[LeArc] MESOSCALE DISCUSSION 1640

[Duane Whittingham]

MESOSCALE DISCUSSION 1640
NWS STORM PREDICTION CENTER NORMAN OK
1046 PM CDT SAT JUL 05 2003
   
AREAS AFFECTED...SRN IA...NRN MO...CNTRL IL
   
CONCERNING...SEVERE THUNDERSTORM WATCH 649...651...
   
VALID 060346Z - 060445Z
   
CNTRL/ERN PORTIONS OF WW:  ELEVATED TSTMS HAVE REDEVELOPED ACROSS
PORTIONS OF CNTRL/ERN IL ALONG/NORTH OF OUTFLOW BOUNDARY.  AIR
PARCELS ARE ORIGINATING ACROSS THE MID MS VLY WHERE AIR MASS REMAINS
UNSTABLE.  INCREASING ISENTROPIC LIFT ON SWLY LLJ WILL CONTINUE TO
FAVOR BACKBUILDING TSTMS INTO CNTRL/ERN IL WITH A MARGINALLY SEVERE
HAIL AND HEAVY RAINFALL THREAT.  OTHERWISE...LINE SEGMENT HAS
EVOLVED FROM TSTM MERGER OVER NERN TIP OF MO.  THIS WILL BE MOVING
ESEWD INTO A LARGELY UNTOUCHED AIR MASS AND MAY GIVE A DAMAGING WIND
THREAT ACROSS WCNTRL IL THE NEXT COUPLE OF HOURS.  
   
WRN PORTIONS OF WW: LARGE MCS CONTINUES TO EVOLVE OVER CNTRL/ERN NEB
AND COLD POOL IS BECOMING STRONGER.  MCS MOTION VECTORS SUGGEST THAT
THIS COMPLEX WILL MOVE INTO THE MID MO VLY AND INTO WRN PORTIONS OF
THE WW ACROSS SWRN IA AND NWRN MO IN A FEW HOURS.  THUS...A DAMAGING
WIND AND HAIL THREAT WILL INCREASE ONCE AGAIN.
   
ANOTHER WW WILL LIKELY BE REQUIRED BY MIDNIGHT FOR PARTS OF ERN
NEB...SRN IA/NRN MO AND PERHAPS AS FAR EAST AS IL.
   
..RACY.. 07/06/2003

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Duane Whittingham (N9SSN) - Producer
Tom and Darryl Radio Shows & Saturday Morning Confusion
Heard on C-Band Analog Satellite (W0KIE) - GE7-CH5-7.5 mHz
WTND-LP Macomb 106.3, WQNA FM, WBCQ 7415 kHz & the Internet.
Heard Fridays 9pm ET, Sundays 12am ET and Tuesdays 1am ET
An Independent Freeform Eclectic Radio Show.
http://www.tomanddarryl.org
http://www.wtnd.us

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