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A Coordinated Field Experiment on Severe Thunderstorm Observations and Regional Modeling over the SAARC Region

SAARC STORM A Coordinated Field Experiment on Severe Thunderstorm Observations and Regional Modeling over the SAARC Region SAARC Someshwar Das* SAARC Meteorological Research Centre, Dhaka, Bangladesh *Permanent Affiliation:

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A Coordinated Field Experiment on Severe Thunderstorm Observations and Regional Modeling over the SAARC Region

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  1. SAARC STORM A Coordinated Field Experiment on Severe Thunderstorm Observations and Regional Modeling over the SAARC Region SAARC Someshwar Das* SAARC Meteorological Research Centre, Dhaka, Bangladesh *Permanent Affiliation: National Centre for Medium Range Weather Forecasting, NOIDA-Delhi, India

  2. South Asian Association for Regional Cooperation (SAARC)SAARC Meteorological Research Centre (SMRC) Dhaka, Bangladesh SMRC

  3. OUTLINE Part - 1 SAARC • Introduction • Thunderstorm Climatology • STORM Programme • Summary of pilot experiments 2006, 2007 & 2009 • Coordinated Field Experiment over E & NE India, Bangladesh, Nepal & Bhutan Part - 2 • Weather Hazards & Their Mitigation in the SAARC countries

  4. Nor’wester/ Squall line of 3 May 2009 SAARC

  5. Nor’wester/ Squall line of 11 May 2009 SAARC Source: DWR Kolkata

  6. Thunderstorm Climatology

  7. Socio-Economic Impact of Severe Thunderstorm (Kal Baisaki) • Severity of NORWESTERS: next to Tropical Cyclones • Average frequency of occurrence: Kalbaisaki is 28 (±5) in pre-monsoon period Tropical Cyclones (2) (±1) • Hail Storms and Squall Winds: Loss of human life and animals; Extensive damage to standing crops and property • Highest lightning-associated casualty in the world. • Highest frequency of hail storms in the world. • Frequency of occurrence is second highest to that in the central regions of United States. • May lead to flash floods • Major aviation hazard; with several reported air plane accidents. • Most Tornadoes in the country are associated with Kal Baisaki

  8. Typical damages by a Severe Thunderstorm:22nd April 2003, Dhubri,Assam. • Number of affected Villages :6 • Population Affected : 4900 • No. of human lives lost : 35 • No. of persons with serious injuries : 150 • No. of persons with minor injuries : 1350 • No. of cattle head lost : 517 • No. of poultry lost : 1340 • No. of houses fully damaged : 1350 • No of houses partially damaged : 650 • Total estimated damage :Rs. 2.00 Crore *National Disaster Management Cell (MHA, Govt. of India)

  9. SAARC

  10. SAARC

  11. SAARC Monthly distribution of Hail storms in India Diurnal variation of Hail storms in India

  12. STORM Programme

  13. What is STORM Programme? SAARC A Comprehensive Observational and Modeling study on genesis, evolution and life cycle ofintense tropical convective Storms

  14. STORM-Objectives SAARC • To understand: genesis, development and propagation of severe thunderstorms • To enhance the knowledge: Dynamical and thermodynamical structure role of microphysical processes for intensification • To study behavior of atmospheric electrification during intensification process and interaction with cloud microphysical processes • Development of meso-scale prediction system with improved forecast skill

  15. Pilot Experiment, 2006

  16. Pilot Experiment (20N-27N, 86-90E), 2006 Scale Environment of STORM Synoptic Scale Environment and mesoscale; SAARC

  17. Guwahati SAARC Patna Murshidabad Asnsol Ranchi Kolkata Digha Bhubaneswar Outer and Inner Meso - Net Quadrangles

  18. Pilot Experiment, 2007

  19. Map depicting Outer and Inner Meso-Net Quadrangles SAARC North-Eastern Sector Eastern Sector

  20. SAARC List of installed locations of AWS in the NER as on 24th February 2007

  21. SAARC STORM Programme Phase-1: Nor’westers Participating countries: India, Bangladesh, Nepal & Bhutan

  22. Coordinated Joint Field Experiment Bangladesh: Surface obs: 35 Pilot Balloon: 10 RS/ RW : 3 DWR : 3 Bhutan: Surface (Class-1): 21 AWS : India Surface obs: 559 Pilot Balloon: 62 RS/ RW : 39 DWR : 5 Nepal Surface (Class-1): 27 AWS : 15 Moh Gua Pat Mol Dha Aga Ran Kol Khe Cox Pilot Field Experiment conducted during 1-31 May 2009

  23. ISRO (India) will provide 50 AWS 3 GPS Sondes 1 Doppler Radar SAARC To be installed 24 AWS & 1 GPS Sonde in Bangladesh 16 AWS, 1 GPS Sonde and 1 Doppler Radar in Nepal 10 AWS & 1 GPS Sonde in Bhutan To fill up the Data gap regions during the main Expts. The AWS will be fitted with Satellite telemetry systems

  24. SAARC STORM: ROAD MAP SAARC International Programme Committee (IPC) Phase-1:2009-2011 Nor’westers India, Bangladesh, Nepal, Bhutan Phase-2: 2011-2013 Deep, Moist & Dry Storms India, Pakistan, Afghanistan Phase-3: 2013-2015 Maritime & Continental Storms India, Sri Lanka, Maldives Seven Working Groups Field Experiment & Implementation Weather Advisory & Program Management Capacity Building & Coordination Database Management Cloud Microphysics & Atmospheric Electricity Mesoscale Data Assimilation & Modeling Observational Analysis & Parameterization of Physical Processes

  25. Part – 2 SAARC Weather Hazards & Their Mitigation: Focus of South Asian Countries

  26. Weather Hazards & Their Mitigation in the SAARC countries ** SAARC Disaster Management Centre, New Delhi, India

  27. Weather Hazards & Their Mitigation in the SAARC countries ** SAARC Disaster Management Centre, New Delhi, India

  28. Thank You

  29. Radar Network Bhuj D D D D (C or X) Kochi S-Band: 2-4 GHz (7-15 cm) C-Band: 4-8 GHz (4-7 cm) X-Band: 8-16 GHz (2-4 cm) D: Doppler Radar (S band; 2.8 GHz)

  30. BMD (Dhaka) RADAR Specifications • Used BMD S-band radar, wavelength: ~10 cm • Coverage 600 km by 600 km • Grids points 240 x 240 • Grids Resolution 2.5 km x 2.5 km, only PPI scan • Dhaka radar collects reflectivity data and automatically converted into rain status and stored in six categories: status 1, status 2, status 3, status 4, status 5, status 6

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