Hi to all,

I'm a general aviation pilot and I would like to rely on Windy data during my flights. However, after initial enthusism about the broad variety of weather parameters that windy indicates and predicts I am disappointed that the data is surprisingly inaccurate at times. For example, right now the weather here in Zurich is foggy, the Metar of Zurich airport nearby reads:

LSZH 122120Z 29004KT 0450 R14/1000U R16/0800U R28/0750D R34/0350N FG VV002 05/05 Q1022 BECMG 0200 VV001

which clearly proves that there's fog all around and runway visibility is reduced to 750 m for certain runways which is confirmed by a look out of the window, I hardly see the buildings on the other side of the street! However, the cloud base in Zurich displayed in Windy is "unlimited" showing no clouds at all and all models indicate a ridiculous visibility of 47.6 km at present time! How come?