AREAS AFFECTED...NE INTO E-CNTRL IL AND W-CNTRL IND
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 172004Z - 172100Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...SEVERE THREAT INCREASING ACROSS THE MCD AREA. STRONG WINDS
AND HAIL MAY BE INITIAL THREAT BUT TORNADO RISK WILL INCREASE BY
EARLY EVENING. A WW WILL LIKELY BE ISSUED WITHIN THE HOUR.
DISCUSSION...SEVERE THREAT WILL CONTINUE SOUTH AND EAST OF WW115
THIS AFTERNOON AND EVENING AS STORMS DEVELOP ALONG AND NORTH OF THE
WARM FRONT. A WARM/MOIST UNSTABLE AIRMASS WILL CONTINUE TO
OVERSPREAD THE REGION AS EFFECTIVE SHEAR INCREASES LATE THIS
AFTERNOON. INITIALLY...STORMS MAY BE SLIGHTLY ELEVATED...POSING
MAINLY A HAIL AND/OR WIND THREAT. HOWEVER...AS STORMS DEVELOP
SOUTHWARD THEY COULD BECOME ROOTED IN THE BOUNDARY LAYER NEAR THE
WARM FRONT /CURRENTLY MOVING SLOWLY NWD ACROSS CENTRAL IL/. AS THIS
OCCURS...LOW LEVEL SHEAR WILL INCREASE AND ATTENDANT TORNADO THREAT
ALSO WILL INCREASE. AS SUCH A WW WILL BE NEEDED WITHIN THE HOUR.
..LEITMAN/KERR.. 04/17/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...IWX...IND...LOT...ILX...LSX...
LAT...LON 38928862 39108744 39448664 39958638 40668632 41328667
41498728 41538758 41548805 40998893 40448972 40139021
39879030 39419002 39038943 38928862
