Overview
- KNMI issued a code yellow warning that covers Zuid‑Holland, Noord‑Holland, Utrecht, Flevoland, Gelderland, Zeeland, Noord‑Brabant and Limburg, with the first warning window focused on Thursday night.
- Forecasters expect localized cells with thick hail around 2 cm, wind gusts up to about 75 km/h and heavy rain in short periods that can produce local wateroverlast and traffic disruption.
- The meteorological institute is testing a new app function that can send a location‑based alert up to 15 minutes before extreme local downpours, hail or damaging gusts, though widespread activations are not expected for the night window.
- Event organisers across the warned provinces are monitoring forecasts and have adjusted or cancelled some outdoor programming and prepared shelter plans to limit risk to attendees and staff.
- The unstable pattern is expected to persist into Friday afternoon and beyond, coastal cells may be energised by the warm North Sea and some places could see very high local totals of rain, reported as possibly reaching around 100 mm.