Night of heat lightnings

Last night heat lightnings were observed all around Southern Finland! The lightnings were caused by a thunderstorm cells that were moving northwards from the Gulf of Finland to mainland. The lightning activity was pretty intensive, and I could observe several lightnings in a minute! I didn’t hear sound of thunder ever during the night, which means that the lightnings were pretty far away!

Heat lightning means a silent lightning flash, which is observed without the sound of thunder. Heat lightnings doesn’t have anything to do with heat, and term heat lightning is used because these lightnings are often observed when surface temperatures are warm. According to Accuweather, the name of the phenomena originates from an old wive’s tale, that a hot weather can generate lightnings without a thunderstorm, but this of course, is just a myth, as Accuweather explains.


3 thoughts on “Night of heat lightnings

  1. Alex Autin August 8, 2014 / 13:30

    Great images! I love watching heat lightning. I always thought the term ‘heat lightning’ was local, I had no idea it was used in places as far away as Finland.

  2. Juha Ojanperä August 8, 2014 / 15:13

    Thanks Alex! And actually the Finnish word for heat lightnings, elosalamat, refers to the local old folk’s belief, that heat lightnings help cereal to ripen! It’s interesting to learn, what kind of meanings people have for different words and phenomena in different parts of the world!

  3. Gustav Holmberg August 25, 2014 / 20:08

    I saw similar lightning here in Sweden, at about the same time, as well. Interesting!

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