SPC Mesoscale Analysis and Convective Parameters - NOAA

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Craven (SPC)-Brooks (NSSL) Research • Initially examined 0000 UTC soundings from 1996-1999 (~60,000) and associated each sounding within 5 classes: •No Thunderstorms (45508 soundings) •Non-Severe Thunderstorms (11339 soundings) •Severe Thunderstorms (2644 soundings) •Significant Hail or Wind (512 soundings) •Significant Tornado (87 soundings) •CG lightning data and Storm Reports were used to determine the convective classes •Proximity defined as within 185 km of sounding and event occurring between 21-03 UTC (+/- 3 hours)
Edwards/Thompson (SPC) Research Used RUC2 proximity soundings for identified supercells Supercell sample included 96 tornadic and 92 non tornadic supercells
Page 1 and 2: SPC Mesoscale Analysis and Convecti
Page 3 and 4: Why do Surface Mesoanalysis? • Fo
Page 5 and 6: Use Computer and Forecaster Analyse
Page 7 and 8: Observational Sources used in SPC M
Page 9 and 10: Techniques to Help Identify Surface
Page 11 and 12: Mesoanalysis Pressure/Wind Data •
Page 13 and 14: Severe Weather Forecast Tools
Page 15 and 16: SBCAPE
Page 17 and 18: 100 mb MLCAPE
Page 19: Research Proximity Soundings ** Pro
Page 23 and 24: Deep Layer Shear Deep layer shear =
Page 25 and 26: Craven/Brooks 0-1km Vector Shear 0-
Page 27 and 28: 0-1 km SRH
Page 29 and 30: Thompson/Edwards MLLCL Heights
Page 31 and 32: Craven/Brooks Findings • MLCAPE a
Page 33 and 34: SIMILAR SOUNDINGS - DIFFERENT CONVE
Page 35 and 36: Supercell Composite Parameter (SCP)
Page 37 and 38: Example of SCP Graphic
Page 39 and 40: STP Equation STP = (MLCAPE/1000 J/k
Page 41 and 42: Example of STP
Page 43: Research Summary •Proximity sound

SPC Mesoscale Analysis and Convective Parameters - NOAA

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