Cut off low in upper levels without corresponding surface low, accompanied by cloud bands at the boundaries and convective cloud in the low center.
Building on the basic discussion of the Conceptual Model (CM) Upper Level Low (ULL) and its life cycle‒the cut off process‒emphasis is put here on a special region in Europe, the Iberian Peninsula, where ULLs are a well-known phenomenon and are very often accompanied by heavy, even catastrophic, weather events, especially in the east and south of Spain. They have a special name: DANA (Depresión Aislada en Niveles Altos: Isolated Upper Level Low) and/or Gota Fría (Drop of cold air).
I. Cloud Structure In Satellite Images
Learn about how to recognise and detect Upper Level Lows in satellite images.
II. Meteorological Physical Background
Find out more about the meteorlogical and physical background of Upper Level Lows.
III. Key Parameters
Learn which key parameters to use for monitoring Upper Level Lows.
IV. Typical Appearance In Vertical Cross Sections
Find out the typical appearance of Upper Level Lows in vertical cross sections.
V. Weather Events
Explore the weather events associated with Upper Level Lows.
VI. References
Let these comprehensive documents in the references assist you in finding more about Upper Level Lows.