1. The Super Tuesday Outbreak of 5-6 February, 2008

2. 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

3. Conceptual Model

4. Not Quite Type B...

5. Mesoscale Factors (0000 UTC)

6. Nashville Sounding (0000 UTC)

7. Trigger 1: The Low-Level Jet 1800 UTC (1200 LST) 2100 UTC (1500 LST)

8. Trigger 2: Shortwave 0000 UTC (1800 LST)

9. The Supercell

10. 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 ***

11. 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