SWOMCD
SPC MCD 221627
FLZ000-221830-
MESOSCALE DISCUSSION 0855
NWS STORM PREDICTION CENTER NORMAN OK
1127 AM CDT FRI MAY 22 2009
AREAS AFFECTED...SRN/CNTRL FL
CONCERNING...HEAVY RAINFALL
VALID 221627Z - 221830Z
RAINBAND ATTENDANT TO THE GULF OF MEXICO LOW WILL SHIFT SLOWLY NWD
THROUGH EARLY AFTN ACROSS SRN/CNTRL FL. HEAVIEST AXIS OF RNFL WILL
LIKELY EVOLVE FROM THE MIAMI-DADE REGION NWD THROUGH ERN BROWARD
COUNTY...AND FROM LAKE OKEECHOBEE NWWD INTO POLK COUNTY. HOURLY
RATES COULD EASILY EXCEED 1-3 INCHES.
VORTICITY SPOKE ROTATING AROUND DEEP LAYER CYCLONE CENTERED 260
MILES W OF KTPA WILL MOVE NWD THROUGH CNTRL FL THIS AFTN. MODEST
LLVL CONVERGENCE BENEATH THIS BAND AND WITHIN WEAKLY CAPPED AND VERY
MOIST AIR MASS /MLCAPES 1500-2000 J PER KG AND PWATS 1.5-1.8 INCHES/
HAVE CONTRIBUTED TO NUMEROUS TSTMS. PRIMARY BAND OF STORMS WILL
TRANSLATE NWD AT 10-15 KTS WITH LEADING CONVECTION MERGING AND
BOOSTING RNFL RATES. SRN PORTIONS OF THE LINE WILL BE ORIENTED SUCH
THAT TRAINING RAINFALL WILL BE AN ISSUE ACROSS THE URBAN CORRIDOR
ALONG THE SERN CST. IN ADDITION TO THE HVY RNFL THREAT...GUSTY
WINDS TO 30-40 KTS WILL BE LIKELY AS STRONGER CORES COLLAPSE.
..RACY.. 05/22/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MFL...MLB...TBW...
LAT...LON 25668013 25598042 26748096 27228137 27848213 28418213
28528159 28288106 27798067 27148029 25668013
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