Landfalling Fronts and Cyclones

Landfalling Fronts and Cyclones

Performance Objectives
After completing the module, the learner should be able to do the following tasks:

  • Describe the conditions under which flow becomes blocked by topography.
  • Given the wind speed, stability (Brunt-Vaisala Frequency), and mountain height, determine whether flow will be blocked by topography.
  • Describe how the angle between a landfalling front and the coastline affects the flow/topography interaction.
  • Describe how the prefrontal environment may experience enhanced stability.
  • Describe the conditions that lead to formation of a barrier jet.
  • Describe the change in the pressure field as cold fronts make landfall.
  • Given a landfalling front under conditions conducive to flow blocking, describe the anticipated effects on the motion of the cold front, the wind field, and the precipitation field.
  • Given a landfalling front under conditions that are not conducive to flow blocking, describe the anticipated effects on the motion of the cold front, the wind field, and the precipitation field.
  • Describe the advantages in using a high-resolution model to forecast the effects of landfalling fronts, compared to lower-resolution models.