A low-pressure area may form over the North Andaman Sea within 24 hours and could intensify, bringing scattered rain to all divisions including Rajshahi.
The Bangladesh Meteorological Department has forecast that a low-pressure area may form over the North Andaman Sea and adjoining areas within the next 24 hours, with the potential to intensify in the coming days. According to the latest weather bulletin issued on September 19, 2026, the system could bring changes to weather patterns across the country.
The weather forecast indicates that light to moderate rain or thundershowers accompanied by temporarily gusty winds may occur at some places in the Chattogram Division and at one or two places in the Rangpur, Rajshahi, Mymensingh, Dhaka, Khulna, Barishal, and Sylhet divisions. The monsoon axis currently extends from Rajasthan, Uttar Pradesh, Bihar, and West Bengal through central Bangladesh to Assam, with one extension reaching the North Bay of Bengal.
Meteorology experts tracking the system suggest it may intensify gradually and move west-northwestward over the following three to four days. While no cyclone warning has been issued at this stage, the India Meteorological Department indicates the low-pressure system could strengthen into a depression around September 21-22. If the system develops into a cyclonic storm, it would be named Arnab, a name contributed by Bangladesh to the regional naming list.
Daytime temperatures may rise slightly across the country, while nighttime temperatures are expected to remain nearly unchanged. The monsoon is currently less active over Bangladesh and remains weak over the North Bay of Bengal. No warnings have been issued for inland river ports or maritime areas as of Saturday morning.