Weather
Monsoon rains forecast across Bangladesh as low forms over Bay of Bengal
Bangladesh is likely to experience widespread rainfall and thunderstorms over the next 24 hours due to the active monsoon system, according to the Meteorological Department. The forecast, signed by meteorologist Khandaker Hafizur Rahman, was issued on Tuesday (26 August).
The department reported that a low-pressure area has formed near the West Bengal–Odisha coast over the northwest Bay of Bengal. The monsoon trough stretches from Rajasthan, Uttar Pradesh, Madhya Pradesh, and Bihar, across Bangladesh’s southern region into Assam. The monsoon is currently active over Bangladesh and moderate over the north Bay.
Under these conditions, many parts of Rangpur, Mymensingh, and Sylhet divisions, along with some areas of Rajshahi, Dhaka, Khulna, Barishal, and Chattogram divisions, are likely to see rain or thundershowers accompanied by gusty winds. Moderate to heavy rainfall may occur in isolated places. However, no major changes in temperature are expected.
Meanwhile, the Flood Forecasting and Warning Centre (FFWC) reported that another low-pressure system may form over the northwest Bay of Bengal and adjoining areas within the next 24 hours. Water levels in the Manu and Dhalai rivers of Mymensingh division may rise and remain steady for two days, while the Khwai River is expected to remain stable over the next three days. Coastal rivers in Barishal, Khulna, and Chattogram divisions may experience higher-than-normal tides for the next three days.
Though no significant rainfall was recorded inside Bangladesh in the past 24 hours, heavy showers occurred upstream in India’s Mizoram (Aizawl 76 mm) and Tripura (Kailashahar 74 mm). Looking ahead, from 26 to 29 August, moderate to moderately heavy rainfall is expected in Sylhet, Chattogram, Barishal, and Khulna divisions of Bangladesh, as well as in Meghalaya, Assam, and Tripura states of India.
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 forecast a slight drop in temperature for Dhaka and surrounding areas. In its six-hour weather bulletin from 7 AM Sunday, the agency said the sky may remain partly cloudy to temporarily cloudy with chances of light rain.
Winds are expected to blow from the south and southeast at a speed of 8 to 12 kilometers per hour.
At 6 AM, Dhaka recorded a temperature of 29 degrees Celsius with humidity at 83 percent, according to the Met Office.
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.
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