Stau cloudiness forms if a flow of sufficiently moist air is forced to rise over a mountain barrier. This process generally results in prolonged precipitation.

Parameter	Description
Precipitation	Active front: intensification of precipitation within the Stau Separate stau clouds: long lasting, high precipitation activity, mostly rain or drizzle, convective showers embedded if a strong uplift is provided
Temperature	Cold stable shallow air mass on the windward side of the mountains, warm dry on the lee side.
Wind (incl. gusts)	Weakening within the Stau region, strong winds on the lee side
Other relevant information	Low and multilayered clouds in the Stau area, high clouds or cloud free at the leeward side Icing from high amount of super-cooled water within the Stau cloudiness