AREAS AFFECTED...CNTRL/ERN IA...NRN IL...FAR SRN WI
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 290359Z - 290600Z
PROBABILITY OF WATCH ISSUANCE...5 PERCENT
SUMMARY...MOSTLY SMALL HAIL BUT ISOLATED HAIL TO 1 INCH IN DIAMETER
SHOULD PERSIST NEXT FEW HOURS WITHIN AN EXPANDING AREA OF ELEVATED
TSTMS DEVELOPING E/NEWD FROM THE I-80 CORRIDOR.
DISCUSSION...ROBUST LOW-LEVEL WARM THETA-E ADVECTION AIDED BY A 55
KT LLJ ACROSS THE MID-MO VALLEY WILL SUPPORT PERSISTENT ELEVATED
TSTM DEVELOPMENT N OF AN ARCING WARM FRONT ALONG THE MO/IA BORDER TO
SRN IL. MUCAPE WILL REMAIN WEAK WITH MODEST MID-LEVEL LAPSE RATES
AROUND 6.5 C/KM PER 00Z TOP RAOB. NEVERTHELESS...SUFFICIENT
CLOUD-BEARING SHEAR DOES EXIST FOR ORGANIZED MULTICELL CLUSTERS
CAPABLE OF PRODUCING ISOLATED MARGINALLY SEVERE HAIL.
..GRAMS/HART.. 01/29/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...MKX...DVN...ARX...DMX...
LAT...LON 42269436 42809343 42999203 42818943 42608797 41758751
41408763 41088792 40878859 40928945 41129038 41449213
41729364 41779435 42269436
