Content
Slippery roads: No or minor danger, level 1
Kontextspalte
Danger level 1 (No or minor danger)
Danger level 2 (Moderate danger)
Danger level 3 (Considerable danger)
Danger level 4 (High danger)
Danger level 5 (Very high danger)
No danger level
Danger level 1 (No or minor danger)
No evaluation
Danger level 2 (Moderate danger)
- Impact: Local or widespread risk of skidding
- Recommended action: keep an eye on local weather developments and stay informed; always follow the official advice.
- Packed snow: less than 4 cm, road temperature of < 0 degrees
- Black ice: wet roads that have frozen over
- Icy roads: freezing rain
Danger level 3 (Considerable danger)
- Impact:
- Sudden, acute danger of skidding
- Icy roads to the extent of being impassable
- Disruption to air travel
- Branches breaking and falling as a result of their ice load
- Recommended action: keep an eye on local weather developments and stay informed; always follow the official advice.
- Freezing rain: up to 2 mm
Danger level 4 (High danger)
- Impact:
- Sudden, acute danger of skidding;
- Road and air travel brought to a standstill;
- Disruption to rail travel;
- Falling branches or trees as a result of their ice load;
- Interruption of electricity supply and/or telephone network, particularly in regions that are not easily accessible.
- Recommended action: keep an eye on local weather developments and stay informed; always follow the official advice.
- Freezing rain: over 2 mm (total precipitation volume freezing on the ground)
Danger level 5 (Very high danger)
It is not possible to make a distinction for larger deposits of precipitation. Widespread ice formation on roads over a sustained period is a rare occurrence in Switzerland.
No danger level
No evaluation
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Last modification: 24.06.2019
