In recent years, northern India has experienced significant shifts in weather patterns due to changes in the jet stream and the behavior of western disturbances—a crucial system of winds that bring snow and rainfall during the winter months.

Western disturbances which are traditionally occurring between December and March are now becoming more frequent in summer months (May to July). This extended season overlaps with the onset of the summer monsoon, leading to intensified rainfall and increased flood risks in northern India.

The convergence of moisture-laden western disturbances, originating from regions like the Mediterranean, with the Indian Ocean-driven summer monsoon system results in more intense and concentrated rainfall events. This interaction significantly raises the potential for flash floods and riverine flooding across the region.

The timing and intensity of snow and ice melt associated with western disturbances play a critical role in water availability for agriculture, hydropower generation, and human consumption in the Indus-Ganges river system. Changes in these patterns directly affect water security in northern India.

Also, these climate change-induced alterations in the subtropical jet stream, which steers western disturbances, pose challenges for accurate weather forecasting. This is particularly concerning given the heightened risks of extreme events such as flash floods and cloudbursts. Enhanced disaster preparedness and early warning systems are essential to mitigate these risks and improve community resilience.
These findings underscore the urgent need for improved forecasting capabilities and adaptive measures to address the complex interplay between climate change, jet stream dynamics, and extreme weather events in northern India.