Thunderstorms and thunder observations Sven-Erik Enno Estonia 10.08.2005.

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Thunderstorms and thunder observations Sven-Erik Enno Estonia 10.08.2005

description

Structure of a thundercloud

Transcript of Thunderstorms and thunder observations Sven-Erik Enno Estonia 10.08.2005.

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

Thunderstorms and thunder observations

Sven-Erik EnnoEstonia

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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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 [email protected]