… (a) The spatial structure of the predictable component (color shading) that maximized the
average predictability time of storm tracks in the seasonal hindcasts for the DJF season,
which is called PrC1. The black contour denotes the climatological storm tracks (in hPa).
The shading unit … (a) The spatial structure of the second predictable component (color
shading, in hPa per unit standard deviation) that maximized the average predictability time
of storm tracks in the hindcasts for the DJF season, which is called PrC2. The black contour …

The midlatitude storm tracks are regions of frequent baroclinic waves and associated sur-26
face cyclones and anticyclones. These storms are characterized by strong winds and heavy
27 precipitation, and all are thus a source of extreme regional weather and climate events.
28 Additionally, the poleward transport of heat, momentum and moisture associated with mid-
29 latitude storms is a prominent part of the global circulation system. Thus, predicting and
30 projecting future changes of storm tracks is of huge societal and scientific interest. 31 Mid …