Cumulonimbus incus mamma 5.6.2013

Observed phenomena: Cumulonimbus incus mamma (cumulonimbus with anvil and mammatus clouds)
Date: 5.6.2013
Time: 20:40-22:15
Observing place: Turku, Finland
Observing method: Photography
Technical information about photographing equipment: Olympus μ 1030 SW

In the evening of 5th of July 2013, I observed a really magnificent cumulonimbus -cloud in Turku, Finland. The cloud looked like a mature thunderstorm -cloud, but it didn’t develop a storm of any kind. Instead, it started to collapse, and while dissipating, it produced some nice mammatus clouds! Althought the cloud didn’t put up any good thunderstorm -show as I had expected, it was nevertheless fun to watch!

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The first thunderstorm of summer 2013

Observed phenomena: Thunderstorm
Observed storm phenomena:

  • Intense lightning
  • Mammatus clouds
  • Shelf cloud ahead of the cumulonimbus
  • Intense rain

Date: 18./19.5.2013
Time: 21:50-01:00
Observing place: Orimattila, Finland
Observing method: Photography
Technical information about photographing equipment: Canon EOS 1100D, objective: Canon EF-S 18-55mm IS

The very first thunderstorm of summer 2013 happened during the Atmospheric Optics -meeting in the night between Saturday and Sunday. In the evening, Marja Wallin noticed, that it’s thundering and alarmed us! We went out to the observing platform to do some stormspotting! The storm started-up slowly, but the it got more intensive and it moved towards us! In this phase we observed also some mammatus clouds in the approaching cumulonimbus. Soon the night got very dark, and lightnings were flashing frequently! Ahead of the approaching cumulonimbus, we observed a shelf cloud. The shelf cloud approached slowly, but eventually it passed us, and the strong wind started to blow! Soon after that, it started raining heavily, and the storm was just above us! Then we observed many lightnings very near us, and some of them hit very close to us! After this, the storm receded, and then the thundering ended and it was just raining.

A cumulonimbus cloud with magnificent mammatus 26.6.2012

Observed phenomena: Mammatus clouds

Date: 26.6.2012
Time: 20:23-20:40
Observing place: Ulvila, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Canon EF-S 18-55mm IS

On 26th of June, I observed a really magnificent cumulonimbus cloud with some impressive mammatus! The beginning of this display was a humble one, but it developed into a really good show! The cloud was evolving quickly, and it was possible to see the mammatus to grow and change shape! You just don’t see clouds like this every day!

Picture 9. Cumulonimbus cloud with well-developed mammatus observed in 26th of June in Ulvila, Finland.
Cumulonimbus cloud with well-developed mammatus observed in 26th of June in Ulvila, Finland.