Heavy rainfall is forecasted to affect a range of regions across India on Wednesday, September 16, according to the India Meteorological Department (IMD). Isolated heavy rain is particularly expected in Delhi, Haryana, Chandigarh, Punjab, and various adjacent areas. This prediction comes as multiple weather systems are currently influencing the monsoon activity across northern, eastern, and southern parts of the country.

The IMD anticipates that Delhi and its neighbouring regions will experience another day of rain. The potential for thunderstorms, accompanied by lightning, has also been highlighted for isolated areas in Haryana, Chandigarh, Delhi, Punjab, and Uttarakhand. The rainfall may arrive in bursts, rather than as a continuous downpour throughout the day.

Forecasts indicate that widespread to fairly widespread rainfall will continue over Haryana, Chandigarh, Delhi, and Punjab from September 16 to 17, with isolated instances of heavy rain during this timeframe.

Heavy Rainfall Predicted for Eastern and Southern Regions

The IMD has indicated that rainfall will extend beyond northwest India. Isolated locations in the Andaman and Nicobar Islands, Arunachal Pradesh, Assam, Meghalaya, Kerala, Sub-Himalayan West Bengal, Tamil Nadu, Puducherry, and Karaikal are also expected to see heavy rain on September 16. Storm activity, accompanied by gusty winds reaching speeds of 40-50 kmph, is likely in some areas of the Andaman and Nicobar Islands, Kerala, Mahe, and Tamil Nadu.

Other areas in eastern and central India are likewise predicted to experience thunderstorms. Such conditions highlight the extensive reach of the current weather systems, suggesting that many regions will remain active for precipitation.

While thunderstorms are a significant concern, the IMD has stressed the need for caution due to the potential severity of these weather events, particularly concerning gusty winds and the accompanying rainfall.

Analysis of Current Weather Systems

The IMD has identified several concurrent weather systems contributing to the ongoing rain. On September 15, a low-pressure area that had been situated over southwest Rajasthan and adjacent Kutch moved into southeast Pakistan and surrounding regions. This system brought associated moisture and an upper-air circulation extending to about 7.6 km above mean sea level.

In addition, an upper-air circulation persists over the northwest Bay of Bengal and nearby coasts of Odisha and West Bengal. A trough linking south interior Karnataka to the Gulf of Mannar through Tamil Nadu is actively contributing to the moisture levels across various parts of the country.

According to the IMD, these dynamic weather elements are crucial in sustaining the monsoon activity, keeping rainfall consistent across several regions. They also suggest that conditions are becoming favourable for the southwest monsoon to begin retreating from some areas of west Rajasthan around September 19, although substantial rainfall is anticipated until that time.

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