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Mesoscale Discussion 671 |
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MESOSCALE DISCUSSION 0671
NWS STORM PREDICTION CENTER NORMAN OK
0314 PM CDT FRI MAY 23 2014
AREAS AFFECTED...CAROLINAS
CONCERNING...SEVERE THUNDERSTORM WATCH 178...179...
VALID 232014Z - 232145Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
178...179...CONTINUES.
SUMMARY...NEAR-TERM SEVERE RISK EXISTS ACROSS UPSTATE SC WITH LARGE
HAIL AS THE PRIMARY HAZARD WITH SPLITTING DISCRETE CELLS. SOME OF
THIS ACTIVITY MAY AFFECT PARTS OF FAR S-CNTRL NC FROM UNION TO
RICHMOND COUNTIES. ISOLATED STORMS FINALLY APPEAR TO BE FORMING OVER
THE COASTAL PLAIN WITH LARGE HAIL ANTICIPATED WITH THIS ACTIVITY AS
WELL.
DISCUSSION...REPORTED HAIL UP TO GOLF-BALL SIZE CONFIRMED BY WDSS-II
MAXIMUM HAIL ALGORITHM...HAS OCCURRED WITH MULTIPLE SPLITTING CELLS
NOW OVER SPARTANBURG/UNION COUNTIES SC. A LONG AND NEARLY
STRAIGHT-LINE HODOGRAPH SAMPLED BY GSP VWP DATA WILL CONTINUE TO
FAVOR LEFT/RIGHT SPLITS. EWD EXTRAPOLATION OF THESE CELLS MAY BRUSH
PORTIONS OF FAR S-CNTRL NC FROM UNION TO RICHMOND COUNTIES WHICH ARE
CURRENTLY JUST OUTSIDE OF WW/S 178/179.
1-MIN RESOLUTION VISIBLE SATELLITE IMAGERY AND LIGHTNING STRIKES
INDICATE INCIPIENT TSTM DEVELOPMENT OVER MARION/FLORENCE COUNTIES OF
SC. ADDITIONAL CLUMPING CU HAS BEEN NOTED INTO PARTS OF SERN NC.
WEAKLY-FORCED NATURE OF THE ENVIRONMENT IN THE WAKE OF A NOW
DISSIPATED MCV OFF THE OUTER BANKS WILL FAVOR DISCRETE CELLS
PRIMARILY PRODUCING LARGE HAIL AND LOCALLY DAMAGING WINDS. TSTM
INITIATION ACROSS NRN PORTIONS OF WW 178 APPEARS INCREASINGLY
UNLIKELY GIVEN THE LACK OF CU AND DRIER SURFACE DEW POINTS /IN THE
MIDDLE TO UPPER 50S/ RELATIVE TO FARTHER S/SW.
..GRAMS.. 05/23/2014
ATTN...WFO...MHX...RAH...ILM...CHS...CAE...GSP...
LAT...LON 32788091 33238181 33828237 34388288 34768295 34998236
35088124 35128015 35127951 35087839 35087678 34707653
33587802 32478013 32788091
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