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Current wind hazards

Updated on: 29.06.2016, 21:39

Current wind hazards in Switzerland

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Wind: 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)
  • Effects:
    • Surface turbulence hinders light aircraft from flying;
    • Waves higher than usual on lakes;
    • Toppling of objects inadequately secured or free-standing objects;
    • Breaking of smaller branches
  • Behaviour:
    • Keep an eye on local weather developments
    • Stay away from forests
    • Secure any free-standing objects
    • Always follow the official advice
  • Description of measurement and prognostic values:Stormy winds in low and medium-altitude areas (incl. Foehn winds): 70-90 km/h
Danger level 3 (Considerable danger)
  • Effects:
    • Falling branches and individual trees;
    • Damage to individual roofs;
    • Lightly anchored objects with larger surface areas, such as tents and scaffolding, can be blown over;
    • Some disruption to road, rail, water and air traffic;
    • Possible shutdown of ski lifts and cable cars.
  • Behaviour:
    • Keep an eye on local weather developments
    • Stay away from forests
    • Secure any free-standing objects
    • Always follow the official advice
  • Description of measurement and prognostic values:
    • Top wind speeds in low to medium-altitude areas (incl. Foehn winds): 90-110 km/h
    • Top wind speeds in higher-altitude areas (>1800 m above sea level): 130-160 km/h
Danger level 4 (High danger)
  • Effects:
    • Falling trees;
    • Damage to individual buildings and roofs;
    • Disruption or restriction of road, rail, water and air traffic;
    • Movement of securely anchored objects with a larger surface area, such as tents and scaffolding, as well as moveable objects such as garden furniture;
    • Electricity grid outages and/or failure of telephone networks
  • Behaviour:
    • Keep an eye on local weather developments
    • Stay away from forests
    • Secure any free-standing objects
    • Always follow the official advice
  • Description of measurement and prognostic values:
    • Top wind speeds in low to medium-altitude areas (incl. Foehn winds): 110-140 km/h
    • Top wind speeds in higher-altitude areas (>1800 m above sea level): 160-200 km/h
Danger level 5 (Very high danger)
  • Effects:
    • Falling trees or entire groups of trees or sections of forest as well as electricity pylons and poles;
    • Severe damage to buildings;
    • Road, rail, water and air traffic disrupted or at a standstill;
    • Toppling of larger (empty) vehicles;
    • Securely anchored objects with a larger surface area, such as tents and scaffolding, as well as moveable objects such as garden furniture etc. can be blown over;
    • High waves on lakes, which wash over the banks or shores
    • Electricity grid outages and/or failure of telephone networks for long periods of time and over widespread areas
  • Behaviour:
    • Keep an eye on local weather developments
    • Stay away from forests
    • Secure any free-standing objects
    • Always follow the official advice
  • Description of measurement and prognostic values:
    • Top wind speeds in low to medium-altitude areas: > 140 km/h
    • Top wind speeds in higher-altitude areas (>1800 m above sea level): > 200 km/h
No danger level

No evaluation