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

Ursa Astronomical Association

Arcus cloud - 18.7.2017 at 22.37 Ilmajoki Observation number 65312

Visibility III / V

Marko Myllyniemi, Lakeuden Ursa

As I was racking bushes in the backyard, I noticed an avalanche approaching from the west (I had heard the roar a couple of times before), so I picked up my cell phone from the living room side as a recording tool.

The avalanche approached fairly quickly and was on for about nine minutes from the time the first image (and the beginning of the observation) was taken. When the last picture was taken, water started to sprinkle and the wind intensified somewhat, but not quite to the usual readings of thunderstorms (the pole is probably the right expression).

During the approach of the avalanche, from a distance, there were still a couple of thunderstorms, but all in all, they stayed, including those previously heard, including four of these wounds.

Figures 2 and 4 are panoramic images (the former of three images and the second of five images).



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