India’s monsoon season has been revitalised by a substantial onset of rainfall, reducing the seasonal rainfall deficit from 15 per cent to 12 per cent within a week. This improvement is primarily attributed to a series of low-pressure systems coupled with a Western Disturbance. These weather phenomena have resulted in widespread precipitation across northern, northeastern, central, and southern India.

According to the India Meteorological Department (IMD), the country registered 750.3 mm of rainfall from June 1 to September 28, while the average expected was 852.9 mm. The cumulative deficit now stands at 12 per cent. A week earlier, on September 21, the rainfall recorded was 697 mm as opposed to an anticipated 818.8 mm, reflecting a deficit of 15 per cent.

The timing of this rainfall coincides with the withdrawal phase of the southwest monsoon. The final bursts of rain in September have played a crucial role in closing the gap that resulted from insufficient rainfall during vital stages of the season.

Low-Pressure Systems Bring Much-Needed Showers

The recent weather patterns have been significantly influenced by several low-pressure systems forming over the Bay of Bengal. This, paired with the advancing Western Disturbance, has revitalised rainfall across a range of regions. The systems have generated moisture-laden winds, leading to generous amounts of rain, particularly benefiting areas that had been enduring extended dry spells.

This surge in rainfall is particularly beneficial for regions in central and northern India, where the monsoon’s irregular distribution had left several states with marked deficits. Moreover, the northeastern states also reported increased rainfall during this period, while southern India witnessed benefits from the movement of these weather systems and the moisture they carried.

Though the rainfall has improved the overall seasonal statistics for various states, the distribution remains uneven throughout the country. Some areas have experienced notable increases in rainfall, while others continue to face significant shortfalls.

Odisha Among Key Beneficiaries

Odisha has emerged as one of the notable beneficiaries of this recent rainfall, recording 1,476.8 mm of precipitation against its norm of 1,378.8 mm, which translates to an excess of 7 per cent by September 28. This marks an improvement from the previous week, where the state received 1,228.9 mm as opposed to 1,091.6 mm in average expected rainfall.

Despite this positive development in Odisha, numerous states still contend with seasonal deficits. Regions in the northwest, parts of peninsular India, and certain areas within the northeastern sector continue to report below-normal rainfall, which underscores the disparities in rainfall distribution across the country.

As the withdrawal of the southwest monsoon accelerates, the benefits of the final rainfall spell may prove critical for how much further the deficit can be reduced. The coming days are likely to reveal the extent of these improvements before the season concludes.

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