Skywarn Austria Forum

For the Alps and surrounding areas .... Moderate BL moisture is present along and ahead of this boundary with some enhancement during the day (evapotranspiration and convergence along the front). With SW-erly mid-level cross Alpine flow (although not strong), a diabatically and dynamically driven lowering of surface pressure over SE-Germany and the S-Czech Republic is forecast with enhanced confluence/increasing BL moisture north of the Alps. With somewhat steeper mid-level lapse rates aloft, widespread 800 - 1500 J/kg MLCAPE should evolve with expected diabatic heating. Potential hindering points were already discussed in the first paragraph and could locally influence the final CAPE build-up.
Both, surpassing of the convective temperature and a passing short wave from the SW spark numerous thunderstorms over Switzerland and W-Austria around noon with an increase in coverage thereafter. 15 m/s DLS support organized convection with large/isolated very large hail for maturing storms. In addition, flash flood producing rainfall amounts with slow moving/clustering storms pose an additional risk. Severe wind gusts may stay confined to local intense downdraft/downburst events.

... N-Italy to S-/E-Austria ...

The approaching short-wave from the W and a favorable CAPE/shear space (800-1500 J/kg and 15 m/s DLS) result in well organized multicells/isolated supercells, which evolve over N-/NE-Italy and far S-Austria. These storms pose a large/isolated very large hail, strong to isolated severe wind gust and excessive rainfall risk. In addition, isolated thunderstorms from the Ligurian Sea may spread onshore and to the NE. The strength of the short-wave indicates a risk of upscale growth into numerous clusters, which enter S-Austria during the afternoon hours. A continued risk of large hail, excessive rain and strong to isolated severe wind gusts exists. During the evening and night, this activity outruns strongest forcing and is forecast to weaken betimes as CAPE diminishes.

Bürgler87 hat geschrieben:Stimmt, Tps auch hier am Fallen. 14-16°C

Auslöse auf jeden Fall ident zu gestern. Werden wir bald sehen ob im Flachland was möglich ist

Bürgler87 hat geschrieben:Klingt gut
Ostwind bläst ganz gut, Tps 16-18.

Btw: ZAMG hat ganz OÖ aus der Gewittervorwarnung genommen. Schreit ja förmlich nach Deckelbrecher in den Zentralraum Dann is aber glaub ich die Hölle los.