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WeatherBlogs

WeatherBlog 10-2016 | Borderline weather

The outlook remains exciting

by Lea Hartl • 01/04/2016

The WeatherBlog is on its way and will be brief.

LH

Lorenzo Rieg

The weather in Central Europe is currently divided into two parts. A sharp air mass boundary separates the north and east from the much milder south and west. The differences are particularly evident in Germany, where, for example, temperature differences of up to 20° were measured on Monday. In Werl (NRW), on the warm side, the daily maximum temperature was 5.5°C, while in Diepholz, 120 km away on the cold side, it was only -4.7°C. The Alps are on the warm side of the air mass boundary in a humid westerly current.

The fresh snow and avalanche situation is also divided. While there are alarm-worthy amounts of snow in the western Alps, the east remains comparatively dry and is only covered in dust. Accordingly, the avalanche situation east of the Arlberg is relatively relaxed (because there is no snow) and becomes much more critical towards the west. The SLF is now issuing bulletins twice a day again (level 4 in the far west of Switzerland!) and an LLB has also been issued for Tyrol.

Further developments will initially be determined by a strong low over the British Isles. Towards the weekend, warm air will be shovelled towards us at the front of the low pressure system and the Alps will move into a SW current.

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The position of the Azores High will once again be exciting next week. Of course, it is still more in the realm of the crystal ball, but the models are currently in relative agreement that it will bulge towards Greenland. As a result, the large-scale flow pattern will turn from south/west to more northerly directions and cooler air will reach us. Depending on exactly what the Azores High has planned, there would be potential for a blocking situation with a pure northerly flow, which would be advantageous for the lowland winter. A somewhat milder NW flow is also possible if the high does not venture far enough north to produce a blocking. In any case, we're keeping our fingers crossed that it won't be pushed too far to the east. Then we would be in the middle of the high at some point and would have to deal with the opposite instead of more or less cold, humid air masses.

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WeatherBlog 9-2016 | Low Eckard and the North Pole

Lea Hartl • 12/29/2015

A powerful hurricane depression called Eckard has formed over Iceland. Between Eckard and a high pressure system over Scandinavia, the strong pressure difference is shoveling masses of warm subtropical air towards us and much further north. The North Pole reaches temperatures of almost 50° above average (equivalent to just above zero).
WeatherBlog 8-2016 | User question: when will the bad weather disappear?

Lea Hartl • 12/22/2015

At the moment, some people are probably wondering about the weather, which doesn't seem to fit in with the dream of a White Christmas. For example, the WeatherBlog received the following question: "Hi, can you explain when this warm and sunny bastard weather will disappear? And what does it have to do with climate change if it gets 2 degrees warmer overall? Why is it not -2 degrees in December instead of -5 degrees as it used to be, but +15 degrees for weeks on end? What does global warming have to do with the fact that in recent years we have often had a tendency towards a persistent mild south-westerly flow...?"
WeatherBlog 7-2016 | Climate conference in Paris

Lea Hartl • 12/15/2015

Unfortunately, the weather in the Alps continues to be rather stagnant and warm. A persistent trough in the North Atlantic is directing very warm air masses towards us. In the Alps, minor disturbances alternate with sunshine, while further north it has been and will continue to be very stormy (but still warm). A lasting change in the general weather situation is not in sight.