Thunderstorm Development, 5th July 2015

July 5th 2015 in Germany. A significant weather situation occurs in Central Europe. Watch the video to see the development of strong thunderstorm activity in Germany.

Initially, some weak thunderstorms evolve which then move slowly to the northeast. The storm system is kept alive because new cells are generated from downdrafts of old cells. If they didn’t exist, the cells wouldn’t arise. So the thunderstorms are developing rapidly, growing and travelling quickly.

There is a lot of energy in the air because of the unusual heat in Germany; more precisely it is above 35 degrees Celsius. A cold front crosses over Germany, but it leads only to thunderstorms in the northern part. Thunderstorms develop next to the cold front because the temperature difference has increased there. The strongest storm starts at 1.10 p.m. and lasts until 9.39 p.m. This is a timespan of 8 hours and 28 minutes! 204,394 strokes are measured in this thunderstorm with the highest flash density near Ahnsbeck, which is to the east of Celle, Germany.

However, it is still hot in the south because of warm air from the southwest. Later in the day, thunderstorms are triggered in the southern parts of Germany, too, due to upper-level cold advection which has been caused by the cold front. These storms evolve fast because energy-rich air is still available in these regions.

Overall, 590,000 strokes hit the ground in Germany, which is about two-thirds of the usual amount of an entire year.

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