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April 26th-30th, 2014 Major Tornado Outbreak


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Well its still unclear if the current set of storms in LA are going to fracture into distinct supercelluar echoes or if they will congeal into a squall line. Those storms are closer to the cold front so there is more synoptic scale forcing that could easily congeal the line into a squall. If it moves out ahead of this boundary though, then we may get the more discrete formation we have seen with the cells in MS

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Oh boy...

 

MESOSCALE DISCUSSION 0459
NWS STORM PREDICTION CENTER NORMAN OK
0349 PM CDT MON APR 28 2014

AREAS AFFECTED...CENTRAL/NE MS AND NW AL

CONCERNING...TORNADO WATCH 108...

VALID 282049Z - 282215Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 108 CONTINUES.

SUMMARY...DANGEROUS TORNADO OUTBREAK UNDERWAY WITH MULTIPLE
SUPERCELLS CAPABLE OF PRODUCING LONG TRACK...STRONG/VIOLENT
TORNADOES NEXT FEW HOURS.

DISCUSSION...MULTIPLE DISCRETE AND CLUSTER SUPERCELLS ARE MOVING
NEWD FROM CENTRAL MS INTO NW AL. RADAR AND SPOTTER REPORTS HAVE
CONFIRMED A DAMAGING TORNADO NEAR TUPELO MS IN THE PAST HOUR...WHILE
OTHER MORE DISCRETE STORMS HAVE FORMED FARTHER TO S INTO CENTRAL MS.
ALIGNMENT OF THE STORM INITIATION AND SPACING OF THE STORMS IN
CENTRAL MS SUGGEST THAT THESE STORMS WILL REMAIN DISCRETE FOR
SEVERAL HOURS...SUPPORTING THE POTENTIAL FOR LONG-TRACK TORNADOES.
ADDITIONALLY...LOCAL VWP/S HAVE SHOWN THE EXPECTED STRENGTHENING OF
WIND PROFILES AND SOME BACKING OF LOW-LEVEL FLOW ASSOCIATED WITH
SURFACE PRESSURE FALLS...WHICH IS BOOSTING EFFECTIVE SRH TO NEAR 300
M2/S2. STRONG TO VIOLENT TORNADO DAMAGE WILL BE POSSIBLE WITH THE
MOST INTENSE SUPERCELLS THE NEXT FEW HOURS

..THOMPSON.. 04/28/2014
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