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Cyclone Niklas also named Lentestorm (spring storm) by KNMI was a European windstorm that affected areas of western and central Europe with widespread disruption to air, shipping and road transport at the end of March 2015. The storm also caused forestry and property damage, power outages, and led to the loss of several lives. ==Meteorological history== Preceding the development of the Niklas storm on 28–29 March strong rainfall was reported in the southern Germany. The 24-hour rainfall of 29–30 March in the Black Forest saw more than 60 liters fall per square metre.〔 The Niklas storm was preceded by the low pressure named Mike by the Free University of Berlin, which brought hurricane strength winds to Germany on the 30th March. Gust reports from this low pressure at the high-altitude stations of Brocken were of (force 12) and Zugspitze . The Niklas storm began to develop on the 29 March off the Newfoundland coast. Powerful air temperature differences across Europe led to a strong upper air flow at 2.5 km altitude. Embedded in this was a shortwave trough, which promoted the intensification of the surface low Niklas as it came across Scotland. A plume of colder air from area of Iceland and Greenland also formed a strong temperature gradient with warmer air masses from the Atlantic circulating around high pressure centred to the west of Iberia which helped intensify the storm.〔 Together with an area of low pressure over Scandinavia, which formed a strong air pressure pressure gradient across north-west Europe, The approach of the low pressure saw a tightening of the air pressure gradient especially in the German Bight and north west Germany. The pressure difference being between 1035 hPa in the high pressure situated to the west of Iberia, to a low of 971.4 hPa recorded at the Ekofisk platform in the North Sea.〔 This situation was coupled with a powerful jet stream above the developing storm. Niklas developed as it crossed the UK reaching a low pressure 971.4hPa as it crossed the North Sea, and in the course of a day moved to southern Denmark before continuing to the southern Baltic Sea and on towards the Baltic States. The storm field drew across Western Europe on 30 and 31 March 2015, reaching the Netherlands and large areas of Germany on 31 March 2015. Hurricane force winds were reported in Germany, according to the German Weather service (DWD) with a peak gust at altitude on the mountains of Zugspitze (192 km/h), the Brocken (162 km/h), Feldberg in the Black Forest (151 km / h) and on Weinbiet in Neustadt (148 km/h). At lower elevations on the North Sea coast peak gusts of 140 km/h were reported.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cyclone Niklas」の詳細全文を読む スポンサード リンク
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