SWOMCD
SPC MCD 282223
FLZ000-GAZ000-290000-
MESOSCALE DISCUSSION 1608
NWS STORM PREDICTION CENTER NORMAN OK
0523 PM CDT SAT JUL 28 2007
AREAS AFFECTED...PORTIONS NRN FL AND SRN/ERN GA.
CONCERNING...SEVERE THUNDERSTORM WATCH 599...
VALID 282223Z - 290000Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 599
CONTINUES.
WW MAY BE CLEARED AS OUTFLOW STABILIZED AIR MASS...AND/OR ALLOWED TO
EXPIRE AS SCHEDULED AT 00Z.
SVR THREAT OVER WW BASICALLY HAS BIFURCATED BECAUSE OF STABILIZING
EFFECTS OF OUTFLOW...BETWEEN TWO PRIMARY CONVECTIVE REGIMES. NRN
ACTIVITY...EVIDENT AS MULTICELLULAR CLUSTERS OF STG-SVR TSTMS
BETWEEN AGS-SAV-AMG-65 ENE ABY...MAY PRODUCE DAMAGING GUSTS AND
ISOLATED/MRGLLY SVR HAIL FOR ANOTHER COUPLE HOURS UNTIL COVERAGE OF
OUTFLOW AIR BECOMES LARGE/DEEP ENOUGH TO REMOVE AREAS OF SIGNIFICANT
SFC-BASED INSTABILITY. MEANWHILE TSTMS OVER NRN FL -- PRIMARILY
PORTIONS SUWANNEE/GILCHRIST/ALACHUA/COLUMBIA COUNTIES AS OF 22Z --
SHOULD CONTINUE MOVING SEWD BUT WITH GENERAL NWWD
BACKBUILDING/PROPAGATION INTO REMAINING POCKET OF FAVORABLE BUOYANCY
OVER NWRN FL WITH MLCAPES AROUND 2000 J/KG. ISOLATED DAMAGING GUSTS
ALSO ARE POSSIBLE FROM THIS ACTIVITY...WITH COMBINATION OF OUTFLOW
AND DIABATIC SFC COOLING REDUCING SVR THREAT AFTER ABOUT 00Z.
.EDWARDS.. 07/28/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...MLB...TBW...JAX...FFC...TAE...
29538266 30008300 30388274 30598241 31968243 32758202
32398135 31368068 30928133 30668206 30248223 29828183
29368145
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