KNMI issues local fog warning for first time
Yellow code was in force on Saturday evening in parts of Utrecht, South Holland, North Brabant and Gelderland, among others.
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On Saturday, KNMI issued a local warning for dense fog for the first time. The warning did not apply to an entire province, but to a defined area in the central Netherlands.
According to KNMI, dense fog occurred locally in central and southern parts of the Netherlands on Saturday evening. The warning was issued at 5.16pm and remained in force until midnight.
RTV Utrecht reported that yellow code was in force in Vijfheerenlanden, Lopik, IJsselstein, Nieuwegein, Houten and Wijk bij Duurstede, among other places. Parts of South Holland, North Brabant and Gelderland also fell within the warning area.
The local scale is new. From the beginning of November, KNMI switched from warnings issued by province to warnings based on smaller areas. This means a warning can apply to part of a province, while not applying elsewhere in the same province.
Dense fog can severely restrict visibility and therefore particularly disrupt traffic. RTV Utrecht advised road users to reduce their speed, keep sufficient distance and adjust their lighting. The precise traffic situation varies by road and moment.
KNMI distinguishes between the meteorological observation and the warning. Fog is the phenomenon; yellow code is an assessment that the phenomenon could have consequences in a particular location. The warning therefore does not mean that visibility was equally poor everywhere within the area.
For residents, the change is mainly practical: a warning can now apply to their own surroundings without covering the entire province. The first local warning says nothing in itself about a trend in fog or climate; it concerns a change in how hazardous weather is reported.
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The date, area and new regional approach were checked against KNMI and RTV Utrecht. The text clearly distinguishes between the weather phenomenon and the warning.
- confirmed On 7 November 2026, KNMI issued a local warning for dense fog. — The KNMI warning page records the warning and the time it was issued. source
- confirmed The warning applied, among other places, to parts of Utrecht, South Holland, North Brabant and Gelderland. — RTV Utrecht names the municipalities and parts of the provinces involved. source
- confirmed Since the beginning of November, KNMI has issued warnings on a smaller regional scale. — RTV Utrecht links the first local warning to the new approach. source
Editor's note
The warning and its regional nature were confirmed by KNMI and RTV Utrecht. The traffic consequences are described in general terms; no specific accidents have been linked to this warning.Sources
More on this in Dutch media
- NRC — „mist knmi”
- NOS — „mist knmi”
- Het Parool — „mist knmi”