May 16. This week in Norway has extremely warm weather. In one of these serene days in the valley L? Rdal appeared unusual.
Thermometer in the shade 25 ° C, this mark is 10 ° C higher than the normal temperature in May.
In one of the serene days in the valley L? Rdal appeared unusual — a cloud of dust, the funnel reached several tens of meters in height.
Clouds of dust in the English language are called «dust devil». In hot weather, the earth's surface is heated to such an extent that it becomes hotter than the air — because of this temperature difference creates miniature cyclones, or clouds of dust.
This phenomenon is different from a tornado in that it is always accompanied by clear skies. The flow of air lifts up dust, earth, plants, making a cloud of dust ironed very picturesque.