The KNMI warns of local dense fog in the northern half of our country. That is why code yellow applies in Drenthe, among others. Dense fog may form in more places during the night, so that visibility is less than two hundred meters in some places.
In addition to our province, the warning for dense fog also applies to North Holland, Flevoland, Friesland, Groningen and Overijssel. Because fog banks can suddenly appear, road users are advised to pay extra attention.