Valid: from 8.9. 20:40 to 8.9. 21:40
- Possible impacts: Breaking off of branches, toppling of individual trees. Lightning strikes. Landslides on steep slopes, sudden flash floods in streams, flooding. Hail damage.
- Recommendations for action: Avoid bodies of water, exposed areas (mountain ridges and peaks, trees, towers) and open terrain (e.g. clearings, fields) due to the risk of lightning strikes. In open terrain, if lightning strikes nearby, assume a crouched position (with your feet together) with as little of your body as possible touching the ground (do not lie down flat).
- Sudden occurrence of flood waves in brooks.
- Wind-thrown trees.
- On a local level, landslides from steep slopes are possible.
- Hail damage and lightning strikes.
- Failure of drainage and sewage systems.
- Subways, underground parkings and basement/cellar rooms might be flooded.
- Road, rail and air traffic obstructed.
- Ship traffic endangered due to sudden, very strong gusts of wind.