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Wednesday, July 29, 2009

[ALOCHONA] Dhaka sets single-day rainfall record in 53 years



Dhaka sets single-day rainfall record in 53 years
Shakhawat Hossain

Courtesy New Age 29/7/09

 

Dhaka experienced 333 mm shower in last 24 hours between Monday 7:00am and Tuesday 7:00am setting a record of single-day highest rainfall in 53 years, weathermen said.
   The torrential downpour after an unusually long spell of dry monsoon eclipsed the previous high of 326mm rain recorded in the capital city on July 13, 1956, said assistant meteorologist of Dhaka met office Rashiduzzaman.
   Until the rainy Monday night, Dhaka experienced only 293 mm rain in 27 days of July. Low rainfall throughout Ashar and half of Shraban pushed the mercury up, hot and humid temperature made life uncomfortable in the capital city as elsewhere in the country.
   Delayed monsoon has already hit the aus paddy hard and disrupted plantation of aman, the second largest rice crop, prompting the government to offer free electricity for irrigation.
   The main part of the record breaking rainfall continued marathon for eight hours from 1:00 am to 7:00 am Tuesday, when total 290 mm rain was recorded, added Rashiduzzaman.
   The 8-hour continuous rain that submerged most parts of Dhaka, however, could not shatter the country’s single-day highest rainfall of 425 mm which the port city Chittagong experienced on June 11, 2007.
   Compared to downpour in Dhaka, rainfall in other five divisional cities of the country in the last 24 hours was lower and did not cross 100mm, although most of the regions saw their biggest rainfall in this monsoon on Monday.
   Met offices recorded 90mm in Chittagong, 1mm in Rajshahi, 64mm in Barisal, 43mm in Khulna and 79mm in Sylhet during the period.
   The main reason for Dhaka division having so much rain was the ‘cloud burst’ caused by combined influence of delayed arrival of monsoon and a low over the Bay of Bengal, said weather forecasters.
   The met office forecast massive rainfall in most parts of the county in the next 48 hours before the monsoon overcomes its long dry spell.
    Monsoon starts from June and runs up to September, but this year’s monsoon was unusually delayed and until July 13, met offices recorded 44 per cent less rain compared to the same period of last year.

 



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