Berlin, August 1, 2017: Spectacular Evening Sky

On August 1 again a hot air mass met a cold air mass over Germany. Subsequently, there was an air mass limit. Air mass limits are often the reason for severe weather events like extreme thunderstorms with tornados and flooding or downbursts.

(A good definition what an air mass is could be found at the UK met office:http://www.metoffice.gov.uk/learning/learn-about-the-weather/how-weather-works/air-masses.)

Severe storms were expected, the weather service also issued a warning for Berlin. In the afternoon and evening, a line of thunderstorms appeared. There was severe weather in Brandenburg and many other areas. However in Berlin after a short time of rain, the turbulent sky opened a bit and a red evening sun was illuminating the dramatically structured clouds.




Many people stopped and took pictures of the unusual weather situation. Of course, evening-glow happens a lot but this dramatic sky was extraordinary. One reason for this impressive sky is that if you have a weather situation with thunderstorms close or developing there is a chaos in the atmosphere. There are several levels in the lower and higher atmosphere with different clouds and there is a lot of circulation.

 

The impressive scenery lasted till it became dark. There was only a little wind and it was still very warm in the city during the night. Some sheet-lighting could be seen later but the bigger storms happened more in the South.

It was a relief after two severe storms with extraordinary flooding hit the city two times before.

But summer 2017 is very unpredictable in Europe. Two days later a very strong cell did damage in the South of Berlin and later in August Austria suffered from storms with heavy rain followed by mud-slides.

On the south-side of the Alps in Italy there are still heat-waves. As mentioned before these weather-patterns fit in the scenarios developed by scientists about effects of climate change.

 

There is a good-viewpoint between railway station “Gesundbrunnen” in Berlin and the well-known Bornholmer Straße. The pictures below were taken from a small bridge named “Schwedter Steig”. I had seen that bridge a couple of times when using the train. Its always useful particularly if you want to do weather-pictures to have an inventory of good view-points before, since if an interesting weather pattern occurs there is no time to search for a good place with a lot of open skies to take pictures or videos.

 

 

 

 

 

 

 

 

 

 

SHEET LIGHTNING: VIDEO BERLIN, AUGUST 28, 2016

Summer 2016 in Middle Europe: another year with new temperature records. August 28 was an extremely hot day in Berlin with temperatures over 34 C. Already the day before there had been some severe thunderstorms in Western Germany. A cold front was coming in from the west and in the afternoon the German Weather Service issued a warning for severe weather with strong wind gusts, thunderstorms and hail for Berlin and Brandenburg. However following nowcasts as provided by from some webpages showed that weather was very unpredictable that Sunday in Eastern Germany. It looked a couple of times as there were stronger thunderstorms taking course towards the East, then they lost their energy but in the evening some stronger storms appeared suddenly. Before the front arrived in Berlin the air became really hot and humid. It was sticky and the sky became overcast. In the south of Brandenburg there was already a strong thunderstorm. It was the typical scenario when you expect the worst. You could feel the tension.

Nevertheless there wasn’t a strong hit in Berlin, but a visually impressing storm system in the East of the City which generated sheet-lightning in the West. It was already nearly dark when that storm approached. Later, in the west side of the city there was only rainfall for some minutes. In other parts of Germany there were serious damages due to the collision between warm and cold air. There was a rotating supercell causing flooding in Hamburg and another storm did damage for example in Stendal. Lightning stopped trains in Hannover. The next day temperatures had dropped dramatically. In some places there was a temperature fall of 15 degrees. It was a release after these unusual hot days end of August. The learning lesson was that precise now-casts are still a difficult thing to do when there is chaos in the atmosphere, but should definitely further developed and made more popular since they could be a life-saving tool. Furthermore the trend of climate change related extremes continues in 2016. Adaption strategies seem mandatory for example for farming which suffered both from flooding and too much heat and droughts in other areas. It would be also worth to further investigate the connections between extreme weather and traffic accidents. Perhaps it’s a coincidence but there had been some accidents already before the thunderstorms arrived that day. Maybe the tension in the air, the humidity and the heat strongly affects the concentration of drivers. The situation in Berlin was worth for a little experiment with slow motion and an editing which created an effect similar to a time-lapse on the other side. Together with cross-dissolve transitions the video has perhaps a bit of a supernatural air:

Thunderstorm, Berlin 28. August 2016 from Peter Engelmann on Vimeo.