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MESOSCALE DISCUSSION 2113
NWS STORM PREDICTION CENTER NORMAN OK
0715 PM CDT THU OCT 15 2009
AREAS AFFECTED...SRN GA
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 160015Z - 160145Z
THE THREAT FOR ISOLATED SEVERE STORMS CAPABLE OF LOCALLY STRONG WIND
GUSTS AND PERHAPS A BRIEF TORNADO IS EXPECTED TO CONTINUE ACROSS
PARTS OF SRN GA TONIGHT. A WW IS NOT ANTICIPATED.
A CLUSTER OF TSTMS WHICH INITIATED EARLIER TODAY OVER NRN/CNTRL AL
HAS BEEN MAINTAINED...EXTENDING FROM CRISP TO RANDOLPH COUNTIES IN
SRN GA AS OF 00Z. SYSTEM MOVEMENT WAS 295/25 KT. A FAIRLY
PERSISTENT SUPERCELL STRUCTURE HAS BEEN MAINTAINED WITHIN EVOLVING
QLCS...GENERALLY PROPAGATING SEWD WITHIN TRAILING LINE SEGMENT. 00Z
JAX SOUNDING APPEARS REPRESENTATIVE OF AMBIENT THERMODYNAMIC
CONDITIONS...FEATURING A VERY MOIST LOWER TO MID TROPOSPHERE WITH PW
VALUES AROUND 2.3 INCHES AND MLCAPE OF 2000-2500 J/KG. AREA VWPS
SUGGEST THAT KINEMATIC ENVIRONMENT REMAINS SUPPORTIVE OF
ORGANIZED/ROTATING STORMS GIVEN 40-50 KT OF DEEP-LAYER SHEAR. 0-1
KM BULK SHEAR IS SOMEWHAT WEAKER /20-25 KT/...BUT GIVEN THE
MOIST/LOW LCL AIR MASS...SOME POTENTIAL WILL EXIST FOR A BRIEF
TORNADO IN ADDITION TO LOCALLY DAMAGING WIND GUSTS.
THE GENERALLY WEAK LAPSE RATES AND ABSENCE OF STRONGER LOW-LEVEL
SHEAR WILL LIKELY PRECLUDE ANY MORE ORGANIZED WIND/TORNADO
POTENTIAL.
..MEAD.. 10/16/2009
ATTN...WFO...CHS...JAX...FFC...TAE...
LAT...LON 31428466 32088428 32308270 32128161 31568127 30938169
30888339 31428466
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