Weather Forecast September 25: Deep Depression Moves Inland, Heavy Rain To Lash Central And East India; Monsoon Withdrawal Pauses

Key Takeaways:

• The deep depression crossed the north Andhra Pradesh coast near Kalingapatnam with sustained winds of 55–65 kmph, gusting to 75 kmph.
• Visakhapatnam recorded an extremely heavy 28 cm of rainfall, while Vijayawada-Gannavaram and Kakinada received 15 cm each.
• Heavy to very heavy rain with isolated extremely heavy spells is likely over Chhattisgarh, coastal Andhra Pradesh, Odisha and Telangana during the next 24 hours.
• The main rain belt will shift inland with the system, bringing heavy rainfall, thunderstorms and strong winds across parts of central and eastern India.
• Forecast Validity: Next 24 hours.

The Weather Systems Over The Country

The southwest monsoon withdrawal line passes through 32.5°N/72.5°E, Gurdaspur, Chandigarh, Muzaffarnagar, Aligarh, Dholpur, Udaipur, Deesa, Naliya and 23.0°N/67.8°E.

The deep depression crossed the north Andhra Pradesh coast, southwest of Kalingapatnam, between 11:00 PM IST on September 23 and 1:00 AM IST on September 24. At the time of landfall, maximum sustained winds were 55–65 kmph, gusting to 75 kmph.

At 5:30 AM IST on September 24, the deep depression was centred over north coastal Andhra Pradesh near 18.3°N and 83.7°E, around 50 km west of Kalingapatnam, 80 km north-northeast of Visakhapatnam and 170 km southwest of Gopalpur.

The system is likely to move northwestwards while maintaining deep-depression intensity for about 12 hours. Subsequently, it is expected to move north-northwestwards and weaken gradually during the following 24 hours.

A trough extends from the centre of the deep depression to the Gulf of Thailand across the central Bay of Bengal and north Andaman Sea, reaching up to 7.6 km above mean sea level.

A Western Disturbance persists as a middle-tropospheric trough, with its axis near 81°E to the north of 28°N at about 5.8 km above mean sea level.

An upper-air cyclonic circulation persists over northwest Uttar Pradesh and adjoining areas between 1.5 and 3.1 km above mean sea level.

Weather Activities During The Last 24 Hours

During the last 24 hours, rain or thundershowers occurred at most places over coastal Andhra Pradesh, Telangana, Chhattisgarh, Odisha, Jharkhand, Bihar, East Uttar Pradesh, West Bengal and Sikkim.

Rain occurred at many places over Jammu and Kashmir, Marathwada, North Interior Karnataka, Kerala, the Andaman and Nicobar Islands, Madhya Pradesh, Vidarbha, Konkan and Goa, and Rayalaseema.

Extremely heavy rain occurred at isolated places over coastal Andhra Pradesh. Significant rainfall amounts included:

• Visakhapatnam: 28 cm

• Another Visakhapatnam observatory: 20 cm

• Vijayawada-Gannavaram and Kakinada: 15 cm each

• Karwar and Long Island: 13 cm each

• Narsapur: 9 cm

• Machilipatnam: 9 cm

Light rain occurred over Gujarat, Tamil Nadu, Jammu and Kashmir, and Uttarakhand.

The highest maximum temperature reported on September 23 was 42.9°C at Jaisalmer in Rajasthan. The lowest minimum temperature over the plains was 17.1°C at Mandi in Himachal Pradesh.

Forecast

During the next 24 hours, heavy to very heavy rain, with isolated extremely heavy spells, is likely over Chhattisgarh, coastal Andhra Pradesh, Odisha and Telangana. The principal rain belt will shift inland with the deep depression, while exceptionally intense localized rainfall remains possible near and west-northwest of its track.

Heavy to very heavy rain may occur at isolated places over Bihar, Jharkhand, Vidarbha, Gangetic West Bengal, Sub-Himalayan West Bengal and Sikkim.

Isolated heavy rain is likely over East Madhya Pradesh, East Uttar Pradesh, Assam and Meghalaya, the Andaman and Nicobar Islands, Karnataka and Kerala.

Fairly widespread to widespread rain is expected over Chhattisgarh, Vidarbha, East Madhya Pradesh, Odisha, Jharkhand, Bihar, West Bengal, Telangana, coastal Andhra Pradesh, Kerala and Lakshadweep. Rainfall will remain comparatively limited over Gujarat and much of northwest India.

Thundersqualls with winds of 50–60 kmph may affect Chhattisgarh, coastal Andhra Pradesh, Odisha and Telangana. Thunderstorms with gusts of 40–50 kmph are possible over Bihar, Jharkhand, Gangetic West Bengal, Maharashtra, Konkan and Goa, Rayalaseema, and the Andaman and Nicobar Islands.

Strong surface winds are likely over Andhra Pradesh, Telangana, Madhya Maharashtra and Marathwada.

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