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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Image of an exceptional thunder cloud - 14.8.2021 at 18.15 - 14.8.2021 at 18.34 Jämsä Observation number 100554

Visibility IV / V


A really big thundercloud alone in the sky, rumbling. In the second picture, the cloud 20 min later and the rumble paused. I didn't see lightning.



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