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Discussed in the following Daily reports:
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1. Impact
An outbreak of severe convection occurred on 5th May 2015 (the first such outbreak of 2015 over Europe). It affected mainly The Netherlands and Germany, but to some extent also Austria and the Czech Republic. Severe thunderstorms developed from the Netherlands into North Germany yesterday afternoon into evening. Those produced very large hail, severe convective wind gusts and a number of tornadoes in NE Germany. One of these was pretty strong of category F2 or even F3 according to the damage it caused near Schwerin. There is a YouTube video of one of those tornadoes showing a spectacular supercell with nice visible rotation and a tornado forming (see ). The lightning map shows lightning activity accoding to different time frames. Approaching the end of the day severe storms started developing in northern Austria where there is a severe weather report of 20mm of rain in 40min from 1:40 a.m. on the 6 May. These severe thunderstorms occurred over an area of high instability (high CAPE) and high wind shear. These conditions favour development of supercells and long-living storms.
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