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Thus´rsday, 15 July 2021, 08:00 UTC





Sea level pressure, 15.07., 00 UTC
Source: DWD
120h precipitation, 18.07., 12 UTC
Data Source: DWD, Visualization: B. Mühr
32h precipitation NRW, 15.07., 18 UTC
Data Source: DWD, Visualization: B. Mühr
Flooding near Eggenstein-Leopoldshafen, 14.07.
Source: Fabian Siegmann


Intense Precipitation / Flooding
Western Germany

Issued: Thursday, 15 July 2021, 08:00 UTC

Still productive precipitation over large parts of southern and western Germany caused by isolated low pressure area BERND. Many rivers are flooded with water levels in the order of HQ2 to HQ5.

13.-17.07.2021


The already high water levels in southern and western Germany due to the high precipitation of the past days will be further aggravated by large-scale stratiform rainfall around the isolated low-pressure system BERND. In North Rhine-Westphalia, additional accumulated precipitation of up to 150 mm is to be expected locally.

In Maxau, Baden Wuerttemberg, the Rhine is currently already at a water level in the range of a two-year flood (already for the second time this year after the end of January. Since the weather forecast models have problems to predict the spatiality and intensity of the current precipitation, the water level forecast is also subject to great uncertainties. However, an increase to a 10-20 year flood is still possible in the next two days and should be considered when taking protective measures.

The Ruhr in Hattingen (North Rhine-Westphalia) has reached a level of 6.87 m at 05 UTC beating the previous all-time record from the year 2016 (6.17 m).


Tuesday, 13 July 2021, 14:30 UTC





Accumulated precipitation amount, 16.07., 09 Z
Source: Wetterzentrale
Analysis Surface pressure, 15.07., 12 UTC
Data Source: Wetterzentrale
Pseudopotential Temperature 850 hPa, 15.07., 12 Z
Data Source: Modellzentrale
Water level prediction (Speyer/Rhein), 13.07.
Source: Hochwasserzentrale


Intense Precipitation / Flooding
Western Germany

Issued: Tuesday, 13 July 2021, 14:30 UTC

Intense precipitation with accumulated amounts up to 200 mm until Friday will cause floodings and a substantially increase of water levels on bigger rivers in southwestern Germany!

13.-17.07.2021


A slow moving low pressure system over central Germany cause strong temperature differences in central Europe. To the east of the cyclone, hot and humid air masses from the southeast are transported northward. At the same time, cool air masses reach the south from the eastern atlantic. A strong ground-level convergence forms at the air mass boundary, along which repeated heavy precipitation occurs. On the warm side, strong thunderstorms will occur today, which will turn out to be severe, especially with regard to the heavy rain. Today, the greatest severe weather potential is in southern North Rhine-Westphalia as well as in eastern Belgium and Rhineland-Palatinate. There, locally more than 120 mm will be reached in 24 hours. In addition, heavy thundery downpours can bring more than 50 mm in a few hours. But also in the remaining parts of southwestern Germany, Belgium and northeastern France, 40 to 100 mm can be expected within 24 hours. This will lead to more widespread flooding and high water initially on individual smaller rivers and in the course of the week also on larger rivers. With short interruptions, there will also be further rainfall in the coming days until Friday, whereby a larger flood is expected on the Rhine on Saturday. Further information on the warning situation will follow in the next few days.


Issued: July 13, 2021, 14:30 UTC
NB

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