SWOMCD
SPC MCD 262242
OHZ000-KYZ000-MIZ000-INZ000-270015-
MESOSCALE DISCUSSION 0602
NWS STORM PREDICTION CENTER NORMAN OK
0542 PM CDT THU APR 26 2007
AREAS AFFECTED...NRN IND...NRN AND CNTRL OH
CONCERNING...TORNADO WATCH 191...193...
VALID 262242Z - 270015Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 191 AND TORNADO WATCH
193 CONTINUES.
LATEST SFC ANALYSIS SHOWS A 1002 MB LOW OVER FAR NE IL/FAR NW IND
WITH A COLD FRONT EXTENDING SWD ACROSS WRN IND INTO WRN KY. A WARM
FRONT EXTENDS EWD FROM THE SFC LOW ACROSS NRN IND AND NCNTRL OH.
SOUTH AND EAST OF THESE BOUNDARIES...THE WARM SECTOR CONTAINS
SEVERAL POCKETS OF ENHANCED INSTABILITY WITH SBCAPE VALUES AROUND
1000 J/KG. A LINE OF STRONG TO SEVERE THUNDERSTORMS IS ONGOING
ACROSS NRN AND CNTRL IND WITH ANOTHER BROKEN LINE PRESENT ACROSS FAR
ERN IND AND FAR NRN KY. THIS ACTIVITY IS DEVELOPING ON THE NOSE OF A
DRY SLOT AND IS BEING SUPPORTED BY A STRONG LOW-LEVEL JET.
THE LATEST FORECAST SOUNDINGS ACROSS THE MD AREA SHOW 0-6 KM SHEAR
VALUES AROUND 50 KT WITH STRONG SPEED SHEAR EVIDENT ON LOCAL WSR-88D
VWPS. THIS SHOULD BE SUFFICIENT TO CONTINUE A SUPERCELL AND ISOLATED
TORNADO THREAT OVER THE NEXT FEW HOURS. ALTHOUGH LAPSE RATES ARE NOT
PARTICULARLY STEEP...OBJECTIVE ANALYSIS DOES SHOW A POCKET OF
STEEPER MID-LEVEL LAPSE RATES OVER NRN IND AND NW OH WHICH SHOULD BE
CONDUCIVE FOR LARGE HAIL. ISOLATED WIND DAMAGE WILL ALSO BE POSSIBLE
ESPECIALLY WITH SHORT BOWING LINE SEGMENTS.
.BROYLES.. 04/26/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PBZ...RLX...CLE...JKL...ILN...DTX...IWX...IND...LOT...
39288217 38438308 38608426 39928557 40568725 41508725
41818655 41838427 41308135 40198120
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