Recognition of Buoyancy and Shear Environments Conducive
to Shallow Supercell Formation
"...our results indicate that for
moderate to high vertical shears and small parcel buoyoancy below
500 mb, the simulated mini supercells generate similar mesocyclones
(compared to high buoyancy Great Plains' cases), even though
the total CAPE was a factor of 2-3 times smaller for mini-supercell
cases..."
Wicker, L.J. and L. Cantrell, 1996:
The role of vertical buoyancy distributions in miniature supercells.
18th Conference on Severe Local Storms, San Francisco, CA.
"...although parcel buoyancy is
often small...(with shallow supercells), its concentration in
the strongly sheared lower troposphere promotes the development
of vertical pressure forces comparable to those seen in simulated
Great Plains' supercells..."
"...such storms (shallow supercells)
are often forecast poorly because of the unusually low CAPE.
Our results help to clarify how such environments may still produce
shallow supercellular updrafts that could lead to tornadogenesis
and other severe weather manifestations..."
McCaul, W.W. Jr. and M.L. Weisman,
1996: Simulations of shallow supercell storms in landfalling
hurricane environments. Monthly Weather Review, Vol. 124, 408-429.
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