Supercell Tornadoes, Non- Supercell Tornadoes, and Gustnadoes.

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Supercell Tornadoes, Non- Supercell Tornadoes, and Gustnadoes

Supercell Tornado Tornado associated with a supercell and mesocyclone. o Parent storm is persistent, organized, and has an associated mesocyclone. Formation: o Not 100% understood. o Stretching and tilting of vorticity o Rear flank downdraft Identify: o Supercell features present FFD, flanking line, evidence of rotation in the storm

Supercell Tornado Flanking LineRotation FFD

Non-Supercell Tornado (Landspout) By definition this is a tornado. o Not associated with a supercell or mesocyclone, however. Associated with a strong updraft. Difficult to identify with radar o Storm may be very small or essentially non-existent on radar. Very little reflectivity Formation: o Boundary creates localized vorticity (spin) near the surface. o Strong updraft moves over this vorticity and quickly stretches it. Identify: o No supercell features. o Frequently a flat updraft base with a towering cumulus is all that is visible.

Non-Supercell Tornado

Gustnado Forms along outflow from thunderstorms o Eddy along a gust front. o Leading edge of squall line or RFD gust front. Does not connect (reach) to the cloud base Not a tornado Short lived and ground based (little vertical extent)

Gustnado Possible gustnado locations

Tornado, Landspout, or Gustnado?