A level 1 was issued across Germany, Switzerland, Austria and Czech Republic mainly for heavy rainfall.
... Germany, Austria, Switzerland, Czech Republic ...
Scattered to widespread storms are forecast across this area in the parameter space of 500 - 1500 J/kg of MLCAPE and 0-6 km shear below 10 m/s. Mostly disorganised storms are forecast, in form of single cells or multicell clusters. Due to the mean wind below 5 m/s, low LCLs and high RH through low to mid-troposphere, heavy rainfall will be the primary threat with these storms. At this moment, it is not possible to identify a precise area with the highest threat of very heavy rainfall due to the of strong convergence signals in the NWP and the fact that the situation will likely depend on the evolution of overnight convection. Cloud debris from the overnight storms may limit the threat while the old outflow boundaries may serve as foci for new development.