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Slides adapted from a lecture given by Dr. Kelvin Droegemeier

Slides adapted from a lecture given by Dr. Kelvin Droegemeier. The Hodograph. 2 km. 1 km. 3 km. SFC. Typical Supercell Hodograph. Strong wind, shear vector turns with height, strong S-R winds Note curved shape of hodograph at low levels. Storm-Relative Environmental Helicity. 2 km.

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Slides adapted from a lecture given by Dr. Kelvin Droegemeier

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  1. Slides adapted from a lecture given by Dr. Kelvin Droegemeier

  2. The Hodograph 2 km 1 km 3 km SFC

  3. Typical Supercell Hodograph • Strong wind, shear vector turns with height, strong S-R winds • Note curved shape of hodograph at low levels

  4. Storm-Relative Environmental Helicity 2 km 1 km 3 km SFC Storm-relative winds

  5. Storm Relative Helicity 180 This area represents the 1-3 km helicity 3 km 4 km 2 km 5 km 7 km 6 km 1 km Storm Motion SFC 270 SREHPotential Tornado Strength 150 - 300 m2 s-2 Weak 300 - 500 m2 s-2 Strong > 450 m2 s-2 Violent

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