Rear flank downdraft

Definition

A rear flank downdraft is a strong downdraft that occurs on the back side of a thunderstorm, particularly within supercell storms. This feature plays a critical role in tornado formation by enhancing the rotation of the storm and providing a source of low-level wind shear, which can lead to the development of a tornado. Understanding this phenomenon is essential for grasping the dynamics of tornado genesis, structure, and classification.

5 Must Know Facts For Your Next Test

1. Rear flank downdrafts are typically formed when the precipitation-cooled air in the storm descends and wraps around the back side of the storm structure.
2. These downdrafts can strengthen the low-level rotation of the storm, increasing the likelihood of tornado formation.
3. The intensity and depth of a rear flank downdraft can vary significantly, influencing the overall dynamics and potential severity of the storm.
4. Meteorologists often monitor rear flank downdrafts to predict tornado development, as their presence can indicate conditions favorable for tornado genesis.
5. Rear flank downdrafts are generally associated with supercell thunderstorms, which are known for their organized structure and potential for producing severe weather.

Review Questions

• How does a rear flank downdraft contribute to the dynamics of a supercell thunderstorm?
  • A rear flank downdraft contributes to the dynamics of a supercell thunderstorm by enhancing low-level rotation and providing necessary wind shear. As the downdraft descends and wraps around the storm, it can interact with existing updrafts, creating conditions that favor tornado formation. This interaction is crucial for maintaining the organized structure of supercells, which are known for their ability to produce severe weather.
• In what ways can meteorologists utilize information about rear flank downdrafts in their forecasting efforts?
  • Meteorologists can use information about rear flank downdrafts to improve their forecasting efforts by monitoring their presence and intensity during severe weather events. By understanding how these downdrafts affect storm rotation and overall dynamics, forecasters can better predict the likelihood of tornado formation. This information is vital for issuing timely warnings and ensuring public safety during severe weather outbreaks.
• Evaluate the relationship between rear flank downdrafts and tornado genesis within supercell storms, considering factors that influence this process.
  • The relationship between rear flank downdrafts and tornado genesis within supercell storms is critical, as these downdrafts significantly enhance low-level wind shear necessary for tornado development. Factors such as the strength of the downdraft, ambient wind profiles, and moisture availability all play roles in determining whether a tornado will form. By evaluating these interconnections, researchers can gain insights into the mechanisms behind tornado formation and improve predictive models for severe weather events.

Related terms

supercell: A type of thunderstorm characterized by the presence of a rotating updraft called a mesocyclone, which is conducive to severe weather and tornadoes.

tornado: A rapidly rotating column of air that extends from a thunderstorm to the ground, often associated with severe weather conditions.

updraft: A rising current of warm, moist air within a storm, which is crucial for storm development and maintenance.