Bright noctilucent clouds in the sky of Turku 19./20.7.2013

Observed phenomena: Noctilucent clouds
Observed NLC forms:

I (Veil)
IIb (Bands with sharply defined edges)
IIIa (Waves, short, straight and narrow streaks)
IVb: Simple curve(s) with angular radius of 3 – 5 degrees

Brightness of the NLCs: 4 (very bright and attracting the attention of casual observers)

Date: 19./20.7.2013
Time: 00:50-02:15
Observing place: Turku, Finland
Observing method: Photography
Technical information about photographing equipment: Canon EOS 1100D, Canon EF-S 18-55mm IS, Samyang 8mm fish eye

A bright display of noctilucent clouds was observed in the sky of Turku, Finland in the night between 19th and 20th of July, 2013. I was observing the display in the Luolavuori -hill, which is situated few kilometres south from Turku downtown. From the hill, the horizon is totally open to every direction!

On that night, there were two detached NLC areas in the northern sector of the sky. The NLC’s covered the northern half of the sky from west to east, ant the maximum altitude of the NLC’s was about 40°. Especially the NLC area located in the northeastern-eastern sky was very bright. The dominating NLC forms were veil (I), sharp bands (IIb) and short and straight waves (IIIa). These late-July NLC displays are usually very nice to observe, because the background sky is already getting darker, and the NLC’s stand out very clearly from the sky!

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Bright display of noctilucent clouds 8./9.7.2013

Observed phenomena: Noctilucent clouds
Observed NLC forms:

  • I (Veil)
  • IIa (Bands with diffuse, blurred edges)
  • IIb (Bands with sharply defined edges)
  • IIIa (Waves, short, straight and narrow streaks)
  • IIIb (Wave-like structure with undulations)
  • IVa: Whirls with small angular radius (0.1 – 0.5 degrees)
  • IVb: Simple curve(s) with angular radius of 3 – 5 degrees
  • O (Unusual forms)

Brightness of the NLCs: 4 (very bright and attracting the attention of casual observers)

Date: 8./9.7.2013
Time: 01:30-02:20
Observing place: Turku, Finland
Observing method: Photography
Technical information about photographing equipment: Canon EOS 1100D, Canon EF-S 18-55mm IS, Samyang 8mm fish eye

I observed a bright display of noctilucent clouds in the night between 8th and 9th of July 2013. This display was clearly the brightest so far this summer! This display was very dynamic and it was evolving rapidly. The NLC’s covered a large area of the sky and they were concentrated on the northern sector of the sky. Only the southern sector of the sky was clear of noctilucent clouds, because the shadow of the Earth was limiting the visibility of the NLC’s. The dominant NLC forms in this display were veil (I) and sharply defined belts (IIb), but also many other forms were present. This NLC display was observed also in many other places in Europe, for example in Denmark.

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!

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.

Nacreous clouds observed on Christmas eve 2012

Observed phenomenae:

  • Nacreous clouds (type I)
  •  Crepescular rays

Date: 24.12.2012
Time: 16:25
Observing place: Ulvila, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Canon EF-S 18-55mm

Nacreous clouds of type I were observed during many days around mid-winter all over Finland. I was also once able to observe this phenomena! It happened in the evening of the Christmas eve in Ulvila, Finland. There was a gap in the otherwise continuous layer of low clouds, and the nacreus clouds were visible from this gap! The nacreous clouds were coloured orange by the setting Sun. I also observed some crepescular rays on the smooth veil of the nacreous clouds.

Nacreous clouds of type I coloured orange by the setting Sun and some crepescular rays.
Nacreous clouds of type I coloured orange by the setting Sun and some crepescular rays.

Bright noctilucent clouds 2./3.8.2012

Observed phenomena: Noctilucent clouds
Observed NLC forms:

  • I (Veil)
  • IIb (Bands with sharply defined edged)
  • O (Unusual forms)

Brightness of the NLCs: 4 (very bright and attracting the attention of casual observers)

Date: 2./3.8.2012
Time: 01:30-02:20
Observing place: Kuru, Ylöjärvi, Finland
Observing method: Photography
Technical information about photographing equipment: Canon EOS 1100D, Canon EF-S 18-55mm IS

This night I went to my observing place in the village of Länsi-Aure in Kuru, Finland. There I noticed really bright noctilucent clouds in the northern sky! This NLC display was dominated by bright, filamented (O) veil (I), but there was also some long, sharply defined bands (IIb). The NLC’s of this display were really bright, and they were actually brightest that I have observed during this season so far! Some high- and middle clouds interfered observing a little. Besides these NLC’s I observed also a lunar halo phenomena with 22° halo and paraselene (moon dogs).

Noctilucent clouds 27./28.7.2012

Observed phenomena: Noctilucent clouds
Observed NLC forms:

  • I (Veil)
  • IIIa (Waves, short, straight and narrow streaks)
  • IIIb (Wave-like structure with undulations)
  • O (Unusual forms)

Brightness of the NLCs: 3 (clearly visible, standing out sharply against the twilight sky)

Date: 27./28.7.2012
Time: 01:30-03:30
Observing place: Perniö, Salo, Finland
Observing method: Photography
Technical information about photographing equipment: Camera Canon EOS 1100D, lens Canon EF-S 18-55mm IS, Samyang 8mm fish eye

The NLC display of the second night of Cygnus 2013 -convention. This time I noticed the NLC’s @ 01:30 and observed them until 03:30. In the middle of the NLC observing, I observed also variable stars. Tonights display was pretty much similar than last nights. During early night, the NLC’s were at low altitude in the northern sky, but they rose higher later. The colour of the NLC’s was clearly pale blue.

This display was clearly veil (I)+wave (III) -type display. In the early evening, the display was consisted of veil (I) and waves (IIIa and b). The waves were transforming into undefined, turbulent-looking form (O). Later the NLC’s rose higher in the sky towards zenith. In this phase, veil (I) and turbulent forms (O) dominated the display, and only couple of small wave -sets were visible.