may receive isolated to scattered showers on October 19 and between October 22 and 24. Thunderstorms are likely on October 19, followed by gusty winds of 30-40 kmph, with gusts up to 50 kmph, during October 22-23.

South Interior Karnataka is likely to receive isolated to scattered rainfall on October 19-20 and October 25. Fairly widespread to widespread showers are forecast between October 21 and 24, with heavy rainfall possible at isolated places. Thunderstorms and gusty winds are also expected during the week.

Weather conditions in North and Central India

The IMD has reported a Western Disturbance persisting as a cyclonic circulation over Himachal Pradesh and adjoining Punjab. An associated trough is also present in the middle tropospheric levels.

Another upper-air cyclonic circulation persists over northwest Uttar Pradesh and adjoining areas, while a separate circulation remains over south Rajasthan and neighbouring regions. A trough extending from southwest Rajasthan towards the northeast Arabian Sea has also been observed.

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