The Super Tuesday Outbreak of 5-6 February, 2008.
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Transcript of The Super Tuesday Outbreak of 5-6 February, 2008.
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The Super Tuesday Outbreak of The Super Tuesday Outbreak of 5-6 February, 20085-6 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
LST UTC5:02 PM 2302 ATKINS POPE AR 3524 9295 *** 3 FATAL *** 6:25 PM 0025 5 SW DANCYVILLE FAYETTE TN 3537 8936 *** 1 FATAL ***6:42 PM 0042 6 NNW MERCER MADISON TN 3556 8905 *** 2 FATAL ***7:30 PM 0130 MORRIS CHAPEL HARDIN TN 3532 8835 *** 2 FATAL, 5 INJ *** 7:40 PM 0140 4 NW SAVANNAH HARDIN TN 3526 8829 *** 3 FATAL, 5 INJ ***7:44 PM 0144 1 W GREENVILLE MUHLENBERG KY 3721 8720 *** 3 FATAL ***10:10 PM 0410 5 W HARTSVILLE TROUSDALE TN 3639 8625 *** 2 FATAL ***1:45 AM 0745 9 SSE SCOTTSVILLE MACON TN 3663 8613 *** 4 FATAL ***1:45 AM 0745 7 SSE SCOTTSVILLE ALLEN KY 3666 8615 *** 4 FATAL ***3:20 AM 0920 6 SE MOULTON LAWRENCE AL 3442 8721 *** 3 FATAL ***5:20 AM 1120 PISGAH JACKSON AL 3468 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