The KNMI has issued the warning because visibility may be limited locally to less than 200 meters. Fog banks can be treacherous as the situation can vary greatly from place to place. They are expected to move up in the morning. This afternoon, code yellow applies again, this time for thunderstorms, a chance of hail, strong gusts of wind and a lot of precipitation. But according to the KNMI, this mainly happens in the southeast of the country.