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Deep Convection Conceptual Models Based on Physical Processes Discussion. Ordinary Cells Multicell storms Supercells . Ordinary Cells. Notice: First radar-detected echo is aloft, not at the surface No updraft tilt Precip core and downdraft wipe out updraft

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deep convection conceptual models based on physical processes discussion

Deep Convection Conceptual Models Based on Physical Processes Discussion

Ordinary Cells

Multicell storms

Supercells

ordinary cells

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.

multi cells

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)

multi cells1

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)

multi cells2

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.

multi cells3

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

multi cells4

Multi Cells

Cloud features and weather:

Shelf cloud

Overshooting tops

Back shear anvil

hail

High winds

Possible tornadoes on the

gust front

multi cells5

Multi Cells

Shelf cloud example:

supercells

Supercells

Notice:

This evolution is for a straight hodograph

Produces mirror image split supercells

supercells1

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

supercells2

Supercells

Notice:

This evolution is for a counterclockwise turning hodograph

Produces a dominant left mover

Not commonly observed over the US Plain States