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Modern Severe Weather Parameters at SPC

Modern Severe Weather Parameters at SPC . MSU November 5, 2003 Jeff Craven, NWS Jackson MS. Instability Parameters. 100 mb Mean Layer CAPE, Lapse Rates, DCAPE. MSU Nov 5, 2003 NWS Jackson MS. Low Level Moisture/Cloud Bases. 100 mb Mean Layer LCL height.

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Modern Severe Weather Parameters at SPC

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  1. Modern Severe Weather Parameters at SPC MSU November 5, 2003 Jeff Craven, NWS Jackson MS

  2. Instability Parameters 100 mb Mean Layer CAPE, Lapse Rates, DCAPE MSU Nov 5, 2003 NWS Jackson MS

  3. Low Level Moisture/Cloud Bases 100 mb Mean Layer LCL height MSU Nov 5, 2003 NWS Jackson MS

  4. Vertical Wind “Shear” 0-6 km and 0-1 km “bulk” shear MSU Nov 5, 2003 NWS Jackson MS

  5. Parameter Combinations MLLCL height versus 0-1 km shear MSU Nov 5, 2003 NWS Jackson MS

  6. Parameter Combinations Product of MLCAPE and 0-6 km shear (Craven SigSvr) (Units in m3 s-3) MSU Nov 5, 2003 NWS Jackson MS

  7. Parameter Combinations Strong Tornado Parameter (an alternative to Thompson’s Significant Tornado Parameter) MSU Nov 5, 2003 NWS Jackson MS

  8. Parameter Combinations Strong Tornado Parameter MLCAPE * 0-1km shear * 0-6 km shear _______________________________ MLLCL height * DCAPE (Units in m s-2 acceleration?) MSU Nov 5, 2003 NWS Jackson MS

  9. Parameter Combinations Supercell Composite Parameter Hart and Thompson, SPC MUCAPE * 0-3km SRH * BRN shear ______________________________ 1000 J/kg * 100 m2/s2 * 40 m2/s2 MSU Nov 5, 2003 NWS Jackson MS

  10. Parameter Combinations Significant Tornado Parameter Thompson, SPC MLCAPE * 0-1km SRH * 0-6 km shear * (MLLCL – 2000 m) ________________________________________________ 1000 J/kg * 100 m2/s2 * 20 m/s * 1500 m MSU Nov 5, 2003 NWS Jackson MS

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