Heavy rain, thunderstorms, and hailstorms are anticipated in various regions of India on Friday, October 30, due to the lingering effects of Cyclone Arnab. The India Meteorological Department (IMD) issued a forecast on Thursday, October 29, indicating that extremely heavy rainfall is expected in isolated areas of Bihar, while heavy to very heavy rain is likely in parts of Uttar Pradesh, West Bengal, Sikkim, and the Andaman and Nicobar Islands.

In northern India, unsettled weather conditions are predicted, with thunderstorms, hailstorms, and strong winds expected in several locations, including Delhi and the National Capital Region (NCR). The IMD’s warnings highlight the potential for significant weather disruptions across these areas.

Impact on Specific Regions

Bihar is forecasted to experience heavy to very heavy rainfall on Friday, with the possibility of extremely heavy rain in isolated places. The IMD also predicts heavy to very heavy rainfall in parts of East Uttar Pradesh and Sub-Himalayan West Bengal and Sikkim. Satellite imagery shows the weather systems affecting the Indian subcontinent, indicating a broad impact across these regions.

Additionally, Jharkhand and Uttarakhand may see heavy rainfall in isolated areas, while Odisha is likely to experience thunderstorms accompanied by lightning and gusty winds. The Andaman and Nicobar Islands are also expected to receive heavy to very heavy rainfall, with thunderstorms and squally winds anticipated in certain areas.

Hailstorms are forecasted for isolated locations in East Rajasthan, Haryana, Chandigarh, Delhi, Uttarakhand, and West Uttar Pradesh. Thunderstorms, along with gusty winds reaching speeds of 50-60 kmph, are also likely in isolated areas of Delhi, Haryana, and Chandigarh, further complicating travel and outdoor activities.

Cyclone Arnab’s Influence on Weather Patterns

The ongoing rainfall is partly attributed to the remnants of Cyclone Arnab, which made landfall on the Andhra Pradesh coast before weakening. According to the IMD, the resulting depression was situated over south Chhattisgarh and adjacent areas of south Odisha on Thursday morning. The system is moving northwards and is expected to diminish into a well-marked low-pressure area over north Chhattisgarh and neighbouring northwest Odisha by Thursday evening.

A low-pressure area is characterised by relatively low atmospheric pressure, encouraging air to converge and rise, which can lead to cloud formation and precipitation. The IMD has also identified another low-pressure area over the south Andaman Sea and surrounding regions, which is projected to move west-northwest and may develop into a depression over the southeast Bay of Bengal and adjacent areas in the coming days.

These weather systems are anticipated to sustain rainfall activity across parts of eastern and southern India into the first week of November. As conditions gradually evolve in other regions, the IMD continues to monitor the situation closely, providing updates as necessary to ensure public safety and preparedness.

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