# Code yellow for dense fog until Friday 9:00

> The KNMI, the Dutch weather service, has issued a code yellow warning for dense fog that can cause problems for traffic.

News · published 2026-10-30 05:33 · https://nlnow.nl/a/code-yellow-for-dense-fog-until-friday-9-00/

The KNMI issued a code yellow warning for dense fog on Thursday evening. It remains in force until Friday morning at 9:00. Fog is possible in places, and visibility may drop below 200 metres.

The KNMI says the fog can be "very local and treacherous" and may cause problems for traffic. In the morning it may be persistent. The weather service advises drivers to slow down and keep a greater distance from other road users.

## Background

- **KNMI (Koninklijk Nederlands Meteorologisch Instituut)**: The Royal Netherlands Meteorological Institute is the Dutch national weather service, responsible for weather forecasts, climate data and seismic monitoring in the Netherlands. It issues official weather warnings using colour codes (yellow, orange and red) for conditions such as fog, storms, heavy rain, snow and extreme heat. These warnings are widely followed by the public, municipalities, emergency services and transport operators.

From NLnow, news from the Netherlands in English. How stories are made: https://nlnow.nl/about/