SWOMCD
SPC MCD 280120
ILZ000-MOZ000-280245-
MESOSCALE DISCUSSION 1939
NWS STORM PREDICTION CENTER NORMAN OK
0820 PM CDT SUN JUL 27 2008
AREAS AFFECTED...NE THROUGH E CNTRL MO AND W CNTRL IL
CONCERNING...SEVERE THUNDERSTORM WATCH 763...
VALID 280120Z - 280245Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 763
CONTINUES.
SIGNIFICANT WIND DAMAGE AND VERY LARGE HAIL WILL REMAIN LIKELY NEXT
COUPLE HOURS AS STORMS MOVE THROUGH THE ERN HALF OF MO AND WRN IL.
BASED ON THE CURRENT SPEED...STORMS WILL APPROACH THE ST LOUIS AREA
BETWEEN 230Z AND 03Z. UNLESS TRENDS BEGIN TO SUGGEST A WEAKENING
TREND...ANOTHER WW WILL PROBABLY BE NEEDED BY 03Z FOR PARTS OF SERN
MO AND SRN IL.
WELL ORGANIZED MCS EXTENDS FROM NERN MO THROUGH W CNTRL IL MOVING
SSEWD AT 40-45 KT. RADAR DATA INDICATE A ROTATING COMMA HEAD ALONG
PORTION OF LINE IN W CNTRL IL. TRAILING STORM ON WRN END OF LINE
CONTINUES TO SHOW SUPERCELL CHARACTERISTICS. LARGE HAIL UP TO 4
INCHES AND DAMAGING WIND IN EXCESS OF 70 MPH HAS BEEN CONFIRMED WITH
THIS MCS. THE STORMS WILL LIKELY CONTINUE SSEWD AS A FORWARD
PROPAGATING MCS ALONG INSTABILITY GRADIENT WHERE CAP IS WEAKER ALONG
ERN FRINGE OF EML.
..DIAL.. 07/28/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILX...LSX...EAX...
39859212 39859128 39999001 39458936 38868928 38608965
38379061 38409177 38869307 39759306
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