Overview
- The KNMI issued a countrywide code yellow covering the midday to evening period on Monday, expanding an earlier coastal alert to the whole Netherlands.
- Forecasters warn storms can bring heavy short‑term rain, small hail and wind gusts around 60–70 km/h that can cause aquaplaning and local damage.
- Typical local rainfall is forecast at 20–30 mm with parts of Noord‑Holland at risk of 50–70 mm within 12–24 hours, raising risks of flooding in low‑lying spots.
- Models and observations show storms forming over warm coastal waters and moving inland, so coastal provinces and the Wadden Islands face the greatest early risk.
- Conditions should dry gradually Monday evening with a brief improvement Tuesday–Wednesday before renewed instability later in the week and a higher chance of a wetter autumn due to warm sea temperatures.