In the region encompassing northwest Bay of Bengal, West Bengal, and nearby parts of Bangladesh, there persists a state of low pressure. The associated surface area reaches heights of up to 4.5 km above the average sea level, with the upwelling basin showing a southwest tilt. This low-pressure system is anticipated to shift in a north-northwest direction over the next 48 hours. Subsequently, a significant depression is predicted to form over the Ganga Basin in West Bengal and Bangladesh, followed by a west-northwest movement over Ganga Basin, West Bengal, Jharkhand, and surrounding vicinities within the subsequent 72 hours.
The monsoon trough has now elongated to 0.9 km above sea level, passing through the focal point of the low-pressure zone covering Phalodi, Banasthali, Shivpuri, Sidhi, Ranchi, and the areas adjacent to northwest Bay of Bengal in West Bengal and Bangladesh.
Moreover, a surface circulation that originated over the southeastern Arabian Sea and the nearby south Kerala coast has shifted towards the south interior of Karnataka and its neighboring regions, reaching heights of up to 5.8 km above sea level, with an southwest inclination. The trough stretching from Konkan to the southeastern Arabian Sea, extending from north interior Karnataka to the Comorin region and the south interior Karnataka, is now overlaid on the surface circulation in the surrounding zones, reaching altitudes of up to 1.5 km above the average sea level.
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