Ibadan — The recent downpour in Ibadan, Oyo State capital, which wreaked havoc across the city, was the highest in more than five decades, the International Institute of Tropical Agriculture (IITA) located in the Oyo State capital has said.
According to data recorded at the IITA, copies of which were made available to journalists yesterday, rainfall on that day hit an all-time high of 187.50 mm, accompanied by wind gusts reaching 65 kilometer/hour.
"The previous highest recorded rainfall was 178.30 mm in September 1987," the data revealed.
It recalled that the Friday, August 26, 2011 rains started at 16:40H and continued until 20:00H, with intermittent drizzling until 23:00H. Rainfall was most intense between 18:10H and19:20H when 75% of the rain fell.
The data noted that the more than six-hour rain led to flooding, toppled trees and damaged crops in many experimental plots in IITA.
It remarked that the extent of damage, although much at IITA and its neighboring communities was however, reduced as the IITA dam served as a buffer and a water 'collection reservoir' thereby reducing the amount of water flowing out to the creeks in neighboring communities.
The IITA data noted that elsewhere in Ibadan, the rainfall destroyed many lives and property, damaged key infrastructure such as bridges and roads, and pulled down electric poles.
According to IITA's weather data, the average daily rainfall in August 2010 was 8.9 mm considering all days, and 25mm considering only the rainy days. Maximum daily rainfall for August 2010 was 62 mm.
The data reeled out the 10 highest rainfall days in Ibadan as follow: 26 August 2011 (187.50mm); 21 September 1987 (178.30mm); 17 June 1955 (153.20mm); 20 April 1978 (147.50mm); 22 June 2001 (143.40mm); 28 August 1963 (130.00mm); 3 July 1985 (130.00mm); 7 June 2007 (126.20mm); 1 October 1994 (120.20mm); 20 October 2010 (118.00mm).