Thunderstorms and thunder observations

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Thunderstorms and thunder observations

• Sven-Erik Enno
• Estonia
• 10.08.2005

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Different types of thunderwinds

• Straight line winds
• Gustfronts
• Microbursts
• Tornadoes
• Mesocyclones

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Structure of a thundercloud
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Structure of a thundercloud
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Structure of a thundercloud
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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

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Vertical airflows inside thundercloud
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Microbursts / downbursts
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Air temperature and pressure contrasts
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Windsystem of a thundercloud
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Straight line winds formation
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Straight line winds between two thunderclouds
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Damaging straight line winds in Estonia 16.07.2001
Air pressure
Air temperature
Windspeed m/s
Wind direction
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(No Transcript)
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16-th July 2001
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16-th July 2001
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Storm path in Notheastern Estonia
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Supercell and mesocyclone
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Supercell in USA
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Supercell in USA
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Supercell in USA
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Supercells in Estonia
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Supercell in Estonia
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Thunder observations in Estonia

• Few meteorological stations
• Inserting lightning detectors
• Detailed observations and information from
  different places over-Estonian volunteer
  thunderstorm observers network

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Estonian thunderstorm observers network
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Interactive European lightning maps
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Interactive European lightning maps
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Contact information

• Sven-Erik Enno
• seenno_at_ut.ee