Extratropical storm tracks play a major role in shaping the Earth's climate by transporting energy, moisture and momentum through the atmosphere. Any change in their average position and intensity will have a major impact on the midlatitude weather and global climate. In this thesis we use energy and momentum conservation equations to study the dynamics of extratropical storm tracks on different timescales. The main goals of this thesis are (i) to develop a new energetic framework for storm track shift that can be connected to external radiative forcings, (ii) to provide a deeper understand about why storm tracks exhibit different hemispheric seasonality on Earth, and (iii) to improve our dynamical understanding of atmospheric block formation within the storm track.