Table of Contents


I Introduction

Get an overview on a meteorological phenomenon called Upper-Level-Low and on the impact it has on weather.


II The Life Cycle of Upper-Level Lows

Learn more about Upper-Level Troughs and the Rossby waves and see how they interact.


III The Upper-Level Trough Stage

See in this chapter how Upper-Level-Lows are created and why they are a common phenomenon in mid-latitudes.


IV The Tear-Off Stage

This is a major step in the life cycle towards a cold core low. Check-out the meteorological parameters that characterize this transition phase.


V The Cut-Off Stage

In this chapter you will see some examples of cold core lows that are cut-off from the trough in which they were created and you will get a description of the typical weather that can be expected below such a cold core low.


VI The Dissipation Stage

The dissipation stage marks the end of the life cycle.


VII Exercises

Check-out your understanding of that phenomenon by answering the quizzes.


VIII Case Study: Floods in Central Europe 2021

In the last chapter of this training module, you will have a closer look on an exceptionally intense and long lasting Upper-Level-Low that caused many damages especially over Germany and Austria.




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