Updated on June 28, 2015: During the last 2 to 3 days, heavy rain has been observed in most parts of Bangladesh. This rainfall was due to a low pressure area which initially formed over Northeast Bay of Bengal and travelled over Bangladesh. Now, this low pressure area has shifted towards Bihar, Jharkhand and adjoining West Bengal. Thus, rain activity has increased over these areas.
Now, the ongoing heavy rain will reduce but moderate showers will continue over many parts of Bangladesh. For the next 24 to 48 hours, the country will observe moderate showers. The intensity of the rainfall will further reduce as moist southerly winds from the Bay of Bengal will be replaced by westerly and south westerly winds resulting in reduced moisture and decreased rainfall.
Updated on June 27, 2015: Southwest Monsoon has been vigorous over Bangladesh and Gangetic West Bengal. The low pressure area over Bangladesh and adjoining West Bengal region has been bringing heavy Monsoon rainfall over coastal areas of Bangladesh. The system has also brought good amounts of rain over other parts of Bangladesh, Northeast India and Gangetic West Bengal.
At present, the western end of the Monsoon Trough is running very close to the foothills of Himalayas, while the eastern arm passes through Raxaul, Gaya and from the centre of the low pressure area over Bangladesh and adjoining Gangetic West Bengal.
Here’s a look at the rainfall figures in Bangladesh in a span of 24 hours from 8.30 am on Friday:
We can see that rainfall amounts tapered down as we move towards the interiors of Bangladesh. The low pressure area is still reorganising and rainfall will continue at least for next couple of days. Given the present conditions, heavy showers in the coming days could lead to inundation and flooding in Bangladesh.
Image credit - greenwatchbd.com