Heavy to very heavy rainfall has been forecast across all divisions of Bangladesh, according to the Meteorological Department on Monday (15 September). Officials warned that monsoon activity over the country and the Bay of Bengal remains strong, raising the likelihood of widespread downpours.

Meteorologist Khandaker Hafizur Rahman said the low pressure over Telangana has weakened, but the monsoon trough is still active over Rajshahi, Rangpur, Mymensingh, Dhaka, Khulna, Barishal, Chattogram, and Sylhet.

Until Tuesday (16 September) morning, most areas are expected to see light to moderate rain or thundershowers, with heavy to very heavy rainfall likely in some regions. Day and night temperatures may slightly decrease.

From Wednesday (17 September), rainfall will be more concentrated in Rangpur, Mymensingh, and Sylhet, while other divisions may see scattered showers. Temperatures may rise slightly during this period.

The forecast for Thursday (18 September) and Friday (19 September) indicates continued rainfall across the country, with heavier downpours in the northern and northeastern regions. Temperatures are expected to remain steady or increase slightly.

The Bangladesh Meteorological Department has advised all seaports to hoist local cautionary signal No. 3 as squally weather is likely over the North Bay and coastal areas.

In a warning issued on Wednesday (3 September), meteorologist Dr. Md Omar Faruq said a low-pressure area over the northwest Bay of Bengal has intensified into a well-marked low. It is likely to move west-northwestward, causing significant pressure variations and squally winds over the region.

Authorities instructed Chattogram, Cox’s Bazar, Mongla, and Payra ports to keep signal No. 3 hoisted. Fishing boats and trawlers in the North Bay have been advised to remain close to the coast and proceed with caution until further notice.

The Bangladesh Meteorological Department has forecast rain and thunderstorms accompanied by gusty winds in seven districts on Wednesday (3 September). The forecast, issued for 9 am to 6 pm, said Khulna, Barishal, Patuakhali, Noakhali, Cumilla, Chattogram, and Cox’s Bazar may experience winds from the south or southeast at speeds of 45 to 60 kilometers per hour.

River ports in these regions have been advised to hoist cautionary signal No. 1.

In its latest 120-hour forecast, the Met office said Rangpur, Mymensingh, and Sylhet divisions are likely to see widespread showers, while parts of Rajshahi, Dhaka, Khulna, Barishal, and Chattogram divisions may also experience rain or thunderstorms. Moderate to heavy rainfall may occur in some areas, though day and night temperatures are expected to remain nearly unchanged.