A deepening seasonal low-pressure system over southwestern Bangladesh and adjoining West Bengal has intensified into a well-marked low, prompting the Bangladesh Meteorological Department (BMD) to issue a forecast for heavy to very heavy rainfall across several regions over the next three days.
In an official bulletin signed by meteorologist Md Abul Kalam Mallik on Wednesday, BMD warned that, due to active monsoon conditions, heavy to very heavy rainfall is likely in parts of Chattogram, Barishal, Khulna, Rangpur, Mymensingh, Sylhet, Dhaka, and Rajshahi divisions within the next 72 hours.
The department also expressed concern over possible landslides in the country’s hilly districts—Chattogram, Rangamati, Khagrachari, Bandarban, and Cox’s Bazar—as well as temporary urban flooding in parts of Dhaka, Chattogram, and Khulna due to excessive rainfall.
According to the BMD’s extended forecast, the well-marked low is likely to move northwestward. Its extension currently reaches the northern Bay of Bengal. The monsoon trough stretches from Bihar, India, through the low-pressure center, across southern Bangladesh to Assam, and is actively influencing weather over Bangladesh and the adjoining sea.
Under these conditions, most areas in Rangpur, Rajshahi, Mymensingh, Dhaka, Khulna, Barishal, Chattogram, and Sylhet divisions can expect light to moderate rain or thundershowers with gusty winds within the next 24 hours. Isolated locations may experience moderately heavy to very heavy rainfall, which could persist through Sunday and potentially continue into the following week.
During this period, day and night temperatures are expected to drop slightly across the country.
In a separate advisory signed by meteorologist Afroza Sultana, the BMD issued cautionary signal no 1 for inland river ports, warning of possible squalls and heavy rainfall.
From 10am to 6pm today, parts of Dhaka, Faridpur, Jashore, Kushtia, Khulna, Barishal, Patuakhali, Noakhali, Cumilla, Chattogram, and Cox’s Bazar regions may experience rain or thundershowers accompanied by temporary gusts or squalls blowing from the south or southeast at 45km/h to 60 km/h.
Over the past 24 hours, Khulna recorded the highest rainfall at 111 millimeters, while Bandarban recorded the lowest temperature at 23.3°C. Meanwhile, Sylhet experienced the highest temperature at 35.8°C, making it the hottest region during the period.
The BMD continues to monitor the situation closely and urges citizens, especially in vulnerable regions, to stay alert and follow local advisories.