alexa Impacts of Rainstorms during Austral Winter in Sao Paul
ISSN: 2167-0587

Journal of Geography & Natural Disasters
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Research Article

Impacts of Rainstorms during Austral Winter in Sao Paulo State, Brazil: A Case Study

Franchito SH1*, Gan MA1, Rao VB1, Santo CME1, Conforte JC1and Pinto O2

1Centro de Previsão de Tempo e Estudos Climáticos, CPTEC, Brazil

2Grupo de Eletricidade Atmosférica, ELAT Instituto Nacional de Pesquisas Espaciais, INPE C.P. 515, 12245-970, São José dos Campos, SP, Brazil

*Corresponding Author:
Franchito SH
Centro de Previsão de Tempo e Estudos Climáticos
CPTEC, Brazil
Tel: +55 12 3186-8400
E-mail: [email protected]

Received Date: February 06, 2016; Accepted Date: February 29, 2016; Published Date: March 02, 2016

Citation:Franchito SH, Gan MA, Rao VB, Santo CME, Conforte JC, et al. (2016) Impacts of Rainstorms during Austral Winter in Sao Paulo State, Brazil: A Case Study. J Geogr Nat Disast 6:162. doi:10.4172/2167-0587.1000162

Copyright: © 2016 Franchito SH, et al.This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

September 2015 was an atypical austral winter rainy month. Rainstorms were observed in Sao Paulo State, Brazil (53oW-44oW; 20oS-25oS) with catastrophic consequences. In this paper the atmospheric conditions responsible for the rainstorms that occurred on 8th September 2015 in Sao Paulo State and their social and economic consequences were analyzed. The results showed that the rainstorms affected practically the entire Sao Paulo State causing floods and threw down trees, interrupting of the traffic on the streets and affecting the system of electric energy. Rainstorms accompanied by high winds and strong divergence at 200 hPa and ascending motion were observed due to intense squall line moving over Sao Paulo State. Satellite and radar images showed strong convective activity and the heavier rainfall (around 90 mm) in the center-east sector at 20:45 UTC. Hourly data from meteorological stations showed that the wind gust and the precipitation were higher than 65 km h-1 and 10 mm, respectively in almost the entire State. In Sao Paulo city, the rainfall was the highest for September in the last 20 years. The amount of precipitation was 3% higher than the amount expected for the entire September. Since each region of inundation in Sao Paulo city causes a daily damage higher than US$ 263,000,00 a great economic harm must be expected. A co-operative project between National Institute for Space Research (INPE) institution and Energisa Power Company is in progress aimed to mitigate the effects of adverse weather conditions as in the case of the rainstorm that occurred in 8th September 2015.

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