Low Pressure Area Over Bengal Bay Triggers Heavy Rain Warning

A low-pressure system has formed over the North-West Bay of Bengal and the adjoining coastal areas of North Odisha and West Bengal. According to the Bangladesh Meteorological Department, the system’s trough extends across the southern region of Bangladesh all the way to the Indian state of Assam. This meteorological development is expected to trigger widespread moderate to heavy rainfall across various parts of the country.

The weather office released these findings in its twenty-four-hour bulletin on Wednesday evening. The department noted that the active monsoon remains moderately strong over mainland Bangladesh and highly active over the North Bay of Bengal, creating conditions ripe for persistent precipitation.

Distribution of Rainfall Across the Divisions

Under the influence of this low-pressure system, weather conditions are expected to deteriorate across several regions. Light to moderate rain, accompanied by temporary gusty winds and scattered thunder, is predicted for many areas within the Rangpur, Mymensingh, Barishal, Chittagong, and Sylhet divisions.

Meanwhile, parts of the Rajshahi, Dhaka, and Khulna divisions will also experience sporadic downpours. The Meteorological Department has issued a specific warning that isolated areas across the country could experience moderately heavy to very heavy falls during this period.

These localized heavy downpours pose a risk of temporary waterlogging in low-lying urban areas, particularly in major cities where drainage systems are easily overwhelmed. Maritime ports and fishing trawlers operating in the North Bay have been advised to exercise caution due to the choppy sea conditions generated by the active monsoon winds.

Recent Precipitation Records

Recent rainfall data indicates that wet weather has already begun to settle over the country. In the twenty-four hours leading up to Wednesday evening, the highest amount of rainfall was recorded in Sreemangal, situated in the tea-growing district of Moulvibazar, which received 51 millimetres of rain.

In contrast, the capital city of Dhaka experienced much lighter showers, recording just 7 millimetres of rainfall during the same period. However, with the monsoon currents gaining strength, precipitation levels in Dhaka and surrounding central districts are expected to rise in the coming days.

Local authorities in coastal districts have been urged to keep a close watch on the situation, as the combination of a low-pressure system and an active monsoon frequently leads to elevated tidal surges and localised flooding in vulnerable riverside communities.