Schweizer Sturmforum

• Das Ding schrammt relativ knapp an der Grenze zur CH. Je nach Timing passiert gar nix. Man will sich halt doch nicht in die Nesseln setzen.
• Es ist nicht der Berg an Feuchtigkeit (Effective Precipitable Water) über der (Nord-)Ostschweiz

A level 2 was issued for SE Germany and W Austria for large hail, excessive rain and severe wind gusts.

....Germany, Austria, Switzerland, N Italy, Czech Republic....

A pronounced front bisects Germany with cool and modified marine air to its west and warm/moist air to its east. This front moves leisurely to the east and becomes quasi-stationary during the overnight hours over W Poland. Most likely daytime initiation (around noon) is forecast over the N-Alps to SE-Bavaria. During the afternoon hours, storms also emerge along the convergence zone along the German/Austrian border to the Czech Republic. CAPE/shear overlap ( 1500-2000 J/kg MLCAPE and 15-20 m/s DLS) favors well organized multicells/supercells with large hail. An isolated very large hail event is possible. Strong to isolated severe wind gusts accompany strongest storms, especially from NE Bavaria to the Czech Republic, where 0-3 km shear exceeds 15 m/s. PWs in excess of 30 mm enhance the risk of excessive rainfall and LL convergence zones in W Austria overlapping with high CAPE values, suggest critical areas for large hail.
In North Italy some multicells producing large hail and excessive rain are forecast during the evening hours where high MLCAPE values (>1000J/kg) overlap with strong DLS (20 - 25m/s), enhanced by LL moisture coming from the Gulf of Genoa and steep lapse rates by the diurnal heating. Enhanced LL CAPE and some offshore convection might cause a few waterspout reports mainly over the N-Adriatic Sea. Morning convection in the northern part of the 50-% lightning area (between Venice and Trieste and south to Pula) may see the best environment for waterspout activity