28.7.2011 Se pyörii sittenkin

Ajankohta Reitti Kesto Osallistujat
28.7.2011 klo 12-21

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7h / 278 km A-J Punkka
Ennuste kohdealueelle Merkittävimmät havainnot
MUCAPE ~1000 J/kg, 0-6 km shear alle 20 m/s, MIXR500m 10-13 g/kg. Pari vyörypilveän yritelmää, intensiivistä maasalamointia, erittäin rankkaa sadetta, levotonta pilvenpohjaa ja mahdollinen puuskarintamapyörre.

Säädata

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28.7.2011 klo 15 GFS-mallin ennuste. Ylärivi vasemmalla: Värein 500 metrin keskimääräinen vesihöyryn sekoitussuhde (g/kg).  Ylärivi oikealla: Värisävyin mean-layer CAPE(J/kg), punaisin viivoin 0-6 km tuuliväänne (m/s). Alarivi vasemmalla: 300 hPa lämpötila värein, tuulivektorit ja korkeus mustin viivoin. Alarivi oikealla: 850 hPa lämpötila värein, tuulivektorit ja korkeus mustin viivoin.

 

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Jokioisten luotaus 28.7.2011 klo 15.

 

Tarina

 Ei tällä kertaa tarkempaa tarinaa. Kuvat ja videot kertokoon olennaisen.

 

Valokuvat

 

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28.7.2011 klo 12.33 Hyvinkää

Ukkoskuuroalue lähestyy hitaasti etelästä edessään vaatimaton vyörypilvi.

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28.7.2011 klo 15.12 Hollola

Etelästä saapuneeseen ukkoskuuroalueeseen liittyy erillinen (länteen liikkuva) ukkoskuuro. Kohtaaminen saa taivaan kiehumaan.

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28.7.2011 klo 15.14 Hollola

Alueen itäreunaan kehittyy vyörypilvi, joka alkaa puskea vauhdilla itään.

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28.7.2011 klo 15.21 Hollola

Positiivinen maasalama parin kilometrin etäisyydellä. Vyörypilven perässä liikkuu stratus-riekaleita todella nopealla vauhdilla merkkinä heikosta(?) syöksyvirtauksesta (kuvan vasemmassa alalaidassa).

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 28.7.2011 klo 19.34 Porvoo

Viron voimakkaat ukkoset lähettävät Suomenlahden yli ulosvirtauksen, joka laukaisee uuden lyhytikäiseksi jääneen ukkoskuuroaallon etelärannikolla. Alueen etuosassa on hetken nähtävillä varsin näyttävä vyörypilvi.

Videot

28.7.2011 Vyörypilvi saapuu Hyvinkäälle etelästä (25-kertainen nopeutus, 18Mb)

28.7.2011 Vinhaa pyörimistä alapilvissä Hollolassa. Kyseessä mahdollisesti puuskarintamapyörre (5-kertainen nopeutus, 29 Mb)


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