Bangladesh Met Office Issues 48-Hour Nor’wester Alert

The Bangladesh Meteorological Department (BMD) has officially issued a high-priority weather warning across the country, forecasting severe Nor’westers (locally known as Kalbaishakhi storms) over the next 48 hours. The alert was formally activated at 1:00 pm on Thursday, 30 April, following atmospheric observations indicating the formation of intense storm cells.

Forecast and Wind Velocity

According to the meteorological statement, the cautionary period remains in effect for two full days from its commencement. The department warns that squally winds, originating from the West or North-West, are expected to sweep across all eight administrative divisions of Bangladesh.

The projected wind speeds are estimated to range between 60 and 80 kilometres per hour (km/h). However, the BMD has noted that in certain localized areas, the velocity may exceed these figures, potentially resulting in significant gusts. These storms are typical of the pre-monsoon season in the Bengal Basin, often characterized by their sudden onset and high intensity.

Geographic Distribution

The warning encompasses the entirety of the national territory, specifically identifying the following divisions as areas of concern:

• Northern Region: Rangpur and Rajshahi

• Central Region: Dhaka and Mymensingh

• Southern Region: Khulna, Barishal, and Chattogram

• Eastern Region: Sylhet

Associated Atmospheric Phenomena

In addition to high-velocity winds, the alert highlights the significant risk of frequent lightning strikes. The meteorological conditions are also conducive to isolated hailstorms across various districts. The combination of lightning, hail, and high winds poses a multi-hazard scenario, which is a hallmark of the Kalbaishakhi season.

Summary of Weather Warning

Contextual Impact

Historically, storms of this magnitude in Bangladesh during late April lead to disruptions in inland water transport and potential damage to standing crops, particularly Boro rice, which is often nearing harvest during this period. The BMD advises residents to take necessary precautions against lightning and to seek shelter in sturdy structures during the passage of the storm cells.

While Nor’westers are a seasonal regularity, the department maintains that the current atmospheric instability necessitates heightened public awareness. Monitoring of satellite imagery and radar data continues as the system moves across the northern and western borders into the central heartlands of the country.