Bangladesh Meteorological Department on Saturday said that a low is likely to form in central Bay over the next two days.
It said that there might be an increase in rainfall in the country under the influence of the low late this week.
‘We are likely to see an increase in rainfall at the end of the week,’ said meteorologist Abdul Mannan.
Last year monsoon withdrew from Bangladesh on October 22.
But this year monsoon is likely to be extended beyond the third week of October, said Mannan.
He said that low pressures keep forming in the bay under the influence of La Nina, a weather condition in which warm surface waters in the Pacific Ocean are driven westwards by strong wind.
The surface temperature in the Bay of Bengal is recorded up to 26° Celsius, which is above the normal average of around 25° C.
‘It means a great deal when a 0.5° C change is recorded in ocean surface temperature,’ said Mannan.
He said that moisturerich air continued to feed low pressures in the Bay of Bengal.
In August, an unusual number of five low pressures were formed in the Bay while two in September and one so far in October, according to Bangladesh Meteorological Department.
Mannan said that the people may need to wait till December for the arrival of the winter this year.
Warm sea water means more cloud above and more rain.
Bangladesh has already experienced four major waves of flooding since late June as rivers struggled to drain a continued supply of upstream water.
Rivers in the country are still flowing high and more rain may sustain their swelled condition.
Vast floodplains, that are cultivated when exposed, are still under water, affecting livelihoods of many farmers.
Bangladesh Meteorological Department said that a trough of low lies over the North Bay.
India Meteorological Department said that the low pressure likely to form over the central Bay by Monday would intensify further causing rain in parts of India.
The IMD has already warned that this year winter might be colder than usual because of the La Nina conditions.
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