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MESOSCALE DISCUSSION 0103
NWS STORM PREDICTION CENTER NORMAN OK
0431 PM CST WED JAN 30 2013
AREAS AFFECTED...NORTH FL/SOUTHEAST GA INTO SC
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 302231Z - 302330Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...AN ADDITIONAL TORNADO WATCH ISSUANCE WILL LIKELY BE NEEDED
FOR PORTIONS OF THE FL PANHANDLE/NORTH FL INTO SOUTHEAST GA AND SC.
DISCUSSION...A MODESTLY BROKEN CONVECTIVE LINE /WITH SOME LEADING
SEMI-DISCRETE TSTMS ACROSS GA/ HAS SHOWN SOME INCREASING SIGNS OF
ORGANIZATION/EASTWARD PROGRESSION OVER THE PAST HOUR OR SO...WITH
SOME HIGHER RADAR REFLECTIVITY/COLDER CLOUD TOPS. THIS MAY BE TIED
TO THE EASTWARD-SPREAD OF FAVORABLE DEEP LAYER FORCING FOR ASCENT IN
ASSOCIATION WITH THE BASE OF THE UPPER TROUGH OVER THE GULF COAST
REGION. AS A MOIST AIRMASS CONTINUES TO STREAM NORTHWARD FROM THE
GULF OF MEXICO /60S F SURFACE DEWPOINTS/...AMPLE FORCING/VERTICAL
SHEAR WILL CONTRIBUTE TO ORGANIZED STORM MODES INCLUDING SOME
SUPERCELLS/BOWING SEGMENTS WITH AN OTHERWISE DOMINANT QLCS. DAMAGING
WINDS AND A RISK FOR ISOLATED TORNADOES WILL BE THE PRIMARY CONCERN
ACROSS NORTH FL INTO EAST/SOUTHEAST GA AND SC.
..GUYER/CORFIDI.. 01/30/2013
ATTN...WFO...CHS...CAE...JAX...FFC...TAE...
LAT...LON 29968539 30748490 30728408 31948337 33518258 33658162
32808100 31148233 29998356 29968539
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