SWOMCD
SPC MCD 182159
INZ000-ILZ000-WIZ000-IAZ000-MNZ000-182330-
MESOSCALE DISCUSSION 1525
NWS STORM PREDICTION CENTER NORMAN OK
0459 PM CDT WED JUL 18 2007
AREAS AFFECTED...ERN IA/SRN WI/NRN IL/NWRN INDIANA
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 182159Z - 182330Z
STORMS AND ATTENDANT SEVERE THREAT ARE FORECAST TO SPREAD ESEWD
ACROSS IA INTO SRN WI/NRN AND CENTRAL IL OVER THE NEXT FEW HOURS.
NEW WW WILL LIKELY BE ISSUED.
STORMS CONTINUE TO EXPAND ACROSS N CENTRAL IA ATTM...SPREADING ESEWD
THROUGH A MOIST/MODERATELY-UNSTABLE ENVIRONMENT. MEAN-LAYER CAPE IN
EXCESS OF 3000 J/KG PERSISTS DOWNSTREAM OF ONGOING ACTIVITY PER
LATEST OBJECTIVE ANALYSIS AND MODIFIED 18Z DAVENPORT IA RAOB --
WHICH WILL SUPPORT ONGOING CONVECTIVE POTENTIAL. GIVEN WNWLY
MID-LEVEL FLOW AS HIGH AS 45 KT AND FORECAST ORGANIZATION OF
CONVECTIVE COLD POOL WITH TIME...THREAT FOR DAMAGING WINDS APPEARS
LIKELY AS THE CONVECTIVE CLUSTER MOVES ESEWD.
.GOSS.. 07/18/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...IWX...IND...LOT...ILX...MKX...DVN...ARX...DMX...
43739219 43498796 41478713 40438680 39938773 40939224
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