On Wednesday morning, some weather stations in Germany reported visibility of around 50, in some cases over 70 km.
Intermediate high influence ensures widely only slightly cloudy skies and lots of sunshine on Wednesday. In addition, the low humidity affects visibility. While the water vapor is invisible, it deflects light in a way that reduces distance vision. However, the air molecules scatter the light equally in all directions, which means that the sky blue appears evenly strong in the sky on clear days with dry air, as is currently the case.
However, water and dust particles scatter a large part of the light forwards, i.e. in the direction in which the light is incident. Because of this effect, also known as forward scattering, the sky around the Sun is brightest on hazy days when there is a lot of water vapor in the atmosphere. The luminosity falls off rapidly with increasing distance from the sun and the horizon appears hazy, the colors of the distant mountains washed out.
At high air pressure, the air sinks from higher altitudes, where there is little water vapor due to the low temperature. As a result, the air close to the ground also becomes drier, increasing visibility. But even after a cold front has passed, cold polar air often reaches us, which is also drier than the previous air mass. Because of this, after a rain, which also washes away the dust particles, the colors in nature often appear strong and saturated, and distant objects stand out more clearly.