The parameters in the following list are divided into parameters which are absolutely necessary for the diagnosis of a Comma (Key Parameters), parameters which give more information about the Comma (Supporting Parameters) and parameters which are not essential.
Choose the parameters you regard as Key Parameters for a Comma from the list below and submit your choice by clicking on the button at the bottom!

Height Contours at 1000 hPa (H1000)
Height Contours at 500 and/or 300 hPa (H500/300)
Isotachs at 300 hPa (Isot300)
Curvature Vorticity (CV)
Shear Vorticity (SV)
Wind Vectors at low levels (DDLow)
Wind Vectors at middle levels (DDMiddle)
Wind Vectors at high levels (DDHigh)
PVA at 500 hPa (PVA500)
PVA at 300 hPa (PVA300)
Height of PV = 2 units (PV)
TFP (TFP)
Equivalent Thickness (Th.)
Temperature Advection at Middle Levels
Temperature Advection at High Levels
Showalter Index (Show.)
Equivalent Potential Temperature at 850 hPa (ThetaE)
Divergence (Div)

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