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April 26th-30th, 2014 Major Tornado Outbreak


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another one

 

SEVERE WEATHER STATEMENT  
NATIONAL WEATHER SERVICE JACKSON MS  
659 PM CDT MON APR 28 2014  
 
MSC121-123-290045-  
/O.CON.KJAN.TO.W.0054.000000T0000Z-140429T0045Z/  
SCOTT MS-RANKIN MS-  
659 PM CDT MON APR 28 2014  
 
...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL RANKIN AND  
SOUTHERN SCOTT COUNTIES UNTIL 745 PM CDT...  
 
AT 700 PM CDT...A CONFIRMED LARGE AND EXTREMELY DANGEROUS TORNADO WAS  
LOCATED 5 MILES SOUTHWEST OF PELAHATCHIE...AND MOVING EAST AT 35 MPH.  
 
THIS IS A PARTICULARLY DANGEROUS SITUATION.  
 
HAZARD...DAMAGING TORNADO.  
 
SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO.  
 

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What time are we looking at this turning mostly linear?

 

Winds are becoming locally backed a bit near the line as a meso low forms and just lots of upward motion naturally inducing low pressure near the line of storms. Bulk shear also still supports supercells and the LLJ is actually increasing. However, you can get the sense of things starting to be a little less discrete with more of a line of heavier shwrs and tstms, but with embedded supercells. Also, you'll slowly lose instability with nightfall.

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Just a note: I have noticed over the years during outbreaks that use "large and dangerous" tornado during the daylight hours from spotters/chasers/police/etc...the same reports during the outbreak after sunset often end up NOT being "large and dangerous" after all

 

stroms seem to be slowly forming into a line

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Winds are becoming locally backed a bit near the line as a meso low forms and just lots of upward motion naturally inducing low pressure near the line of storms. Bulk shear also still supports supercells and the LLJ is actually increasing. However, you can get the sense of things starting to be a little less discrete with more of a line of heavier shwrs and tstms, but with embedded supercells. Also, you'll slowly lose instability with nightfall.

 

The NAM 4km for the current hour still has SB CAPE values of 4000-4500 J/kg in parts of Mississippi.  Pretty respectable.

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SEVERE WEATHER STATEMENT  
NATIONAL WEATHER SERVICE JACKSON MS  
1209 AM GMT TUE APR 29 2014  
 
MSC121-123-290045-  
/O.CON.KJAN.TO.W.0054.000000T0000Z-140429T0045Z/  
SCOTT MS-RANKIN MS-  
708 PM CDT MON APR 28 2014  
 
...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL RANKIN AND  
SOUTHERN SCOTT COUNTIES UNTIL 745 PM CDT...  
 
AT 709 PM CDT...A CONFIRMED LARGE AND EXTREMELY DANGEROUS TORNADO WAS  
LOCATED NEAR PELAHATCHIE...AND MOVING EAST AT 35 MPH.  
 

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Winds are becoming locally backed a bit near the line as a meso low forms and just lots of upward motion naturally inducing low pressure near the line of storms. Bulk shear also still supports supercells and the LLJ is actually increasing. However, you can get the sense of things starting to be a little less discrete with more of a line of heavier shwrs and tstms, but with embedded supercells. Also, you'll slowly lose instability with nightfall.

We've been pretty lucky with the short-term evolutions of the mesocyclones today…having Jackson, Athens, the Atlanta metro, and several fairly large towns under the gun with tornado emergencies, but mostly escaping the worst, though some rural areas were certainly hit hard. But many areas still have to survive the night.

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We've been pretty lucky with the short-term evolutions of the mesocyclones today…having Jackson, Athens, the Atlanta metro, and several fairly large towns under the gun with tornado emergencies, but mostly escaping the worst, though some rural areas were certainly hit hard. But many areas still have to survive the night.

 

What?

 

Tupelo and Louisville, MS are both large towns, and they both took severe hits.

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SUMMARY...THREAT FOR STRONG TORNADOES WILL CONTINUE THROUGH MUCH OF
THE EVENING FROM SWRN THROUGH ECNTRL MS...CNTRL AND NRN AL INTO
SCNTRL AND SERN TN. PDS TORNADO WATCH 108 WILL BE REPLACED BY
ANOTHER TORNADO WATCH /POSSIBLY PDS/ BEFORE ITS EXPIRATION TIME OF
02Z AND THE NEW WATCH WILL LIKELY EXTEND FARTHER EAST INTO AL.

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What?

 

Tupelo and Louisville, MS are both large towns, and they both took severe hits.

You're right…I didn't see all the images in the thread yet. I also meant that Louisville's downtown missed the worst, but that the SE side obviously sustained a severe hit. The Mayflower-Vilonia tornado from yesterday was almost certainly in the EF3-EF4 range, as were at least a few of today's events.

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