# KNMI issues first yellow warning for part of a province

> Dense fog in the south of Utrecht province and parts of three neighbouring provinces has triggered the first weather warning that does not cover a whole province.

News · published 2026-11-07 16:35 · https://nlnow.nl/a/knmi-issues-first-code-yellow-for-part-of-a-province/

The weather institute KNMI has issued a code yellow for dense fog in a narrowly defined area: the south of Utrecht province, the north of Noord-Brabant and small parts of Gelderland and Zuid-Holland. It is the first regional code yellow the KNMI has issued. Until 1 November, weather warnings were always issued per province.

The KNMI says the fog can cause dangerous situations and delays on the roads. The warning marks out exactly where the fog is expected to cause problems: in Wijk bij Duurstede, but not in Rhenen or Dordrecht.

Until 1 November, KNMI weather warnings were always issued per province. If it was slippery in the north of Noord-Holland, for example, the whole province got a code yellow, orange or red. In heavy rain or storms, four or five provinces were sometimes warned at once.

Since 1 November the institute has pinpointed more precisely where dangerous weather is expected. "That way you can see more exactly whether the dangerous weather is coming your way, and you can get ready," the KNMI said.

On the KNMI website and app, anyone can zoom in or search by place of residence. The data can also be downloaded for use in your own maps or applications.

The KNMI also warns of other kinds of dangerous weather, including slipperiness, heat, cold, thunderstorms, snow, heavy gusts of wind and heavy rain.

## Background

- **KNMI (Koninklijk Nederlands Meteorologisch Instituut)**: The Royal Netherlands Meteorological Institute is the Dutch national institute for weather, climate and seismic monitoring. It produces weather forecasts and issues the official weather warnings for the Netherlands, including the code yellow, orange and red levels.
- **code geel**: Code yellow is the lowest of the three warning levels that the KNMI issues for severe weather in the Netherlands, the others being code orange and code red. It signals weather that may cause some disruption, such as to traffic or outdoor activities, and asks people to be alert. A code yellow can cover the whole country, a full province, or a smaller area within a province.

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