These warnings apply primarily to the road conditions, whilst differentiating between the following hazards:
Widespread ice formation on roads over a sustained period is a rare occurrence in Switzerland.
| Possible impacts |
|
|---|---|
| Description of measurement and prognostic values | Freezing rain: over 2 mm (total precipitation volume freezing on the ground) |
| Possible impacts |
|
| Description of measurement and prognostic values | Freezing rain: up to 2 mm (total precipitation volume freezing on the ground) |
| Possible impacts | Risk of skidding |
| Description of measurement and prognostic values |
|
Recommendations during slippery roads
Warnings of slippery conditions are issued up to 800 m above sea level on the northern side of the Alps and up to 1600 m above sea level on the southern side of the Alps.