What Is Backbuilding?
When new storms keep forming on the upwind side of a storm cluster, so the rain area stays in one place instead of moving on. It is a major cause of flash flooding. In technical terms: Convective propagation in which new cells develop repeatedly on the upstream (often southwestern) flank of a system, typically where low-level inflow meets an outflow boundary, so that propagation offsets cell advection and the system is quasi-stationary.
Also called: Back-Building
Backbuilding In Plain English
When new storms keep forming on the upwind side of a storm cluster, so the rain area stays in one place instead of moving on. It is a major cause of flash flooding.
The Technical Definition
Convective propagation in which new cells develop repeatedly on the upstream (often southwestern) flank of a system, typically where low-level inflow meets an outflow boundary, so that propagation offsets cell advection and the system is quasi-stationary; closely related to training and diagnosed with Corfidi upwind vectors.
Lessons That Use Backbuilding
- Flash Floods And River Floods Unit 9: Hail And Flooding
