While in upper levels of troposphere, diffuse cold front was bringing strong westerlies in Slovenia, near surface was persisting advection of extremely hot air from Balkan peninsula (Bosnia and Herzegovina on Thursday +41,0°C, Mostar). Slovenian capital, Ljubljana, 61 mm of precipitation reported. CAPE parameter exceeded 2000 J/kg and unexpected extremely strong hailstorm in Vodice region, central Slovenia on Wednesday, early evening, could to start.
Anomalous storm line had developed over southern Austria, in mountainous region over Alps and then, extremely storm cell appeared above mountainous region of Slovenia. This type of georelief supported the evolution of storm and quickly appeared in Vodice region hails with diameter more than 10 cm.
Hailstorm was damaging roofs of houses (in some towns and villages are reported parts of settlements, with more than 50% damaged roofs) and demolished glasses on the cars.
It was the most extreme haistorm event in Europe in 2020. Slovenia has very good conditions for hailstorms such this, last year, in other region, occured a case with 14 cm hails according to Severe Weather Europe /here is all expert report: https://www.severe-weather.eu/recent-events/hailstorm-slovenia-july2020-mk/?fbclid=IwAR0h689rlEK8aE-j2XElWCBHCDSuHniirJ0WfmGlrjCoBtrjp7XcjeMu-wU.
