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Ursa Astronomical Association
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Ursa Astronomical Association

At least 5 lightning strikes seen - 7.6.2021 at 13.30 - 7.6.2021 at 18.00 Järvenpää Observation number 98738

Visibility III / V


Traditional sugar mousse day. The downside to storm bonga is that most of the hobby is when you follow rain radar, the sky, and the camera battery alternately for five hours and can’t go anywhere. On top of that, in the early afternoon, the deaf are plagued by drying drizzle stuffed with a plug, but in the evening, a decent anvil surprises and then there is a rush.

Something strange happened in the first images when the weakening deaf arrived towards him but surprisingly tense shapes began to form in its base structure. Apparently some kind of avalanche formation. "UFO-like structure" I did not notice any rotation, but the asperbalization continued.

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Additional information
  • Observed storm phenomena
    • Mammatus clouds info

      Mammatus- eli utarepilvet ovat utareen muotoa muistuttavia rakenteita. Tyypillisesti niitä nähdään ukkospilvien reunassa, mutta mammatukset voivat kulkeutua myös kauaksi ukkospilvistä. Lisäksi mammatuksia muodostuu muissakin kuin ukkospilvissä. 


      Mammatuksia ukkospilven takareunassa. Kuva Mirko Lahtinen.


      Mammatuksia ukkospilven takareunassa. Kuva Jari Luomanen.


      Mammatuspilveä. Kuva Mikko Peussa.


      Maaliskuisen kuuropilvijonon takareunan mammatuksia. Kuva Matias Takala.


      Tämä mammatusmuodostelma ei liittynyt ukkospilveen, vaan näkyi stratocumuluksessa. Kuva Jari Luomanen.

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