1. Ordinary Cells Multicell storms Supercells
Deep Convection Conceptual Models Based on Physical Processes Discussion
Ordinary Cells
Multicell storms
Supercells

2. Ordinary Cells Notice:
First radar-detected echo is aloft, not at the surface
No updraft tilt
Precip core and downdraft wipe out updraft
Gust front spreads out equally in all directions
Storm motion is mean 0-6 km environmental flow.

3. Multi Cells Notice: Cells in different stages of their evolution
New cell development occurs on the downshear side of the gust front (cold-pool/shear balance occurs there)

4. Multi Cells Notice: Cells in different stages of their evolution
New cell development occurs on the downshear side of the gust front (cold-pool/shear balance occurs there)

5. Multi Cells
Notice:
The reflectivity at the ground is largely associated with cell number 3.
The updraft may have some tilt to it if there is some shear through a layer deeper than the cold pool.

6. Multi Cells
Notice:
The updraft and downdraft are well separated – allows the system to live for a long period of time
In a system relative sense, the inflow is from the east if the shear vector is westerly

7. Multi Cells Cloud features and weather: Shelf cloud Overshooting tops
Back shear anvil
hail
High winds
Possible tornadoes on the
gust front

8. Multi Cells
Shelf cloud example:

9. Supercells Notice: This evolution is for a straight hodograph
Produces mirror image split supercells

10. Supercells
Notice:
This evolution is valid for a clockwise turning hodograph
Produces a dominant right-moving supercell
Is typically observed over the US Plain States in spring and early summer

11. Supercells
Notice:
This evolution is for a counterclockwise turning hodograph
Produces a dominant left mover
Not commonly observed over the US Plain States

12. Supercells

13. Supercells

14. Supercells