A level 1 is issued for the Czech Republic, Austria and N Italy for excessive convective precipitation, large hail and to a lesser degree for severe convective wind gusts.
Further south in the Czech Republic, Austria and N Italy, CAPE is a little lower (around 1000 J/kg, regionally up to 2000 J/kg) and cold-air advection largely compensates positive vorticity advection ahead of the trough, leaving little lift support beyond the cold front itself and the orography. At least scattered afternoon and evening storms are foreseen, but the hail and wind risk is lower than in Poland and conditional upon surface-based convection, which may be confined to mountainous areas, whereas storms moving NE-ward into N Austria and the Czech Republic could all to soon become undercut by the cold front and decouple from the surface.
South of the Alps, a strong cap and the lack of synoptic lift become an increasing issue. It appears therefore unlikely that the storms from the Austrian and Italian Alps will propagate into lower terrain, despite still plentiful CAPE.
Gewitter in Salzburg Stadt
