Storms

If it storms at Copenhagen Airport, the direction of the wind is crucial, because if the wind is blowing in the right direction, the airport can still use both of its runways. If the wind is out of the south-west or north-east, storms present less of a problem than if it is blowing from the north-west or south-east.

The fact that a storm hits the airport is not a critical factor in itself. On the other hand, if the wind is blowing very hard, passengers on a flight will often find the turbulence an unpleasant experience.
  
Storms are especially common at Copenhagen Airport in the autumn. If a storm is on its way with winds blowing at more than 18 metres per second (35 knots), the Danish weather service will notify the airport, which then starts the procedures that are necessary depending on the speed of the wind. If winds reach about 45 knots, some activities are restricted, e.g. the de-icing equipment and the mobile stairways can no longer be used. On the rare occasions when the wind speed exceeds 45 knots, then Copenhagen Airport is forced to limit traffic for safety reasons.

We seldom see hurricanes at these latitudes. Last time we saw hurricane-strength winds was in December 1999, when a storm forced Copenhagen Airport to ground all air traffic.