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

Ursa Astronomical Association

Hail in the summer season - 1.6.2023 at 16.36 A?hta?ri, A?hta?ri Zoo Observation number 116470

Visibility IV / V

Marko Myllyniemi, Lakeuden Ursa

My wife and I were on a tour in Ähtäri Animal Park, when a hailstorm surprised us at the end of the route - and even more so at the snow leopard... ;-D The hailstorm lasted for maybe 7-10 minutes, and in some places the ground was white with hail. The size of the largest grain I suddenly noticed was about five millimeters. The hailstones were pretty much snowflakes, there is no exact information about the temperature at the observation location at the time of observation, but a guess around +2°C- +3°C (around 4 pm when we left, the car gauge showed +3°C).

A good couple of hours earlier (i.e. at 1:19 p.m., temperature +2°C according to the car's gauge) when Alavuten left Tuuri towards Ähtäri, completely pure snow fell from the sky, but since Taivaanvahti does not collect observations from "snowy conditions in the summer season", let this somehow remain "historic " weather phenomenon for the bonus pictures ( #6 and #7) (at least I don't remember a single snowfall from June in my lifetime, even though there have been cold summers).



More similar observations
Additional information
  • How big was the largest hail?
    • 5 mm
  • Observed storm phenomena
    • Summer season hails info

      Rakeet ovat kesäkaudella satavaa jäätynyttä vettä.Raekuurot liittyvät voimakkaaseen konvektioon, usein samassa yhteydessä esiintyy myös ukkosta.

      Rakeet voidaan jakaa lumirakeisiin ja jäärakeisiin. Edelliset ovat styroksimaisia tai raejuustomaisia huurrepalleroita, jälkimmäiset ovat kirkkaita ja kovia kappaleita.

      Suomessa raekuurot ovat maltillisia, yksittäisten rakeiden ollessa tyypillisesti halkaisijaltaan muutaman millin. Joskus tosin Suomessakin voi taivaalta tippua halkaisijaltaan useita senttejä olevia rakeita.

       

      Raekuuro. Kuva Esa Palmi.

       

      Raekuuro. Kuva Mikko Peussa.

       

      Raekuuron valkaisenma tie. Kuva Matias Takala.

       

      Rakeita. Kuva Jaakko Kuivanen.

Technical information

Samsung Galaxy A52

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