The interaction of the downslope winds and fog formation over the Zagreb area

The possible influences of the Sava River and urban heat island (UHI) on fog were relatively small. The largest river effect is most likely at stations that are located northeast of the river. The UHI can contribute to the formation of katabatic winds under clear-sky conditions in the afternoon/early evening. Still during temperature inversion conditions with fog, the UHI can affect the magnitude of the temperature inversion by reducing it.