Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 202219
SWOMCD
SPC MCD 202219
MIZ000-INZ000-ILZ000-202315-

MESOSCALE DISCUSSION 1744
NWS STORM PREDICTION CENTER NORMAN OK
0519 PM CDT SAT SEP 20 2014

AREAS AFFECTED...PORTIONS OF SRN LOWER MI...NRN INDIANA...NERN IL

CONCERNING...SEVERE THUNDERSTORM WATCH 504...

VALID 202219Z - 202315Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 504
CONTINUES.

SUMMARY...THE RISK FOR SVR TSTMS CONTINUES ACROSS REMAINING VALID
PORTIONS OF SEVERE THUNDERSTORM WATCH 504.

DISCUSSION...MULTICELL CLUSTERS HAVE EVOLVED INTO A MORE ORGANIZED
QUASI-LINEAR CONVECTIVE SYSTEM EXTENDING FROM S-CNTRL LOWER MI SWWD
ACROSS NRN INDIANA INTO E-CNTRL IL. THIS ACTIVITY IS ADVANCING EWD
AT AROUND 40-50 KT...WITH EMBEDDED BOWING SEGMENTS CAPABLE OF
SUPPORTING DMGG WIND GUSTS. MODERATE WLY FLOW THROUGH THE CLOUD
LAYER WILL CONTINUE TO ENHANCE THE RISK FOR DMGG WIND GUSTS VIA
CONVECTIVE MOMENTUM TRANSPORT AMIDST 500-1000 J/KG OF MLCAPE. THIS
ACTIVITY WILL CLEAR ERN PORTIONS OF REMAINING VALID PORTIONS OF WW
504 DURING THE NEXT FEW HOURS...WITH LITTLE IN THE WAY OF A ROBUST
SVR-TSTM RISK IN THE WAKE OF THIS ACTIVITY.

..COHEN.. 09/20/2014

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...IWX...GRR...IND...LOT...ILX...

LAT...LON   40748594 40448824 40648872 41128757 41778553 42128484
            41088486 40748594



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