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(1)

SCP = Supercell Composite Parameter

CAPE = Convective Available Potential Energy SRH = Storm Relative Helicity

BWD = Bulk Wind Difference

LFC is the level of free convection

EL is the level of neutral buoyancy (or Equilibrium Level) Tap =temperature of the air parcel

Te = temperature of environment

BWD= could be found at the most unstable parcel level on the sounding and then correlate that level to the hodograph. Lift that parcel then figure out what height is 50% of the way to the EL for that parcel.

Vh= horizontal vector C =storm motion vector

= horizontal vorticity vector

SCP = (CAPE/1000 j.kg

-1

) x (SRH/50 m

-2

.s

-2

) x (BWD/20m.s

-1

)

Carbin et al.2016

Update 14Jul2017

Carbin GW, Tippett MK, Lillo SP, Brooks HE. Visualizing long-range severe thunderstorm environment guidance from CFSv2. Bulletin of the American Meteorological Society.

2016;97:1021–1031

(2)

SCP = Supercell Composite Parameter

MUCAPE = Convective Available Potential Energy of the Most Unstable SRH = Storm Relative Helicity

BRN = Bulk Richardson Number is one-half of the squared difference between the density (U

2

/2) weighted mean winds in the 0–6-km and 0–500-m layers

If MUCAPE = 1000 J/kg; SRH = 150 M**2/S**2; BRN shear term = 40 m**2/s**2 , then SCP = 1 SCP> 1 for supercells; SCP<1 nonsupercell storms

STP = Significant Tornado Parameter

0–6-km AGL vector shear = shear vector magnitude between the surface and 6 km AGL 0-1km SRH = Storm Relative Helicity

MLCAPE = Mean Level Convective Available Potential Energy lowest 100mb MLLCL = Mean Layer of Lifted Condensation Level Height

Baker et al.2009

Baker, A. K., Parker, M. D., & Eastin, M. D. (2009). Environmental ingredients for supercells and tornadoes within Hurricane Ivan. Weather and Forecasting,24, 223–

244.10.1175/2008WAF2222146.

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