Convective Activity over a Central Indian Region from 2009 to 2013 by Using Radiosonde Data Shweta Thakur1*, Rahul Shrivastava1, Narendra Singh2 and S.K Jain1 1Department of Physics and Electronics, Barkatullah University, Bhopal - 462026 2Aryabhatta Research Institute of Observational Science (ARIES), Nainital - 263129 *Corresponding Author E-mail: shwetathakur76@yahoo.com Abstract Methodology The study of both radiosonde data and INSAT 3A satellite images is useful for better understanding of atmospheric thermodynamics. In this study, using radiosonde data of pre -monsoon seasons (April, May and June) for five years (2009 – 2013) , thermodynamic structure of convective atmosphere during pre-monsoon over a central Indian region - Bhopal (23.28oN and 77.35oE) and Gwalior (28.23oNand 78.25oE) has been obtained. The stability indices studied for the regions are showalter index (SI), Lifted Index (LI), Total totals index (TTI) and Thermodynamic parameter such as convective available potential energy (CAPE). INSAT-3A satellite images over a central Indian region are also used for study. There is convective activity over a central Indian region. In this study we have made a comparison of radiosonde data and INSAT-3A satellite thunderstorm convective activity on 29th April 2010 of Bhopal and Gwalior stations. Showalter index values range between - 4 and – 5, over this unstable region. LI has very low negative values in the range - 5 and - 6 over this unstable region. The value of K index ranges between 26 and 39, over a small convective potential. The TTI values rangebetween44 and 50. CAPE values range between 264 and 141 J/Kg .After evaluating various results we have come to the conclusion that over this marginally unstable region, thunderstorm can be generated at temperature 850 hPa. The source of data for thunderstorm, humidity and temperature is IMD Bhopal. This Study is done for the ten years period of 2001-2010. These dataset are station data, the stations taken for this piece of work are Bhopal (23.25o N and 77.42o E), Gwalior (26.15o N and 78.17o E), Guna (24.6o N and 77.3o E), Jabalpur (23.16o N and 79.9o E), and Sagar (23.8o N and 78.7o E). These stations are scattered over Madhya Pradesh-the central region of India Put some matter here Put all graphs here Introduction Results & Discussion Conclusions Observation were carried out from Bhopal (23.25o N and 77.42o E). Bhopal is situated almost in the centre of the country and it is far away from sea hence the weather system approaching Bhopal . Bhopal has a climate zone characterized by hot, humid summers and typically mild to cool and dry winter followed by the humid monsoon season. The winter starts with the middle of December and lasts till the end of February. Summer starts from late March and Continue till middle of June. The monsoon period remains from middle of June to middle of September. The Months April May and June are the transitional months from one season to other hence they are somewhat uncomfortable, otherwise the weather phenomena in each seasons has a gradual change and seldom goes to extreme level. Put some matter here Write Results here We have observed analysis 10 years data of main station of Madhya Pradesh that is Bhopal, Guna, Jabalpur, Gwalior, Sagar. Minimum no. of thunderstorm is come during in 10 years study 2001-2010 Guna as compare to other state because humidity is maximum 80% and Temperature is 400c. Guna is situated North-west direction in M.P. And in Bhopal is situated center of M.P, Gwalior is north direction of M.P, Jabalpur is situated East-South Direction of M.P and Sagar is North-East Direction. We have observed analysis 10 years data of main station of Madhya Pradesh that is Bhopal, Guna, Jabalpur, Gwalior, Sagar. Minimum no. of thunderstorm is come during in 10 years study 2001-2010 Guna as compare to other state because humidity is maximum 80% and Temperature is 400c. Guna is situated North-west direction in M.P. And in Bhopal is situated center of M.P, Gwalior is north direction of M.P, Jabalpur is situated East-South Direction of M.P and Sagar is North-East Direction. All Five Station have an approx Maximum & Minimum Temperature and Humidity also but Gwalior Station has less Temperature and humidity because that a research period less no. of thunderstorms is comes as compare to other station. Table 1(a) and 1(b) had shown the result of Thermodynamic parameters of Guna station of Year 2009 and 2013. Contact References Bluestein, H.B., 1993, “Synoptic-Dynamic meteorology in midlatitudes”, Oxford University Press.2, pp. 594. George, J.G., 1960. 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Wea. Rev, 110, pp. 504-520. Shweta Thakur Barkatullah University, Bhopal, M.P. Email: shwetathakur76@yahoo.com Phone: +91-8989912006