No evaluation

• 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

• 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

• 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)

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 evaluation