Weather Forecast October 30: Cyclone Arnab Weakens, Heavy Rain Likely in Bihar, UP, Chhattisgarh and MP

Key Takeaways:

• The former very severe cyclonic storm has weakened into a depression over southern Chhattisgarh and adjoining southern Odisha and is expected to weaken further by October 29 evening.
• Moderate to heavy rain with isolated very heavy spells is possible over northern Chhattisgarh, northeastern Madhya Pradesh, eastern Uttar Pradesh and western Bihar.
• A low-pressure area over the south Andaman Sea may strengthen into a depression over the southeast Bay of Bengal and adjoining regions within the subsequent 48 hours.
• Rainfall is expected across several parts of eastern, central and northern India, while the Western Himalayas may also experience precipitation.
• Forecast Validity: Next 24 hours.

The Weather Systems Over the Country

The Deep Depression (remnant of Very Severe Cyclonic Storm “Arnab”) over north coastal Andhra Pradesh and adjoining areas of south Odisha, south Chhattisgarh and northeast Telangana moved nearly northwards at a speed of 22 kmph during the past 6 hours, weakened into a Depression, and lay centred at 0530 hrs IST today, October 29, over south Chhattisgarh and adjoining south Odisha near latitude 19.0°N and longitude 81.9°E, about 20 km west of Jagdalpur (Chhattisgarh), 170 km southwest of Bhawanipatna (Odisha), 210 km southwest of Titlagarh (Odisha), 250 km south of Raipur (Odisha), and 350 km southwest of Sambalpur (Odisha). It is very likely to continue moving nearly northwards and weaken into a well-marked low-pressure area around the evening of October 29, 2026.

Under the influence of yesterday’s upper-air cyclonic circulation over the south Andaman Sea and neighbourhood, a low-pressure area formed over the same region at 0530 hrs IST on October 29, 2026. The associated cyclonic circulation extends up to 7.6 km above mean sea level. It is very likely to move west-northwestwards and become a well-marked low-pressure area over the south Andaman Sea and adjoining Andaman & Nicobar Islands during the next 24 hours. Thereafter, continuing to move west-northwestwards, it is very likely to concentrate into a depression over the southeast Bay of Bengal and adjoining areas of the Andaman & Nicobar Islands and Andaman Sea during the subsequent 24 hours.

An upper-air cyclonic circulation lies over south Konkan and neighbourhood and extends up to 3.1 km above mean sea level.

The cyclonic circulation over Haryana and adjoining Uttar Pradesh persists and is seen at 0.9 km above mean sea level.

The Western Disturbance is now seen as a cyclonic circulation over north Pakistan and neighbourhood between 3.1 and 4.5 km above mean sea level, with the trough aloft in the middle and upper tropospheric westerlies having its axis at 5.8 km above mean sea level, roughly along longitude 66°E, to the north of latitude 22°N.

The other Western Disturbance, seen as a cyclonic circulation over Jammu and neighbourhood between 3.1 and 4.5 km above mean sea level, has merged with the above Western Disturbance.

Weather Activities During the Last 24 Hours

During the last 24 hours, heavy to very heavy rain occurred over coastal Andhra Pradesh and coastal Odisha.

Light to moderate rain with a few heavy spells occurred over interior parts of Andhra Pradesh and Odisha, parts of Jharkhand and Chhattisgarh.

Light to moderate rain occurred over West Bengal, parts of Northeast India, the Andaman and Nicobar Islands, East Madhya Pradesh and parts of Bihar.

Scattered rain and thunderstorms occurred over Uttar Pradesh, Delhi and NCR, Himachal Pradesh, Uttarakhand, Jammu and Kashmir, and in isolated pockets of Kerala, South Madhya Maharashtra, Punjab and Haryana.

Snowfall occurred over the higher reaches of Uttarakhand.

Maximum temperatures dropped significantly across Odisha, West Bengal, Andhra Pradesh, Chhattisgarh and East Madhya Pradesh.

Weather Forecast

During the next 24 hours, moderate to heavy rain with one or two very heavy spells is possible over north Chhattisgarh, Northeast Madhya Pradesh, East Uttar Pradesh and parts of West Bihar.

Moderate to heavy rain is possible over the Andaman and Nicobar Islands.

Light to moderate rain with a few heavy spells may occur over West Bengal, parts of north Odisha, Sikkim, Bhutan and eastern parts of Nepal.

Light to moderate rain is possible over Odisha, Chhattisgarh, eastern and central parts of Madhya Pradesh, Delhi, parts of Punjab, Haryana, East Rajasthan and the Western Himalayas.

Isolated light rain is possible over Telangana, Vidarbha, Madhya Maharashtra, Karnataka and Rayalaseema.

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Arnab Weakens Inland, but Rain Threat Persists Across Central India