SWOMCD
SPC MCD 182048
MIZ000-OHZ000-INZ000-182215-
MESOSCALE DISCUSSION 1352
NWS STORM PREDICTION CENTER NORMAN OK
0348 PM CDT SUN JUL 18 2010
AREAS AFFECTED...SRN LOWER MI...NERN IND AND NWRN OH
CONCERNING...SEVERE THUNDERSTORM WATCH 491...
VALID 182048Z - 182215Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 491
CONTINUES.
ISOLATED DAMAGING WIND AND MAYBE SOME HAIL WILL REMAIN POSSIBLE NEXT
COUPLE HOURS WITH STORMS MOVING THROUGH SRN LOWER MI...IND AND WRN
OH. OTHER STORMS ARE DEVELOPING SOUTH AND EAST OF WW 491...BUT DUE
TO MARGINAL ORGANIZATIONAL POTENTIAL...ANOTHER WW IS NOT ANTICIPATED
AT THIS TIME.
AREA OF PRE-FRONTAL STORMS INCLUDING DISCRETE CELLS...LINE SEGMENTS
AND SMALL CLUSTERS IS MOVING THROUGH ZONE OF MAX INSTABILITY
/2000-2500 J/KG MLCAPE/ FROM SERN LOWER MI INTO NRN/CNTRL IND AND
WRN OH. MOST STORMS HAVE REMAINED MULTICELL IN NATURE AND LOOSELY TO
POORLY ORGANIZED. HOWEVER...ACTIVITY OVER SRN LOWER MI HAS SHOWN
MARGINAL SUPERCELL CHARACTERISTICS WHERE VERTICAL SHEAR IS SLIGHTLY
STRONGER. STORMS WILL CONTINUE TO POSE A THREAT FOR ISOLATED
DAMAGING WIND AS THEY DEVELOP EWD. LARGE HAIL THREAT IS SOMEWHAT
LIMITED BY WEAK MID-LEVEL LAPSE RATES. INSTABILITY DECREASES WITH
ERN EXTENT INTO CNTRL AND NRN OH...WHICH COULD LIMIT SEVERE
POTENTIAL BEYOND WW 491.
..DIAL.. 07/18/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND...
LAT...LON 43178555 43348476 43028367 42448350 41608383 40908427
40188511 40328588 40978595 41728574 42598587 43178555
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