AREAS AFFECTED...A SMALL PARTS OF NERN IL THROUGH CNTRL AND NRN IND
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 010247Z - 010345Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...BOW ECHO STORMS MOVING RAPIDLY THROUGH CNTRL IL WILL
APPROACH WRN IND BY 04Z. UNLESS THESE STORMS BEGIN TO SHOW SIGNS OF
WEAKENING...A WW WILL LIKELY BE NEEDED BY 0315Z TO INCLUDE A SMALL
PARTS OF NERN IL AND MUCH OF CNTRL IND.
DISCUSSION...BOWING LINE SEGMENT MOVING THROUGH CNTRL IL AT 40 KT
WILL APPROACH THE IND BORDER AROUND 04Z. OTHER STORMS ARE DEVELOPING
FARTHER NORTH ON WARM ADVECTION WING AND MAY POSE A THREAT FOR LARGE
HAIL AND DAMAGING WIND ACROSS A SMALL PART OF NERN IL...BUT PRIMARY
SEVERE THREAT WILL REMAIN WITH COMMA HEAD AND BOW ECHO. THE
ATMOSPHERE DOWNSTREAM REMAINS MODERATELY UNSTABLE WITH 1000-1500
J/KG MLCAPE AND WITH VERTICAL SHEAR FROM 35-40 KT SUFFICIENT TO
MAINTAIN STORM ORGANIZATION.
..DIAL/KERR.. 06/01/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILN...IWX...IND...LOT...ILX...
LAT...LON 39108729 39988747 40788818 40908716 40508607 39848518
39218574 39108729
