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Thunderstorms and thunder observations

Thunderstorms and thunder observations. Sven-Erik Enno Estonia 10.08.2005. Different types of thunderwinds. Straight line winds Gustfronts Microbursts Tornadoes Mesocyclones. Structure of a thundercloud. Structure of a thundercloud. Structure of a thundercloud.

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Thunderstorms and thunder observations

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  1. Thunderstorms and thunder observations Sven-Erik Enno Estonia 10.08.2005

  2. Different types of thunderwinds • Straight line winds • Gustfronts • Microbursts • Tornadoes • Mesocyclones

  3. Structure of a thundercloud

  4. Structure of a thundercloud

  5. Structure of a thundercloud

  6. Damaging winds occurr if... • Air temperature and relative humidity values are high • There are multicell / supercell thunderstorms • Vertical windshear is strong enough • Storng convectiv airflows occur • Sharp temperature and air pressure contrasts under and around thunderclouds

  7. Vertical airflows inside thundercloud

  8. Microbursts / downbursts

  9. Air temperature and pressure contrasts

  10. Windsystem of a thundercloud

  11. Straight line winds formation

  12. Straight line winds between two thunderclouds

  13. Damaging straight line winds in Estonia 16.07.2001 Air pressure Air temperature Windspeed m/s Wind direction

  14. 16-th July 2001

  15. 16-th July 2001

  16. Storm path in Notheastern Estonia

  17. Supercell and mesocyclone

  18. Supercell in USA

  19. Supercell in USA

  20. Supercell in USA

  21. Supercells in Estonia

  22. Supercell in Estonia

  23. Thunder observations in Estonia • Few meteorological stations • Inserting lightning detectors • Detailed observations and information from different places: over-Estonian volunteer thunderstorm observers network

  24. Estonian thunderstorm observers network

  25. Interactive European lightning maps

  26. Interactive European lightning maps

  27. Contact information: Sven-Erik Enno seenno@ut.ee

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