Stormar i Sydsverige

Sammanfattning: Many people believe that there are more windstorms today than before. In order to find out, it requires knowing what defines a windstorm: the average wind speed must exceed 24,4 m/s to be classed as a windstorm. The average wind speed is measured for a 10 minute period. There are gusts which are strong winds that only blow for a few seconds to a minute. These may reach gale force even if it’s not a windstorm according to the average wind speed. To investigate whether it storms more today than before the geostrophic wind can be explored; this is a theoretical wind that depends on the air pressure and the Coriolis force. This is used because the wind measurements in the past weren’t on the same height and there were few stations. Pressure measurements are more reliable and these go further back in time. From 1961 there are series of wind measurements from some stations that you can explore and see whether the geostrophic wind is reliable or not. It is difficult to get an answer on whether the windstorms have become more or not. Research shows that they are not likely to have become more, but hints that they may become more intense. The uncertainty is large so it is difficult to know if this is the case.