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The Super Tuesday Outbreak of 5-6 February, 2008
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Hypothesis Upper-level trough in the Plains Shortwave passing through Low-level jet from Gulf of Mexico Moisture advection from south Strong, veering winds Neutral layer near surface
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Conceptual Model
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Not Quite Type B...
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Mesoscale Factors (0000 UTC)
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Nashville Sounding (0000 UTC)
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Trigger 1: The Low-Level Jet 1800 UTC (1200 LST) 2100 UTC (1500 LST)
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Trigger 2: Shortwave 0000 UTC (1800 LST)
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The Supercell
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Type B Legacy: Nighttime Tornadoes LSTUTC 5:02 PM2302ATKINS POPE AR3524 9295 *** 3 FATAL *** 6:25 PM00255 SW DANCYVILLE FAYETTE TN3537 8936 *** 1 FATAL *** 6:42 PM00426 NNW MERCER MADISON TN3556 8905 *** 2 FATAL *** 7:30 PM0130MORRIS CHAPEL HARDIN TN3532 8835 *** 2 FATAL, 5 INJ *** 7:40 PM01404 NW SAVANNAH HARDIN TN3526 8829 *** 3 FATAL, 5 INJ *** 7:44 PM01441 W GREENVILLE MUHLENBERG KY3721 8720 *** 3 FATAL *** 10:10 PM04105 W HARTSVILLE TROUSDALE TN3639 8625 *** 2 FATAL *** 1:45 AM07459 SSE SCOTTSVILLE MACON TN3663 8613 *** 4 FATAL *** 1:45 AM07457 SSE SCOTTSVILLE ALLEN KY3666 8615 *** 4 FATAL *** 3:20 AM09206 SE MOULTON LAWRENCE AL3442 8721 *** 3 FATAL *** 5:20 AM1120PISGAH JACKSON AL3468 8585 *** 1 FATAL ***
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References Martin, Jonathan E. Mid-Latitude Cyclone Dynamics: A First Course. Wiley Publishing, 2006. Blanchard, D. O., 1998: Assessing the vertical distribution of convective available potential energy. Wea. Forecasting, 13, 870–877. Miller, R.C., 1972: Notes on Analysis and Severe-Storm Forecasting Procedures of the Air Force Global Weather Central. Air Weather Service, 1-23. Monette, S. A. The Parkersburg, IA EF-5 Tornado: Destruction Amidst the Rain. 2009. Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison. Hayes, J. L. Super Tuesday Tornado Outbreak - Executive Summary. 2008. National Weather Service. National Weather Service-Memphis, 2008. February 5, 2008 Storm Damage Survey..http://www.srh.noaa.gov/meg/?n=feb52008tornadooutbreak SPC Severe Event Index Lecture 11 Powerpoint
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